HTTP integration testing with Chai assertions.
- integration test request composition
- test http apps or external services
- assertions for common http tasks
- chai
expectandshouldinterfaces
This is a addon plugin for the Chai Assertion Library. Install via npm.
npm install chai-http
Use this plugin as you would all other Chai plugins.
var chai = require('chai')
, chaiHttp = require('chai-http');
chai.use(chaiHttp);To use Chai HTTP on a web page, just include the dist/chai-http.js file:
<script src="chai.js"></script>
<script src="chai-http.js"></script>
<script>
chai.use(chaiHttp);
</script>Chai HTTP provides an interface for live integration testing via superagent. To do this, you must first construct a request to an application or url.
Upon construction you are provided a chainable api that allows you to specify the http VERB request (get, post, etc) that you wish to invoke.
You may use a function (such as an express or connect app) or a node.js http(s) server as the foundation for your request. If the server is not running, chai-http will find a suitable port to listen on for a given test.
Note: This feature is only supported on Node.js, not in web browsers.
chai.request(app)
.get('/')When passing an app to request; it will automatically open the server for
incoming requests (by calling listen()) and, once a request has been made
the server will automatically shut down (by calling .close()). If you want to
keep the server open, perhaps if you're making multiple requests, you must call
.keepOpen() after .request(), and manually close the server down:
var requester = chai.request(app).keepOpen()
Promise.all([
requester.get('/a'),
requester.get('/b'),
])
.then(responses => ....)
.then(() => requester.close())You may also use a base url as the foundation of your request.
chai.request('http://localhost:8080')
.get('/')Once a request is created with a given VERB (get, post, etc), you chain on these additional methods to create your request:
| Method | Purpose |
|---|---|
.set(key, value) |
Set request headers |
.send(data) |
Set request data (default type is JSON) |
.type(dataType) |
Change the type of the data sent from the .send() method (xml, form, etc) |
.attach(field, file, attachment) |
Attach a file |
.auth(username, password) |
Add auth headers for Basic Authentication |
.query(parmasObject) |
Chain on some GET parameters |
Examples:
.set()
// Set a request header
chai.request(app)
.put('/user/me')
.set('Content-Type', 'application/json')
.send({ password: '123', confirmPassword: '123' }).send()
// Send some JSON
chai.request(app)
.put('/user/me')
.send({ password: '123', confirmPassword: '123' }).type()
// Send some Form Data
chai.request(app)
.post('/user/me')
.type('form')
.send({
'_method': 'put',
'password': '123',
'confirmPassword': '123'
}).attach()
// Attach a file
chai.request(app)
.post('/user/avatar')
.attach('imageField', fs.readFileSync('avatar.png'), 'avatar.png').auth()
// Authenticate with Basic authentication
chai.request(app)
.get('/protected')
.auth('user', 'pass').query()
// Chain some GET query parameters
chai.request(app)
.get('/search')
.query({name: 'foo', limit: 10}) // /search?name=foo&limit=10In the following examples we use Chai's Expect assertion library:
var expect = chai.expect;To make the request and assert on its response, the end method can be used:
chai.request(app)
.put('/user/me')
.send({ password: '123', confirmPassword: '123' })
.end(function (err, res) {
expect(err).to.be.null;
expect(res).to.have.status(200);
});Because the end function is passed a callback, assertions are run
asynchronously. Therefore, a mechanism must be used to notify the testing
framework that the callback has completed. Otherwise, the test will pass before
the assertions are checked.
For example, in the Mocha test framework, this is
accomplished using the
done callback, which signal that the
callback has completed, and the assertions can be verified:
it('fails, as expected', function(done) { // <= Pass in done callback
chai.request('http://localhost:8080')
.get('/')
.end(function(err, res) {
expect(res).to.have.status(123);
done(); // <= Call done to signal callback end
});
});
it('succeeds silently!', function() { // <= No done callback
chai.request('http://localhost:8080')
.get('/')
.end(function(err, res) {
expect(res).to.have.status(123); // <= Test completes before this runs
});
});When done is passed in, Mocha will wait until the call to done(), or until
the timeout expires. done also accepts an
error parameter when signaling completion.
If Promise is available, request() becomes a Promise capable library -
and chaining of thens becomes possible:
chai.request(app)
.put('/user/me')
.send({ password: '123', confirmPassword: '123' })
.then(function (res) {
expect(res).to.have.status(200);
})
.catch(function (err) {
throw err;
});Note: Node.js version 0.10.x and some older web browsers do not have native promise support. You can use any spec compliant library, such as:
- kriskowal/q
- stefanpenner/es6-promise
- petkaantonov/bluebird
- then/promise
You will need to set the library you use to
global.Promise, before requiring in chai-http. For example:
// Add promise support if this does not exist natively.
if (!global.Promise) {
global.Promise = require('q');
}
var chai = require('chai');
chai.use(require('chai-http'));Sometimes you need to keep cookies from one request, and send them with the
next (for example, when you want to login with the first request, then access an authenticated-only resource later). For this, .request.agent() is available:
// Log in
var agent = chai.request.agent(app)
agent
.post('/session')
.send({ username: 'me', password: '123' })
.then(function (res) {
expect(res).to.have.cookie('sessionid');
// The `agent` now has the sessionid cookie saved, and will send it
// back to the server in the next request:
return agent.get('/user/me')
.then(function (res) {
expect(res).to.have.status(200);
});
});Note: The server started by chai.request.agent(app) will not automatically close following the test(s). You should call agent.close() after your tests to ensure your program exits.
The Chai HTTP module provides a number of assertions
for the expect and should interfaces.
- @param {Number} status number
Assert that a response has a supplied status.
expect(res).to.have.status(200);- @param {String} header key (case insensitive)
- @param {String|RegExp} header value (optional)
Assert that a Response or Request object has a header.
If a value is provided, equality to value will be asserted.
You may also pass a regular expression to check.
Note: When running in a web browser, the same-origin policy only allows Chai HTTP to read certain headers, which can cause assertions to fail.
expect(req).to.have.header('x-api-key');
expect(req).to.have.header('content-type', 'text/plain');
expect(req).to.have.header('content-type', /^text/);Assert that a Response or Request object has headers.
Note: When running in a web browser, the same-origin policy only allows Chai HTTP to read certain headers, which can cause assertions to fail.
expect(req).to.have.headers;Assert that a string represents valid ip address.
expect('127.0.0.1').to.be.an.ip;
expect('2001:0db8:85a3:0000:0000:8a2e:0370:7334').to.be.an.ip;Assert that a Response or Request object has a given content-type.
expect(req).to.be.json;
expect(req).to.be.html;
expect(req).to.be.text;Assert that a Response or Request object has a given charset.
expect(req).to.have.charset('utf-8');Assert that a Response object has a redirect status code.
expect(res).to.redirect;
expect(res).to.not.redirect;- @param {String|RegExp} location url
Assert that a Response object redirects to the supplied location.
expect(res).to.redirectTo('http://example.com');
expect(res).to.redirectTo(/^\/search\/results\?orderBy=desc$/);- @param {String} parameter name
- @param {String} parameter value
Assert that a Request object has a query string parameter with a given
key, (optionally) equal to value
expect(req).to.have.param('orderby');
expect(req).to.have.param('orderby', 'date');
expect(req).to.not.have.param('limit');- @param {String} parameter name
- @param {String} parameter value
Assert that a Request or Response object has a cookie header with a
given key, (optionally) equal to value
expect(req).to.have.cookie('session_id');
expect(req).to.have.cookie('session_id', '1234');
expect(req).to.not.have.cookie('PHPSESSID');
expect(res).to.have.cookie('session_id');
expect(res).to.have.cookie('session_id', '1234');
expect(res).to.not.have.cookie('PHPSESSID');chai-http is released with semantic-release using the plugins:
commit-analyzerto determine the next version from commit messages.release-notes-generatorto summarize release inchangelogto update the CHANGELOG.md file.githubto publish a GitHub release.gitto commit release assets.npmto publish to npm.
(The MIT License)
Copyright (c) Jake Luer [email protected]
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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