fetch-mock
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Comparing version 1.1.0 to 1.1.1
{ | ||
"name": "fetch-mock", | ||
"version": "1.1.0", | ||
"version": "1.1.1", | ||
"description": "Mock http requests made using fetch (or isomorphic-fetch)", | ||
@@ -5,0 +5,0 @@ "main": "server.js", |
@@ -7,5 +7,80 @@ # fetch-mock [![Build Status](https://travis-ci.org/wheresrhys/fetch-mock.svg?branch=master)](https://travis-ci.org/wheresrhys/fetch-mock) [![Coverage Status](https://coveralls.io/repos/wheresrhys/fetch-mock/badge.svg)](https://coveralls.io/r/wheresrhys/fetch-mock) | ||
- fetch-mock doesn't declare fetch or Promise as dependencies; as you're testing `fetch` it's assumed you're already taking care of these globals | ||
- If you prefer documentation by example skip to the bottom of this README | ||
## API | ||
`require('fetch-mock')` exports a singleton with the following methods | ||
### `mock(config)` | ||
Replaces `fetch` with a sinon stub which, in addition to the default sinon behaviour, records each of its calls and optionally returns a stub response or passes the call through to `fetch`. `config` is an optional* object with the following properties. | ||
* `routes` Either a single object or an array of similar objects each defining how the mock handles a given request. Each route object must have the following properties. If multiple routes are specified the first matching route will be used to define the response | ||
* `name` A unique string naming the route | ||
* `matcher` The rule for matching calls to `fetch`. Accepts any of the following | ||
* `string` Either an exact url to match e.g. 'http://www.site.com/page.html' or, if the string begins with a `^`, the string following the `^` must begin the url e.g. '^http://www.site.com' would match 'http://www.site.com' or '^http://www.site.com/page.html' | ||
* `RegExp` A regular expression to test the url against | ||
* `Function(url, opts)` A function that is passed the url and opts `fetch` is called with and that returns a Boolean | ||
* `response` Configures the response object returned by the mock. Can have one of the following values | ||
* `string` creates a 200 response with the string as the response body | ||
* `config object` If the object contains any of the properties body, status, headers, throws; then these properties - all of them optional - are used to construct a response as follows | ||
* `body` Retunred in the response body | ||
* `status` Returned in the response status | ||
* `headers` Returned in the response headers. They should be defined as an object literal (property names case-insensitive) which will be converted to a `Headers` instance | ||
* `throws` If this property is present then a `Promise` rejected with the value of `throws` is returned | ||
* `object literal` As long as the object does not contain any of the above properties it is converted into a json string and this is returned as the body of a 200 response | ||
* `Function(url, opts)` A function that is passed the url and opts `fetch` is called with and that returns any of the responses listed above | ||
* `responses` When `registerRoute` has already been used to register some routes then `responses` can be used to override the default response. It's value should be an object mapping route names to responses, which should be similar to those listed immediately above e.g. | ||
```javascript | ||
responses: { | ||
session: function (url, opts) { | ||
if (opts.headers.authorized) { | ||
return {user: 'dummy-authorized-user'}; | ||
} else { | ||
return {user: 'dummy-unauthorized-user'}; | ||
} | ||
} | ||
} | ||
``` | ||
* `greed` Determines how the mock handles unmatched requests | ||
* 'none': all unmatched calls get passed through to `fetch` | ||
* 'bad': all unmatched calls result in a rejected promise | ||
* 'good': all unmatched calls result in a resolved promise with a 200 status | ||
\* `config` is optional only when preconfigured routes have already been setup | ||
### `restore()` | ||
Restores `fetch` to its unstubbed state and clears all data recorded for its calls | ||
### `reset()` | ||
Clears all data recorded for `fetch`'s calls | ||
### `calls(routeName)` | ||
Returns an array of arrays of the arguments passed to `fetch` that matched the given route | ||
### `called(routeName)` | ||
Returns a Boolean denoting whether any calls matched the given route | ||
### `reMock()` | ||
Normally calling `mock()` twice without restoring inbetween will throw an error. `reMock()` calls `restore()` internally before calling `mock()` again. This allows you to put a generic call to `mock()` in a `beforeEach()` while retaining the flexibility to vary the responses for some tests | ||
### `registerRoute(name, matcher, response)` | ||
Often your application/module will always need responses for some calls in order to initialise properly, even if the content of those calls are not the subject of a given test e.g. a mock response from an authentication service and a lti-variant testing service might be necessary in order to test the UI for a version of a log in form. It's helpful to be able to define some default responses for these services which will exist throughout all or a large subset of your tests. `registerRoute` aims to fulfil this need. All these predefined routes can be overridden when `mock(config)` is called. | ||
`registerRoute` takes either of the following parameters | ||
* `object` An object similar to the route objects accepted by `mock()` | ||
* `array` An array of the above objects | ||
* `name`, `matcher`, `response` The 3 properties of the route object spread across 3 parameters | ||
### `unregisterRoute(name)` | ||
Unregisters one or more previously registered routes. Accepts either a string or an array of strings | ||
## Example | ||
```javascript | ||
var fetchMock = require('fetch-mock'); | ||
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