declare module 'testcafe' {
    global {

        interface KeyModifiers {
            ctrl?: boolean;
            alt?: boolean;
            shift?: boolean;
            meta?: boolean
        }

        interface CropOptions {
            /**
             * The top edge of the cropping rectangle. The coordinate is calculated from the element's top edge.
             * If a negative number is passed, the coordinate is calculated from the element's bottom edge.
             */
            left?: number;
            /**
             * The left edge of the cropping rectangle. The coordinate is calculated from the element's left edge.
             * If a negative number is passed, the coordinate is calculated from the element's right edge.
             */
            right?: number;
            /**
             * The bottom edge of the cropping rectangle. The coordinate is calculated from the element's top edge.
             * If a negative number is passed, the coordinate is calculated from the element's bottom edge.
             */
            top?: number;
            /**
             * The right edge of the cropping rectangle. The coordinate is calculated from the element's left edge.
             * If a negative number is passed, the coordinate is calculated from the element's right edge.
             */
            bottom?: number;
        }

        interface ActionOptions {
            /**
             * The speed of action emulation. Defines how fast TestCafe performs the action when running tests.
             * A value between 1 (the maximum speed) and 0.01 (the minimum speed). If test speed is also specified in the CLI or
             * programmatically, the action speed setting overrides test speed. Default is 1.
             */
            speed?: number;
        }

        interface TakeScreenshotOptions {
            /**
             * Specifies the path where the screenshots are saved.
             */
            path?: string;
            /**
             * Specifies that TestCafe should take full-page screenshots.
             */
            fullPage?: boolean;
        }

        interface TakeElementScreenshotOptions extends ActionOptions {
            /**
             * Allows to crop the target element on the screenshot.
             */
            crop?: CropOptions;
            /**
             * Controls if element's margins should be included in the screenshot.
             * Set this property to `true` to include target element's margins in the screenshot.
             * When it is enabled, the `scrollTargetX`, `scrollTargetY` and `crop` rectangle coordinates are calculated from
             * the corners where top and left (or bottom and right) margins intersect
             */
            includeMargins?: boolean;
            /**
             * Controls if element's borders should be included in the screenshot.
             * Set this property to `true` to include target element's borders in the screenshot.
             * When it is enabled, the `scrollTargetX`, `scrollTargetY` and `crop` rectangle coordinates are calculated from
             * the corners where top and left (or bottom and right) internal edges of the element  intersect
             */
            includeBorders?: boolean;
            /**
             * Controls if element's paddings should be included in the screenshot.
             * Set this property to `true` to include target element's paddings in the screenshot.
             * When it is enabled, the `scrollTargetX`, `scrollTargetY` and `crop` rectangle coordinates are calculated from
             * the corners where top and left (or bottom and right) edges of the element's content area intersect
             */
            includePaddings?: boolean;
            /**
             * Specifies the X coordinate of the scrolling target point.
             * If the target element is too big to fit into the browser window, the page will be scrolled to put this point
             * to the center of the viewport. The coordinates of this point are calculated relative to the target element.
             * If the numbers are positive, the point is positioned relative to the top-left corner of the element.
             * If the numbers are negative, the point is positioned relative to the bottom-right corner.
             * If the target element fits into the browser window, these properties have no effect.
             */
            scrollTargetX?: number;
            /**
             * Specifies the Y coordinate of the scrolling target point.
             * If the target element is too big to fit into the browser window, the page will be scrolled to put this point
             * to the center of the viewport. The coordinates of this point are calculated relative to the target element.
             * If the numbers are positive, the point is positioned relative to the top-left corner of the element.
             * If the numbers are negative, the point is positioned relative to the bottom-right corner.
             * If the target element fits into the browser window, these properties have no effect.
             */
            scrollTargetY?: number;
        }

        interface MouseActionOptions extends ActionOptions {
            /**
             * Mouse pointer X coordinate that define a point where the action is performed or started.
             * If an offset is a positive integer, coordinates are calculated relative to the top-left corner of the target element.
             * If an offset is a negative integer, they are calculated relative to the bottom-right corner.
             * The default is the center of the target element.
             */
            offsetX?: number;
            /**
             * Mouse pointer Y coordinate that define a point where the action is performed or started.
             * If an offset is a positive integer, coordinates are calculated relative to the top-left corner of the target element.
             * If an offset is a negative integer, they are calculated relative to the bottom-right corner.
             * The default is the center of the target element.
             */
            offsetY?: number;
            /**
             * Indicate which modifier keys are to be pressed during the mouse action.
             */
            modifiers?: KeyModifiers;
        }

        interface ClickActionOptions extends MouseActionOptions {
            /**
             * The initial caret position if the action is performed on a text input field. A zero-based integer.
             * The default is the length of the input field content.
             */
            caretPos?: number;
        }

        interface TypeActionOptions extends ClickActionOptions {
            /**
             * `true` to remove the current text in the target element, and false to leave the text as it is.
             */
            replace?: boolean;
            /**
             * `true` to insert the entire block of current text in a single keystroke (similar to a copy & paste function),
             * and false to insert the current text character by character.
             */
            paste?: boolean;
        }

        interface DragToElementOptions extends MouseActionOptions {
            /**
             * Mouse pointer X coordinate that defines a point where the dragToElement action is finished.
             * If an offset is a positive integer, coordinates are calculated relative to the top-left corner of the destination element.
             * If an offset is a negative integer, they are calculated relative to the bottom-right corner.
             * By default, the dragToElement action is finished in the center of the destination element.
             */
            destinationOffsetX?: number;
            /**
             * Mouse pointer Y coordinate that defines a point where the dragToElement action is finished.
             * If an offset is a positive integer, coordinates are calculated relative to the top-left corner of the destination element.
             * If an offset is a negative integer, they are calculated relative to the bottom-right corner.
             * By default, the dragToElement action is finished in the center of the destination element.
             */
            destinationOffsetY?: number;
        }

        interface ResizeToFitDeviceOptions {
            /**
             * `true` for portrait screen orientation; `false` for landscape.
             */
            portraitOrientation?: boolean;
        }

        interface AssertionOptions {
            /**
             * The amount of time, in milliseconds, allowed for an assertion to pass before the test fails if a
             * selector property or a client function was used in assertion.
             */
            timeout?: number;
            /**
             * By default, a Promise is not allowed to be passed to an assertion unless it is a selector property
             * or the result of a client function. Setting this property to `true` overrides that default.
             */
            allowUnawaitedPromise?: boolean;
        }

        interface Assertion<E = any> {
            /**
             * Asserts that `actual` is deeply equal to `expected`.
             *
             * @param expected - An expected value.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            eql(expected: E, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that actual is deeply equal to expected.
             *
             * @param expected - An expected value.
             * @param options - Assertion options.
             */
            eql(expected: E, options?: AssertionOptions): TestControllerPromise;
            /**
             * Assert that `actual` is not deeply equal to `unexpected`.
             *
             * @param unexpected - An unexpected value.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            notEql(unexpected: E, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Assert that `actual` is not deeply equal to `unexpected`.
             *
             * @param unexpected - An unexpected value.
             * @param options - Assertion options.
             */
            notEql(unexpected: E, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is truthy.
             *
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            ok(message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is truthy.
             *
             * @param options - Assertion options.
             */
            ok(options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is falsy.
             *
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            notOk(message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is falsy.
             *
             * @param options - Assertion options.
             */
            notOk(options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` contains `expected`.
             *
             * @param expected - An expected value.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            contains<R>(expected: EnsureString<E> | ElementOf<E> | Extend<E, R>, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` contains `expected`.
             *
             * @param expected - An expected value.
             * @param options - Assertion options.
             */
            contains<R>(expected: EnsureString<E> | ElementOf<E> | Extend<E, R>, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` not contains `unexpected`.
             *
             * @param unexpected - An unexpected value.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            notContains<R>(unexpected: EnsureString<E> | ElementOf<E> | Extend<E, R>, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` not contains `unexpected`.
             *
             * @param unexpected - An unexpected value.
             * @param options - Assertion options.
             */
            notContains<R>(unexpected: EnsureString<E> | ElementOf<E> | Extend<E, R>, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that type of `actual` is `typeName`.
             *
             * @param typeName - The expected type of an `actual` value.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            typeOf(typeName: 'function' | 'object' | 'number' | 'string' | 'boolean' | 'undefined' | 'regex', message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that type of `actual` is `typeName`.
             *
             * @param typeName - The expected type of an `actual` value.
             * @param options - Assertion options.
             */
            typeOf(typeName: 'function' | 'object' | 'number' | 'string' | 'boolean' | 'undefined' | 'regex', options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that type of `actual` is not `typeName`.
             *
             * @param typeName - An unexpected type of an `actual` value.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            notTypeOf(typeName: 'function' | 'object' | 'number' | 'string' | 'boolean' | 'undefined' | 'regex', message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that type of `actual` is not `typeName`.
             *
             * @param typeName - An unexpected type of an `actual` value.
             * @param options - Assertion options.
             */
            notTypeOf(typeName: 'function' | 'object' | 'number' | 'string' | 'boolean' | 'undefined' | 'regex', options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is strictly greater than `expected`.
             *
             * @param expected - A value that should be less than or equal to `actual`.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            gt(expected: number, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is strictly greater than `expected`.
             *
             * @param expected - A value that should be less than or equal to `actual`.
             * @param options - Assertion options.
             */
            gt(expected: number, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is greater than or equal to `expected`.
             *
             * @param expected - A value that should be less than `actual`.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            gte(expected: number, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is greater than or equal to `expected`.
             *
             * @param expected - A value that should be less than `actual`.
             * @param options - Assertion options.
             */
            gte(expected: number, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is less than `expected`.
             *
             * @param expected - A value that should be greater than or equal to `actual`.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            lt(expected: number, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is less than `expected`.
             *
             * @param expected - A value that should be greater than or equal to `actual`.
             * @param options - Assertion options.
             */
            lt(expected: number, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is less than or equal to `expected`.
             *
             * @param expected - A value that should be greater than `actual`.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            lte(expected: number, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is less than or equal to `expected`.
             *
             * @param expected - A value that should be greater than `actual`.
             * @param options - Assertion options.
             */
            lte(expected: number, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is within a range from `start` to `finish`. Bounds are inclusive.
             *
             * @param start - A lower bound of range (included).
             * @param finish - An upper bound of range (included).
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            within(start: number, finish: number, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is within a range from `start` to `finish`. Bounds are inclusive.
             *
             * @param start - A lower bound of range (included).
             * @param finish - An upper bound of range (included).
             * @param options - Assertion options.
             */
            within(start: number, finish: number, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is not within a range from `start` to `finish`. Bounds are inclusive.
             *
             * @param start - A lower bound of range (included).
             * @param finish - An upper bound of range (included).
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            notWithin(start: number, finish: number, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` is not within a range from `start` to `finish`. Bounds are inclusive.
             *
             * @param start - A lower bound of range (included).
             * @param finish - An upper bound of range (included).
             * @param options - Assertion options.
             */
            notWithin(start: number, finish: number, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` matches the regular expression.
             *
             * @param re - A regular expression that is expected to be matched.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            match(re: RegExp, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` matches the regular expression.
             *
             * @param re - A regular expression that is expected to be matched.
             * @param options - Assertion options.
             */
            match(re: RegExp, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` does not match the regular expression.
             *
             * @param re - A regular expression that is expected to be matched.
             * @param message - An assertion message that will be displayed in the report if the test fails.
             * @param options - Assertion options.
             */
            notMatch(re: RegExp, message?: string, options?: AssertionOptions): TestControllerPromise;
            /**
             * Asserts that `actual` does not match the regular expression.
             *
             * @param re - A regular expression that is expected to be matched.
             * @param options - Assertion options.
             */
            notMatch(re: RegExp, options?: AssertionOptions): TestControllerPromise;
        }

        interface ClientFunctionOptions {
            /**
             *  Contains functions, variables or objects used by the client function internally.
             *  Properties of the `dependencies` object will be added to the client function's scope as variables.
             */
            dependencies?: {[key: string]: any},
            /**
             * If you need to call a client function from a Node.js callback, assign the current test controller to the `boundTestRun` option.
             */
            boundTestRun?: TestController
        }

        interface ClientFunction<R = any, A extends any[]= any[]> {
            /**
             * Client function
             *
             * @param args - Function arguments.
             */
            (...args: A): Promise<R>;
            /**
             * Returns a new client function with a different set of options that includes options from the
             * original function and new `options` that overwrite the original ones.
             *
             * @param options - New options.
             */
            with(options: ClientFunctionOptions): ClientFunction<R, A>;
        }

        interface ClientFunctionFactory {
            <R, A extends any[]>(fn: (...args: A) => R, options?: ClientFunctionOptions): ClientFunction<R, A>
        }

        interface ClientScript {
            content?: string;
            path?: string;
            page?: any;
        }

        interface TextRectangle {
            /**
             * Y-coordinate, relative to the viewport origin, of the bottom of the rectangle box.
             */
            bottom: number;
            /**
             * X-coordinate, relative to the viewport origin, of the left of the rectangle box.
             */
            left: number;
            /**
             *    X-coordinate, relative to the viewport origin, of the right of the rectangle box.
             */
            right: number;
            /**
             * Y-coordinate, relative to the viewport origin, of the top of the rectangle box.
             */
            top: number;
            /**
             * Width of the rectangle box (This is identical to `right` minus `left`).
             */
            width: number;
            /**
             * Height of the rectangle box (This is identical to `bottom` minus `top`).
             */
            height: number;
        }

        interface NodeSnapshot {
            /**
             * The number of child HTML elements.
             */
            childElementCount: number;
            /**
             * The number of child nodes.
             */
            childNodeCount: number;
            /**
             * `true` if this node has child HTML elements.
             */
            hasChildElements: boolean;
            /**
             * `true` if this node has child nodes.
             */
            hasChildNodes: boolean;
            /**
             * The type of the node.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
             */
            nodeType: number;
            /**
             * The text content of the node and its descendants.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent
             */
            textContent: string;
            /**
             * Attributes of the element.
             */
            attributes?: {[name: string]: string};
            /**
             * The size of the element and its position relative to the viewport.
             */
            boundingClientRect?: TextRectangle;
            /**
             * For checkbox and radio input elements, their current state. For other elements, `undefined`.
             */
            checked?: boolean | undefined;
            /**
             * The list of element's classes.
             */
            classNames?: string[];
            /**
             * The inner height of the element, including padding but not the horizontal scrollbar height, border, or margin.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/clientHeight
             */
            clientHeight?: number;
            /**
             * The width of the left border of the element.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/clientLeft
             */
            clientLeft?: number;
            /**
             * The width of the top border of the element.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/clientTop
             */
            clientTop?: number;
            /**
             * The inner width of the element, including padding but not the vertical scrollbar width, border, or margin.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/clientWidth
             */
            clientWidth?: number;
            /**
             * `true` if the element is focused.
             */
            focused?: boolean;
            /**
             * The element's identifier.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/id
             */
            id?: string;
            /**
             * The element's text content "as rendered".
             * See https://html.spec.whatwg.org/multipage/dom.html#the-innertext-idl-attribute
             */
            innerText?: string;
            /**
             * The namespace URI of the element. If the element does not have a namespace, this property is set to null.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/namespaceURI
             */
            namespaceURI?: string | null;
            /**
             * The height of the element including vertical padding and borders.
             * See https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/offsetHeight
             */
            offsetHeight?: number;
            /**
             * The number of pixels that the upper left corner of the element is offset by to the left within the `offsetParent` node.
             * See https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/offsetLeft
             */
            offsetLeft?: number;
            /**
             * The number of pixels that the upper left corner of the element is offset by to the top within the offsetParent node.
             * See https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/offsetTop
             */
            offsetTop?: number;
            /**
             * The width of the element including vertical padding and borders.
             * See https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/offsetWidth
             */
            offsetWidth?: number;
            /**
             * Indicates that `<option>` element is currently selected. For other elements, `undefined`.
             */
            selected?: boolean | undefined;
            /**
             *    For `<select>` element, the index of the first selected `<option>` element. For other elements, `undefined`.
             */
            selectedIndex?: number | undefined;
            /**
             * The height of the element's content, including content not visible on the screen due to overflow.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollHeight
             */
            scrollHeight?: number;
            /**
             * The number of pixels that the element's content is scrolled to the left.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollLeft
             */
            scrollLeft?: number;
            /**
             * The number of pixels that the element's content is scrolled upward.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollTop
             */
            scrollTop?: number;
            /**
             * Either the width in pixels of the element's content or the width of the element itself, whichever is greater.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollWidth
             */
            scrollWidth?: number;
            /**
             * The computed values of element's CSS properties.
             */
            style?: {[prop: string]: string};
            /**
             * The name of the element.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/tagName
             */
            tagName?: string;
            /**
             * For input elements, the current value in the control. For other elements, `undefined`.
             */
            value?: string | undefined;
            /**
             * `true` if the element is visible.
             */
            visible?: boolean;
            /**
             * `true` if the element has the specified class name.
             *
             * @param className - Name of the class.
             */
            hasClass?(className: string): boolean;
            /**
             * Returns the computed value of the CSS property.
             *
             * @param propertyName - The name of the CSS property.
             */
            getStyleProperty?(propertyName: string): string;
            /**
             *    Returns the value of the attribute.
             *
             * @param attributeName - The name of the attribute.
             */
            getAttribute?(attributeName: string): string;
            /**
             * Returns the value of the property from the `boundingClientRect` object.
             *
             * @param propertyName - The name of the property.
             */
            getBoundingClientRectProperty?(propertyName: string): number;
            /**
             * `true` if the element has the attribute.
             *
             * @param attributeName - The name of the attribute.
             */
            hasAttribute?(attributeName: string): boolean;
        }

        // Request Hook
        //----------------------------------------------------------------------------------------------------------------------

        interface RequestHook {
            /**
             * The `onRequest` method is called before sending the request.
             */
            onRequest(requestEvent: object): Promise<void>;

            /**
             * The `onResponse` method is called after sending the request
             */
            onResponse(responseEvent: object): Promise<void>;
        }

        interface RequestHookConstructor {
            /**
             * Creates a request hook
             * @param requestFilterRules - determines which requests the hook handles
             * @param responseEventConfigureOpts - defines whether to pass the response headers and body to the onResponse method
             * @returns {RequestHook}
             */
            new (requestFilterRules?: Array<any>, responseEventConfigureOpts?: object): RequestHook;
        }

        // Request Logger
        //----------------------------------------------------------------------------------------------------------------------

        interface RequestLoggerOptions {
            /**
             *  Specifies whether the request headers should be logged.
             */
            logRequestHeaders?: boolean;
            /**
             * Specifies whether the request body should be logged.
             */
            logRequestBody?: boolean;
            /**
             * Specifies whether the request body should be stored as a String or a Buffer.
             */
            stringifyRequestBody?: boolean;
            /**
             * Specifies whether the response headers should be logged.
             */
            logResponseHeaders?: boolean;
            /**
             * Specifies whether the response body should be logged.
             */
            logResponseBody?: boolean;
            /**
             * Specifies whether the response body should be stored as a string or a Buffer.
             */
            stringifyResponseBody?: boolean;
        }

        interface LoggedRequest {
            /**
             * The user agent that sent the request.
             */
            userAgent: string;
            /**
             * The request part of the logged request
             */
            request: RequestData;
            /**
             * The response part of the logged request
             */
            response: ResponseData;
        }

        interface RequestData {
            /**
             * The URL where the request is sent.
             */
            url: string;
            /**
             * The request's HTTP method.
             */
            method: string;
            /**
             * Request headers in the property-value form. Logged if the `logRequestHeaders` option is set to `true`.
             */
            headers: object;
            /**
             * The response body. Logged if the `logResponseBody` option is set to `true`.
             * A [Buffer](https://nodejs.org/api/buffer.html) or string depending on the `stringifyResponseBody` option.
             */
            body: string | any;
        }

        interface ResponseData {
            /**
             * The status code received in the response.
             */
            statusCode: number;
            /**
             * Response headers in the property-value form. Logged if the `logResponseHeaders` option is set to true.
             */
            headers: object;
            /**
             * The response body.
             * Logged if the `logResponseBody` option is set to true.
             * A Buffer or string depending on the `stringifyResponseBody` option.
             */
            body: string | any;
        }

        interface RequestLogger extends RequestHook {
            /**
             * Returns whether the logger contains a request that matches the predicate.
             * @param predicate - The predicate
             */
            contains(predicate: (request: LoggedRequest) => boolean): Promise<boolean>;
            /**
             * Returns the number of requests that match the predicate.
             * @param predicate - The predicate
             */
            count(predicate: (request: LoggedRequest) => boolean): Promise<number>;
            /**
             * Clears all logged requests.
             */
            clear(): void;
            /**
             * Returns an array of logged requests.
             */
            requests: Array<LoggedRequest>;
        }

        interface RequestLoggerFactory {
            (
                filter?: string | RegExp | object | ((req: any) => boolean),
                options?: RequestLoggerOptions
            ): RequestLogger;
        }

        // Request Mock
        //----------------------------------------------------------------------------------------------------------------------

        interface RequestMock {
            /**
             * Specifies requests to intercept
             * @param filter - Specifies which requests should be mocked with a response that follows in the `respond` method.
             */
            onRequestTo(filter: string | RegExp | object | ((req: any) => boolean)): RequestMock;
            /**
             * Specifies the mocked response.
             * @param body - The mocked response body.
             * @param statusCode - The response status code.
             * @param headers - Custom headers added to the response in the property-value form.
             */
            respond(body?: object | string | ((req: any, res: any) => any), statusCode?: number, headers?: object): RequestMock;
        }

        interface RequestMockFactory {
            (): RequestMock;
        }

        interface Role {

        }

        interface RoleOptions {
            /**
             * Use this option to control which page is opened after you switch to the role.
             *
             * By default, TestCafe navigates back to the page that was opened previously to switching to the role.
             * Set the `preserveUrl` option to true to save the URL to which the browser was redirected after logging in.
             * TestCafe will navigate to the saved URL each time after you switch to this role.
             *
             * This option is useful if you store session-related data (like session ID) in the URL.
             */
            preserveUrl?: boolean;
        }

        interface RoleFactory {
            (url: String, fn: (t: TestController) => Promise<any>, options?: RoleOptions): Role;
            /**
             * Creates an anonymous user role.
             */
            anonymous(): Role;
        }

        interface SelectorOptions {
            /**
             * If you need to call a selector from a Node.js callback, assign the current test
             * controller to the `boundTestRun` option.
             */
            boundTestRun?: TestController;
            /**
             * The amount of time, in milliseconds, allowed for an element returned by the
             * selector to appear in the DOM before the test fails.
             */
            timeout?: number;
            /**
             * Use this option to pass functions, variables or objects to selectors initialized with a function.
             * The `dependencies` object's properties are added to the function's scope as variables.
             */
            dependencies?: {[key: string]: any};
            /**
             * `true` to additionally require the returned element to become visible within `options.timeout`.
             */
            visibilityCheck?: boolean;
        }

        interface SelectorAPI {
            /**
             * The number of child HTML elements.
             */
            childElementCount: Promise<number>;
            /**
             * The number of child nodes.
             */
            childNodeCount: Promise<number>;
            /**
             * `true` if this node has child HTML elements.
             */
            hasChildElements: Promise<boolean>;
            /**
             * `true` if this node has child nodes.
             */
            hasChildNodes: Promise<boolean>;
            /**
             * The type of the node.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
             */
            nodeType: Promise<number>;
            /**
             * The text content of the node and its descendants.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent
             */
            textContent: Promise<string>;
            /**
             * Attributes of the element.
             */
            attributes: Promise<{[name: string]: string}>;
            /**
             * The size of the element and its position relative to the viewport.
             */
            boundingClientRect: Promise<TextRectangle>;
            /**
             * For checkbox and radio input elements, their current state. For other elements, `undefined`.
             */
            checked: Promise<boolean | undefined>;
            /**
             * The list of element's classes.
             */
            classNames: Promise<string[]>;
            /**
             * The inner height of the element, including padding but not the horizontal scrollbar height, border, or margin.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/clientHeight
             */
            clientHeight: Promise<number>;
            /**
             * The width of the left border of the element.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/clientLeft
             */
            clientLeft: Promise<number>;
            /**
             * The width of the top border of the element.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/clientTop
             */
            clientTop: Promise<number>;
            /**
             * The inner width of the element, including padding but not the vertical scrollbar width, border, or margin.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/clientWidth
             */
            clientWidth: Promise<number>;
            /**
             * `true` if the element is focused.
             */
            focused: Promise<boolean>;
            /**
             * The element's identifier.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/id
             */
            id: Promise<string>;
            /**
             * The element's text content "as rendered".
             * See https://html.spec.whatwg.org/multipage/dom.html#the-innertext-idl-attribute
             */
            innerText: Promise<string>;
            /**
             *    The namespace URI of the element. If the element does not have a namespace, this property is set to null.
             *    See https://developer.mozilla.org/en-US/docs/Web/API/Element/namespaceURI
             */
            namespaceURI: Promise<string | null>;
            /**
             * The height of the element including vertical padding and borders.
             * See https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/offsetHeight
             */
            offsetHeight: Promise<number>;
            /**
             * The number of pixels that the upper left corner of the element is offset by to the left within the `offsetParent` node.
             * See https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/offsetLeft
             */
            offsetLeft: Promise<number>;
            /**
             * The number of pixels that the upper left corner of the element is offset by to the top within the offsetParent node.
             * See https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/offsetTop
             */
            offsetTop: Promise<number>;
            /**
             * The width of the element including vertical padding and borders.
             * See https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/offsetWidth
             */
            offsetWidth: Promise<number>;
            /**
             * Indicates that `<option>` element is currently selected. For other elements, `undefined`.
             */
            selected: Promise<boolean | undefined>;
            /**
             *    For `<select>` element, the index of the first selected `<option>` element. For other elements, `undefined`.
             */
            selectedIndex: Promise<number | undefined>;
            /**
             * The height of the element's content, including content not visible on the screen due to overflow.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollHeight
             */
            scrollHeight: Promise<number>;
            /**
             * The number of pixels that the element's content is scrolled to the left.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollLeft
             */
            scrollLeft: Promise<number>;
            /**
             * The number of pixels that the element's content is scrolled upward.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollTop
             */
            scrollTop: Promise<number>;
            /**
             * Either the width in pixels of the element's content or the width of the element itself, whichever is greater.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollWidth
             */
            scrollWidth: Promise<number>;
            /**
             * The computed values of element's CSS properties.
             */
            style: Promise<{[prop: string]: string}>;
            /**
             * The name of the element.
             * See https://developer.mozilla.org/en-US/docs/Web/API/Element/tagName
             */
            tagName: Promise<string>;
            /**
             * For input elements, the current value in the control. For other elements, `undefined`.
             */
            value: Promise<string | undefined>;
            /**
             * `true` if the element is visible.
             */
            visible: Promise<boolean>;
            /**
             * `true` if the element has the specified class name.
             *
             * @param className - The name of the class.
             */
            hasClass(className: string): Promise<boolean>;
            /**
             * Returns the computed value of the CSS property.
             *
             * @param propertyName - The name of the CSS property.
             */
            getStyleProperty(propertyName: string): Promise<string>;
            /**
             *    Returns the value of the attribute.
             *
             * @param attributeName - The name of the attribute.
             */
            getAttribute(attributeName: string): Promise<string>;
            /**
             * Returns the value of the property from the `boundingClientRect` object.
             *
             * @param propertyName - The name of the property.
             */
            getBoundingClientRectProperty(propertyName: string): Promise<number>;
            /**
             * `true` if the element has the attribute.
             *
             * @param attributeName - The name of the attribute.
             */
            hasAttribute(attributeName: string): Promise<boolean>;
            /**
             * Creates a selector that returns an element by its index in the matching set.
             *
             * @param index - A zero-based index of the element. If negative, then counted from the end of the matching set.
             */
            nth(index: number): Selector;
            /**
             * Creates a selector that filters a matching set by the specified text.
             *
             * @param text - The text in the element.
             */
            withText(text: string): Selector;
            /**
             * Creates a selector that filters a matching set using the specified regular expression.
             *
             * @param re - The regular expression for the text in the element.
             */
            withText(re: RegExp): Selector;
            /**
             * Creates a selector that filters a matching set by the specified text. Selects elements whose text content *strictly matches* this text.
             *
             * @param text - The text in the element.
             */
            withExactText(text: string): Selector;
            /**
             * Creates a selector that filters a matching set by the specified attribute and, optionally, attribute value.
             *
             * @param attrName - The attribute name.
             * @param attrValue - The attribute value.You can omit this parameter to select elements that have
             * the `attrName` attribute regardless of the value.
             */
            withAttribute(attrName: string | RegExp, attrValue?: string | RegExp): Selector;
            /**
             * Creates a selector that filters a matching set by cssSelector.
             *
             * @param cssSelector - A CSS selector string.
             */
            filter(cssSelector: string): Selector;
            /**
             * Creates a selector that filters a matching set by the `filterFn` predicate.
             *
             * @param filterFn - The predicate.
             * @param filterFn `node` - The current DOM node.
             * @param filterFn `idx` - Index of the current node among other nodes in the matching set.
             * @param dependencies - Predicate dependencies.
             */
            filter(filterFn: (node: Element, idx: number) => boolean,
                   dependencies?: {[key: string]: any}): Selector;
            /**
             * Creates a selector that filters a matching set leaving only visible elements.
             */
            filterVisible(): Selector;
            /**
             * Creates a selector that filters a matching set leaving only hidden elements.
             */
            filterHidden(): Selector;
            /**
             * Finds all descendants of all nodes in the matching set and filters them by `cssSelector`.
             *
             * @param cssSelector - A CSS selector string.
             */
            find(cssSelector: string): Selector;
            /**
             * Finds all descendants of all nodes in the matching set and filters them using `filterFn` predicate.
             *
             * @param filterFn - The predicate.
             * @param filterFn `node` - The current descendant node.
             * @param filterFn `idx` - A zero-based index of `node` among other descendant nodes.
             * @param filterFn `originNode` - A node from the left-hand selector's matching set whose descendants are being iterated.
             * @param dependencies - Predicate dependencies.
             */
            find(filterFn: (node: Element, idx: number, originNode: Element) => boolean,
                 dependencies?: {[key: string]: any}): Selector;
            /**
             * Finds all parents of all nodes in the matching set (first element in the set will be the closest parent).
             */
            parent(): Selector;
            /**
             * Finds all parents of all nodes in the matching set and filters them by `index`.
             *
             * @param index - A zero-based index of the parent (0 is the closest). If negative, then counted from the end of the matching set.
             */
            parent(index: number): Selector;
            /**
             * Finds all parents of all nodes in the matching set and filters them by `cssSelector`.
             *
             * @param cssSelector - A CSS selector string.
             */
            parent(cssSelector: string): Selector;
            /**
             * Finds all parents of all nodes in the matching set and filters them by the `filterFn` predicate.
             *
             * @param filterFn - The predicate.
             * @param filterFn `node` - The current parent node.
             * @param filterFn `idx` - A zero-based index of `node` among other parent nodes.
             * @param filterFn `originNode` - A node from the left-hand selector's matching set whose parents are being iterated.
             * @param dependencies - Predicate dependencies.
             */
            parent(filterFn: (node: Element, idx: number, originNode: Element) => boolean,
                   dependencies?: {[key: string]: any}): Selector;
            /**
             * Finds all child elements (not nodes) of all nodes in the matching set.
             */
            child(): Selector;
            /**
             * Finds all child elements (not nodes) of all nodes in the matching set and filters them by `index`.
             *
             * @param index - A zero-based index of the child. If negative, then counted from the end of the matching set.
             */
            child(index: number): Selector;
            /**
             * Finds all child elements (not nodes) of all nodes in the matching set and filters them by `cssSelector`.
             *
             * @param cssSelector - A CSS selector string.
             */
            child(cssSelector: string): Selector;
            /**
             * Finds all child elements (not nodes) of all nodes in the matching set and filters them by the `filterFn` predicate.
             *
             * @param filterFn - The predicate.
             * @param filterFn `node` - The current child node.
             * @param filterFn `idx` - A zero-based index of `node` among other child nodes.
             * @param filterFn `originNode` - A node from the left-hand selector's matching set children parents are being iterated.
             * @param dependencies - Predicate dependencies.
             */
            child(filterFn: (node: Element, idx: number, originNode: Element) => boolean,
                  dependencies?: {[key: string]: any}): Selector;
            /**
             * Finds all sibling elements (not nodes) of all nodes in the matching set.
             */
            sibling(): Selector;
            /**
             * Finds all sibling elements (not nodes) of all nodes in the matching set and filters them by `index`.
             *
             * @param index -  a zero-based index of the sibling. If negative, then counted from the end of the matching set.
             */
            sibling(index: number): Selector;
            /**
             * nds all sibling elements (not nodes) of all nodes in the matching set and filters them by `cssSelector`.
             *
             * @param cssSelector - A CSS selector string.
             */
            sibling(cssSelector: string): Selector;
            /**
             * Finds all sibling elements (not nodes) of all nodes in the matching set and filters them by the `filterFn` predicate.
             *
             * @param filterFn - The predicate.
             * @param filterFn `node` - The current sibling node.
             * @param filterFn `idx` - A zero-based index of `node` among other sibling nodes.
             * @param filterFn `originNode` - A node from the left-hand selector's matching set whose siblings are being iterated.
             * @param dependencies - Predicate dependencies.
             */
            sibling(filterFn: (node: Element, idx: number, originNode: Element) => boolean,
                    dependencies?: {[key: string]: any}): Selector;
            /**
             * Finds all succeeding sibling elements (not nodes) of all nodes in the matching set.
             */
            nextSibling(): Selector;
            /**
             * Finds all succeeding sibling elements (not nodes) of all nodes in the matching set and filters them by `index`.
             *
             * @param index - A zero-based index of the succeeding sibling. If negative, then counted from the end of the matching set.
             */
            nextSibling(index: number): Selector;
            /**
             * Finds all succeeding sibling elements (not nodes) of all nodes in the matching set and filters them by `cssSelector`.
             *
             * @param cssSelector - A CSS selector string.
             */
            nextSibling(cssSelector: string): Selector;
            /**
             * Finds all succeeding sibling elements (not nodes) of all nodes in the matching set and filters them by the `filterFn` predicate.
             *
             * @param filterFn - The predicate.
             * @param filterFn `node` - The current succeeding sibling node.
             * @param filterFn `idx` - A zero-based index of `node` among other succeeding sibling nodes.
             * @param filterFn `originNode` - A node from the left-hand selector's matching set whose succeeding siblings are being iterated.
             * @param dependencies - Predicate dependencies.
             */
            nextSibling(filterFn: (node: Element, idx: number, originNode: Element) => boolean,
                        dependencies?: {[key: string]: any}): Selector;
            /**
             * Finds all preceding sibling elements (not nodes) of all nodes in the matching set.
             */
            prevSibling(): Selector;
            /**
             *  Finds all preceding sibling elements (not nodes) of all nodes in the matching set and filters them by `index`.
             *
             * @param index - A zero-based index of the preceding sibling. If negative, then counted from the end of the matching set.
             */
            prevSibling(index: number): Selector;
            /**
             * Finds all preceding sibling elements (not nodes) of all nodes in the matching set and filters them by `cssSelector`.
             *
             * @param cssSelector - A CSS selector string.
             */
            prevSibling(cssSelector: string): Selector;
            /**
             * Finds all preceding sibling elements (not nodes) of all nodes in the matching set and filters them by the `filterFn` predicate.
             *
             * @param filterFn - The predicate.
             * @param filterFn `node` - The current preceding sibling node.
             * @param filterFn `idx` - A zero-based index of `node` among other preceding sibling nodes.
             * @param filterFn `originNode` - A node from the left-hand selector's matching set whose preceding siblings are being iterated.
             * @param dependencies - Predicate dependencies.
             */
            prevSibling(filterFn: (node: Element, idx: number, originNode: Element) => boolean,
                        dependencies?: {[key: string]: any}): Selector;
            /**
             * `true if` at least one matching element exists.
             */
            exists: Promise<boolean>;
            /**
             * The number of matching elements.
             */
            count: Promise<number>;
            /**
             *  Adds custom selector properties.
             *
             * @param props - Property descriptors.
             * @param props `prop` - Property name.
             * @param props `[prop]` - The function that calculate property values. Executed on the client side in the browser.
             * @param props `node` - The matching DOM node for which custom property is calculated.
             */
            addCustomDOMProperties(props: {[prop: string]: (node: Element) => any}): Selector;
            /**
             * Adds custom selector methods.
             *
             * @param methods - Method descriptors.
             * @param methods `method` - The method name.
             * @param methods `[method]` - The function that contains method code. Executed on the client side in the browser.
             * @param methods `node` - The matching DOM node for which custom method is executed.
             * @param methods `methodParams` - Custom method parameters.
             */
            addCustomMethods(methods: {[method: string]: (node: Element, ...methodParams: any[]) => any }, opts?: {returnDOMNodes?: boolean}): Selector;
            /**
             * Returns a new selector with a different set of options that includes options from the
             * original selector and new `options` that overwrite the original ones.
             *
             * @param options - New options.
             */
            with(options?: SelectorOptions): Selector;
        }

        interface Selector extends SelectorAPI {
            /**
             * Creates parametrized selector.
             *
             * @param args - Selector parameters.
             */
            (...args: any[]): SelectorPromise;
        }

        interface SelectorPromise extends SelectorAPI, Promise<NodeSnapshot> {
        }

        interface SelectorFactory {
            (
                init:
                    | string
                    | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection)
                    | Selector
                    | NodeSnapshot
                    | SelectorPromise,
                options?: SelectorOptions
            ): Selector;
        }

        interface HTTPAuthCredentials {
            /**
             * The user name for the account.
             */
            username: string;
            /**
             * The password for the account.
             */
            password: string;
            /**
             * The domain name.
             */
            domain?: string;
            /**
             * The workstation's ID in the local network.
             */
            workstation?: string;
        }

        interface FixtureFn {
            /**
             * Declares a test fixture.
             *
             * @param name - The name of the fixture.
             * @param tagArgs - tag function arguments required to support the "fixture`${x}`" syntax
             */
            (name: string | TemplateStringsArray, ...tagArgs: any[]): this;
            /**
             * Specifies a webpage at which all tests in a fixture start.
             *
             * @param url - The URL of the webpage where tests start.
             * @param tagArgs - tag function arguments required to support the "fixture.page`${x}`" syntax
             * To test webpages in local directories, you can use the `file://` scheme or relative paths.
             */
            page(url: string | TemplateStringsArray, ...tagArgs: any[]): this;
            /**
             * Specifies HTTP Basic or Windows (NTLM) authentication credentials for all tests in the fixture.
             *
             * @param credentials - Contains credentials used for authentication.
             */
            httpAuth(credentials: HTTPAuthCredentials): this;
            /**
             * Specifies the fixture hook that is executed before the start of the first test in the fixture.
             *
             * @param fn - An asynchronous hook function that contains initialization or clean-up code.
             * @param fn `ctx` - A fixture context object used to share variables between fixture hooks and test code.
             */
            before(fn: (ctx: {[key: string]: any}) => Promise<any>): this;
            /**
             * Specifies the fixture hook that is executed after the end of the last test in the fixture.
             *
             * @param fn - An asynchronous hook function that contains initialization or clean-up code.
             * @param fn `ctx` - A fixture context object used to share variables between fixture hooks and test code.
             */
            after(fn: (ctx: {[key: string]: any}) => Promise<any>): this;
            /**
             * Specifies the hook that is executed on the start of each test in the fixture.
             *
             * @param fn - An asynchronous hook function that contains initialization or clean-up code.
             * @param fn `t` - The test controller used to access test run API.
             */
            beforeEach(fn: (t: TestController) => Promise<any>): this;
            /**
             * Specifies the hook that is executed on the end of each test in the fixture.
             *
             * @param fn - An asynchronous hook function that contains initialization or clean-up code.
             * @param fn `t` - The test controller used to access test run API.
             */
            afterEach(fn: (t: TestController) => Promise<any>): this;
            /**
             * Skips execution of all tests in the fixture.
             */
            skip: this;
            /**
             * Skips execution of all tests, except whose that are in this fixture.
             */
            only: this;
            /**
             * Specifies the additional information for all tests in the fixture. This information can be used in reports.
             *
             * @param key - The name of the metadata entry
             * @param value - The value of the metadata entry
             */
            meta(key: string, value: string): this;
            /**
             * Specifies the additional information for all tests in the fixture. This information can be used in reports.
             *
             * @param data - Key-value pairs
             */
            meta(data: object): this;
            /**
             * Attaches hooks to all tests in the fixture
             *
             * @param hooks - The set of the RequestHook subclasses
             */
            requestHooks(...hooks: object[]): this;
            /**
             * Injects scripts into pages visited during the fixture execution.
             *
             * @param scripts - Scripts that should be added to the tested pages.
             */
            clientScripts (scripts: ClientScript | ClientScript[]): this;
        }

        interface TestFn {
            /**
             * Declares a test.
             *
             * @param name - The name of the test.
             * @param fn - An asynchronous function that contains test code.
             * @param fn `t` - The test controller used to access test run API.
             */
            (name: string, fn: (t: TestController) => Promise<any>): this;
            /**
             * Specifies a webpage at which test starts.
             *
             * @param url - The URL of the webpage at which this test starts.
             * To test webpages in local directories, you can use the `file://` scheme or relative paths.
             */
            page(url: string): this;
            /**
             * Specifies HTTP Basic or Windows (NTLM) authentication credentials for the test.
             *
             * @param credentials - Contains credentials used for authentication.
             */
            httpAuth(credentials: HTTPAuthCredentials): this;
            /**
             * Specifies hook that is executed on the start of the test.
             *
             * @param fn - An asynchronous hook function that contains initialization or clean-up code.
             * @param fn `t` - The test controller used to access test run API.
             */
            before(fn: (t: TestController) => Promise<any>): this;
            /**
             * Specifies hook that is executed on the end of the test.
             *
             * @param fn - An asynchronous hook function that contains initialization or clean-up code.
             * @param fn `t` - The test controller used to access test run API.
             */
            after(fn: (t: TestController) => Promise<any>): this;
            /**
             * Skips test execution.
             */
            skip: this;
            /**
             * Skips execution of all tests, except this one.
             */
            only: this;
            /**
             * Specifies the additional information for the test. This information can be used in reports.
             *
             * @param key - The name of the metadata entry
             * @param value - The value of the metadata entry
             */
            meta(key: string, value: string): this;
            /**
             * Specifies the additional information for the test. This information can be used in reports.
             *
             * @param data - Key-value pairs
             */
            meta(data: object): this;
            /**
             * Attaches hooks to the test
             *
             * @param hooks - The set of the RequestHook subclasses
             */
            requestHooks(...hooks: object[]): this;
            /**
             * Injects scripts into pages visited during the test execution.
             *
             * @param scripts - Scripts that should be added to the tested pages.
             */
            clientScripts (scripts: ClientScript | ClientScript[]): this;
        }

        interface NativeDialogHistoryItem {
            /**
             * The type of the native dialog.
             */
            type: 'alert' | 'confirm' | 'beforeunload' | 'prompt';
            /**
             * Text of the dialog message.
             */
            text: string;
            /**
             * The URL of the page that invoked the dialog. Use it to determine if the dialog originated
             * from the main window or an `<iframe>`.
             */
            url: string;
        }

        interface BrowserConsoleMessages {
            /**
             * Messages output to the browser console by the console.log() method.
             */
            log: string[];
            /**
             * Warning messages output to the browser console by the console.warn() method.
             */
            warn: string[];
            /**
             * Error messages output to the browser console by the console.error() method.
             */
            error: string[];
            /**
             * Information messages output to the browser console by the console.info() method.
             */
            info: string[];
        }

        interface Browser {
            /**
             * The browser alias string specified when tests were launched.
             */
            alias: string;
            /**
             * The browser name.
             */
            name: string;
            /**
             * The browser version.
             */
            version: string;
            /**
             * The platform type.
             */
            platform: string;
            /**
             * `true` if the browser runs in headless mode.
             */
            headless: boolean;
            /**
             * The name and version of the operating system.
             */
            os: { name: string; version: string };
            /**
             * The name and version of the browser engine.
             */
            engine: { name: string; version: string };
            /**
             * The user agent string.
             */
            userAgent: string;
            /**
             * Formatted string with the browser's and operating system's name and version.
             */
            prettyUserAgent: string;
        }

        interface TestController {
            /**
             * Dictionary that is shared between test hook functions and test code.
             */
            ctx: {[key: string]: any};
            /**
             * Dictionary that is shared between `fixture.before` and `fixture.after`, test hook functions and test code.
             */
            readonly fixtureCtx: {[key: string]: any};
            /**
             * Returns an object that contains browser information.
             */
            readonly browser: Browser;
            /**
             * Clicks a webpage element.
             *
             * @param selector - Identifies the webpage element being clicked.
             * @param options - A set of options that provide additional parameters for the action.
             */
            click(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                  options?: ClickActionOptions): TestControllerPromise;
            /**
             * Right-clicks a webpage element.
             *
             * @param selector - Identifies the webpage element being right-clicked.
             * @param options - A set of options that provide additional parameters for the action.
             */
            rightClick(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                       options?: ClickActionOptions): TestControllerPromise;
            /**
             * Double-clicks a webpage element.
             *
             * @param selector - Identifies the webpage element being double-clicked.
             * @param options - A set of options that provide additional parameters for the action.
             */
            doubleClick(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                        options?: ClickActionOptions): TestControllerPromise;
            /**
             * Hovers the mouse pointer over a webpage element.
             *
             * @param selector - Identifies the webpage element being hovered over.
             * @param options - A set of options that provide additional parameters for the action.
             */
            hover(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                  options?: MouseActionOptions): TestControllerPromise;
            /**
             * Drags an element by an offset.
             *
             * @param selector - Identifies the webpage element being dragged
             * @param dragOffsetX - An X-offset of the drop coordinates from the mouse pointer's initial position.
             * @param dragOffsetY - An Y-offset of the drop coordinates from the mouse pointer's initial position.
             * @param options - A set of options that provide additional parameters for the action.
             */
            drag(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                 dragOffsetX: number,
                 dragOffsetY: number,
                 options?: MouseActionOptions): TestControllerPromise;
            /**
             * Drags an element onto another one.
             *
             * @param selector - Identifies the webpage element being dragged.
             * @param destinationSelector - Identifies the webpage element that serves as the drop location.
             * @param options - A set of options that provide additional parameters for the action.
             */
            dragToElement(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                          destinationSelector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                          options?: DragToElementOptions): TestControllerPromise;
            /**
             * Types the specified text into an input element.
             *
             * @param selector - Identifies the webpage element that will receive input focus.
             * @param text - The text to be typed into the specified webpage element.
             * @param options - A set of options that provide additional parameters for the action.
             */
            typeText(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                     text: string,
                     options?: TypeActionOptions): TestControllerPromise;
            /**
             * Selects text in input elements.
             *
             * @param selector - Identifies the webpage element whose text will be selected.
             * @param startPos - The start position of the selection. A zero-based integer.
             * @param endPos - The end position of the selection. A zero-based integer.
             * @param options - A set of options that provide additional parameters for the action.
             */
            selectText(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                       startPos?: number,
                       endPos?: number,
                       options?: ActionOptions): TestControllerPromise;
            /**
             * Selects `<textarea>` content.
             *
             * @param selector
             * @param startLine
             * @param startPos
             * @param endLine
             * @param endPos
             * @param options
             */
            selectTextAreaContent(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                                  startLine?: number,
                                  startPos?: number,
                                  endLine?: number,
                                  endPos?: number,
                                  options?: ActionOptions): TestControllerPromise;
            /**
             * Performs selection within editable content
             *
             * @param startSelector - Identifies a webpage element from which selection starts. The start position of selection is the first character of the element's text.
             * @param endSelector - Identifies a webpage element at which selection ends. The end position of selection is the last character of the element's text.
             * @param options - A set of options that provide additional parameters for the action.
             */
            selectEditableContent(startSelector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                                  endSelector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                                  options?: ActionOptions): TestControllerPromise;
            /**
             * Presses the specified keyboard keys.
             *
             * @param keys - The sequence of keys and key combinations to be pressed.
             * @param options - A set of options that provide additional parameters for the action.
             */
            pressKey(keys: string, options?: ActionOptions): TestControllerPromise;
            /**
             * Pauses a test for a specified period of time.
             *
             * @param timeout - The pause duration, in milliseconds.
             */
            wait(timeout: number): TestControllerPromise;
            /**
             * Navigates to the specified URL.
             *
             * @param url - The URL to navigate to. Absolute or relative to the current page.
             * You can use the `file://` scheme or relative paths to navigate to a webpage in a local directory.
             */
            navigateTo(url: string): TestControllerPromise;
            /**
             * Populates the specified file upload input with file paths.
             *
             * @param selector - Identifies the input field to which file paths are written.
             * @param filePath - The path to the uploaded file, or several such paths. Relative paths resolve from the folder with the test file.
             */
            setFilesToUpload(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                             filePath: String | String[]): TestControllerPromise;
            /**
             * Removes all file paths from the specified file upload input.
             *
             * @param selector - Identifies the input field that needs to be cleared.
             */
            clearUpload(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection)): TestControllerPromise;
            /**
             * Takes a screenshot of the tested page.
             *
             * @param path - relative path to the screenshot file. Resolved from the screenshot directory specified by
             * using the `runner.screenshots` API method or the `screenshots-path` command line option.
             * If path doesn't have .png extension, it will be added automatically.
             */
            takeScreenshot(path?: string): TestControllerPromise;
            /**
             * Takes a screenshot of the tested page.
             *
             * @param options - TakeScreenshot Options
             */
            takeScreenshot(options: TakeScreenshotOptions): TestControllerPromise;
            /**
             * Takes a screenshot of the specified element.
             *
             * @param selector - Identifies the element for screenshot capturing.
             * @param path - relative path to the screenshot file. Resolved from the screenshot  directory specified by
             * using the `runner.screenshots` API method or the `screenshots-path` command line option.
             * If path doesn't have .png extension, it will be added automatically.
             */
            takeElementScreenshot(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection),
                                  path?:    string,
                                  options?: TakeElementScreenshotOptions): TestControllerPromise
            /**
             * Sets the browser window size.
             *
             * @param width - The new width, in pixels.
             * @param height - The new height, in pixels.
             */
            resizeWindow(width: number, height: number): TestControllerPromise;

            /**
             * Fits the browser window into a particular device.
             *
             * @param deviceName - The name of the device as listed at http://viewportsizes.com/.
             * @param options - Provide additional information about the device.
             */
            resizeWindowToFitDevice(deviceName: string, options?: ResizeToFitDeviceOptions): TestControllerPromise;
            /**
             * Maximizes the browser window.
             */
            maximizeWindow(): TestControllerPromise;
            /**
             * Switches the test's browsing context to the specified `<iframe>`.
             *
             * @param selector - Identifies an `<iframe>` on the tested page.
             */
            switchToIframe(selector: string | Selector | NodeSnapshot | SelectorPromise | ((...args: any[]) => Node | Node[] | NodeList | HTMLCollection)): TestControllerPromise;
            /**
             * Switches the test's browsing context from an `<iframe>` back to the main window.
             */
            switchToMainWindow(): TestControllerPromise;
            /**
             * Executes function on client and returns it's result.
             *
             * @param fn - A function to be executed on the client side.
             * @param options - Function options.
             */
            eval(fn: Function, options?: ClientFunctionOptions): Promise<any>;
            /**
             * Specifies handler function for the browser native dialogs.
             *
             * @param fn - A regular or client function that will be triggered whenever a native dialog is invoked. null to
             * remove the native dialog handler.
             * @param fn `type` - The type of the native dialog.
             * @param fn `text` - Text of the dialog message.
             * @param fn `url` - The URL of the page that invoked the dialog. Use it to determine if the dialog originated from
             * the main window or an `<iframe>`.
             * @param options - Handler options.
             */
            setNativeDialogHandler(fn: ((type: 'alert' | 'confirm' | 'beforeunload' | 'prompt', text: string, url: string) => any) | null,
                                   options?: ClientFunctionOptions): TestControllerPromise;
            /**
             * Returns a stack of history entries (i.e., an array in which the latest dialog has an index of 0). Each entry
             * corresponds to a certain native dialog that appears in the main window or in an `<iframe>`.
             */
            getNativeDialogHistory(): Promise<NativeDialogHistoryItem[]>;
            /**
             * Returns an object that contains messages output to the browser console.
             */
            getBrowserConsoleMessages(): Promise<BrowserConsoleMessages>;
            /**
             * Starts an assertion chain and specifies assertion actual value.
             *
             * @param actual - An actual value of the assertion.
             */
            expect<A>(actual: A | Promise<A>): Assertion<A>;
            /**
             * Pauses the test and switches to the step-by-step execution mode.
             */
            debug(): TestControllerPromise;
            /**
             * Specifies the speed of test execution.
             *
             * @param speed - Specifies the test speed. Must be a number between 1 (the fastest) and 0.01 (the slowest).
             */
            setTestSpeed(speed: number): TestControllerPromise;
            /**
             * Specifies the amount of time within which TestCafe waits for the `window.load` event to fire before starting the test.
             *
             * @param duration - Specifies the amount of time within which TestCafe waits for the `window.load` event to fire before starting the test.
             */
            setPageLoadTimeout(duration: number): TestControllerPromise;
            /**
             * Switches user role.
             *
             * @param role - The role you need to use further in the test.
             */
            useRole(role: Role): TestControllerPromise;
            /**
             * Attaches the hooks during a test run
             *
             * @param hooks - The set of RequestHook subclasses
             */
            addRequestHooks(...hooks: object[]): TestControllerPromise;
            /**
             * Detaches the hooks during a test run
             *
             * @param hooks - The set of RequestHook subclasses
             */
            removeRequestHooks(...hooks: object[]): TestControllerPromise;
        }

        interface TestControllerPromise extends TestController, Promise<any> {
        }

        type ElementOf<T> = T extends (infer E)[] ? E : never;
        type Extend<T, E> = T extends E ? E : never;
        type EnsureString<T> = T extends string ? string : never;

        /**
         * Creates a selector.
         *
         * @param init - Selector initializer.
         * @param options - Selector options.
         */
        export const Selector: SelectorFactory;

        /**
         * Creates a client function.
         *
         * @param fn - Function code.
         * @param options - Function options.
         */
        export const ClientFunction: ClientFunctionFactory;
    }
}