---
id: MockRequest
title: MockRequest
---

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## MockRequest

**Extends Helper**

This helper allows to **mock requests while running tests in Puppeteer or WebDriver**.
For instance, you can block calls to 3rd-party services like Google Analytics, CDNs.
Another way of using is to emulate requests from server by passing prepared data.

### Installations

Requires [Polly.js][1] library by Netflix installed

    npm i @pollyjs/core @pollyjs/adapter-puppeteer --save-dev

Requires Puppeteer helper or WebDriver helper enabled

### Configuration

Just enable helper in config file:

```js
helpers: {
   Puppeteer: {
     // regular Puppeteer config here
   },
   MockRequest: {}
}
```

The same can be done when using WebDriver helper..

### Usage

Use `I.mockRequest` to intercept and mock requests.

### Parameters

-   `config`  

### _checkAndStartMocking

Starts mocking if it's not started yet.

### _connectPuppeteer

Creates a polly instance by registering puppeteer adapter with the instance

#### Parameters

-   `title` **any** 

### _connectWebDriver

Creates polly object in the browser window context using xhr and fetch adapters,
after loading PollyJs and adapter scripts.

#### Parameters

-   `title` **any** 

### mockRequest

Mock response status

```js
I.mockRequest('GET', '/api/users', 200);
I.mockRequest('ANY', '/secretsRoutes/*', 403);
I.mockRequest('POST', '/secrets', { secrets: 'fakeSecrets' });
I.mockRequest('GET', '/api/users/1', 404, 'User not found');
```

Multiple requests

```js
I.mockRequest('GET', ['/secrets', '/v2/secrets'], 403);
```

#### Parameters

-   `method` **[string][2]** request method. Can be `GET`, `POST`, `PUT`, etc or `ANY`.
-   `oneOrMoreUrls` **([string][2] | [Array][3]&lt;[string][2]>)** url(s) to mock. Can be exact URL, a pattern, or an array of URLs.
-   `dataOrStatusCode` **([number][4] | [string][2] | [object][5])** status code when number provided. A response body otherwise
-   `additionalData` **([string][2] | [object][5])** response body when a status code is set by previous parameter. 

### startMocking

Starts mocking of http requests.
Used by mockRequest method to automatically start
mocking requests.

#### Parameters

-   `title` **any**  

### stopMocking

Stops mocking requests.

[1]: https://netflix.github.io/pollyjs/#/

[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String

[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array

[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number

[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object