/**
 * Shared platform testing utilities following TypeScript best practices.
 *
 * These utilities eliminate the need for 'as any' assertions in platform detection tests
 * by providing type-safe mock objects and environment setup helpers.
 *
 * @module platformTestHelpers
 */
export interface NodeEnvironmentGlobals {
    readonly process: {
        readonly versions: {
            readonly node: string;
        };
    };
}
export interface BrowserEnvironmentGlobals {
    readonly window: Record<string, unknown>;
    readonly document: Record<string, unknown>;
}
/**
 * Type-safe platform environment manager for tests.
 *
 * This class provides methods to set up different platform environments
 * without using 'as any' assertions, following official TypeScript best practices.
 */
export declare class PlatformTestHelper {
    private readonly originalState;
    constructor();
    /**
     * Configure globals for Node.js environment detection
     *
     * @param nodeVersion - Node.js version string to use
     */
    setupNodeEnvironment(nodeVersion?: string): void;
    /**
     * Configure globals for browser environment detection
     */
    setupBrowserEnvironment(): void;
    /**
     * Configure ambiguous environment (should default to Node)
     */
    setupAmbiguousEnvironment(): void;
    /**
     * Set up browser environment with crypto support
     *
     * @param cryptoOverrides - Optional crypto properties to override
     */
    setupBrowserWithCrypto(cryptoOverrides?: Partial<Crypto>): void;
    /**
     * Set up Node environment with specific process properties
     *
     * @param processOverrides - Optional process properties to override
     */
    setupNodeWithProcess(processOverrides?: Partial<typeof process>): void;
    /**
     * Restore original global state
     */
    restore(): void;
    private captureOriginalState;
    private restoreGlobal;
    private clearNodeGlobals;
    private clearBrowserGlobals;
    private clearAllGlobals;
}
/**
 * Creates a type-safe mock crypto object for testing.
 *
 * @param overrides - Properties to override in the base mock crypto implementation
 * @returns A mock Crypto object with stubbed SubtleCrypto methods
 */
export declare function createMockCrypto(overrides?: Partial<Crypto>): Crypto;
/**
 * Creates a type-safe mock Node.js process object for testing.
 *
 * @param overrides - Properties to override in the base process mock
 * @returns A mock process object with platform, version, and environment information
 */
export declare function createMockProcess(overrides?: Partial<typeof process>): typeof process;
/**
 * Creates a type-safe mock Window object for browser testing.
 *
 * @param overrides - Properties to override in the base window mock
 * @returns A mock window object with document, location, and navigator properties
 */
export declare function createMockWindow(overrides?: Partial<Window>): Window & typeof globalThis;
/**
 * Creates a type-safe mock Document object for browser testing.
 *
 * @param overrides - Properties to override in the base document mock
 * @returns A mock document object with DOM manipulation methods
 */
export declare function createMockDocument(overrides?: Partial<Document>): Document;
/**
 * Utility for creating properly typed fetch mocks
 *
 * @returns A Vitest mock function typed as the global fetch function
 */
export declare function createMockFetch(): typeof fetch;
/**
 * Utility for stubbing globals with proper typing using Vitest
 */
export declare class VitestGlobalStubber {
    private stubs;
    stubGlobal<T>(name: string, value: T): void;
    restoreAllGlobals(): void;
}