node-fetch-response-matchers


Chai plugin with matchers for node-fetch promise response.
It helps the tests to be more declarative.

TL;DR

- This lib gives you a declarative way to assert fetch response, Also it hides the promises and their callbacks noise:
``javascript
it('some-test', function(){
return expect(fetch('http://localhost/')).to.be.successful()
.and.to.haveBodyText('foo');

});
`

- If you are not using this lib it becomes very verbose:
`javascript
it('some-test', function(done){
fetch('http://localhost/')
.then(res => {
expect(res.status).to.equal(200);
return res.text();
}).then(text => {
expect(text).to.equal('foo');
done();
})
});
`

Install (for dev only - used by tests)


`shell
$ npm install --save-dev node-fetch-response-matchers
`

Usage example

`javascript

const nodeFetchMatchers = require('node-fetch-response-matchers');
const fetch = require('node-fetch');
const chai = require('chai');

chai.use(nodeFetchMatchers);

describe('test suite', function(){
it('http success test', function(){
return expect(fetch('http://localhost/')).to.be.successful();
});
it('and', function(){
return expect(fetch('http://localhost/')).to.be.successful()
.and.haveBodyText('foo');
});
});
`

$3

You can all use chai "not"

`javascript
it('not', function(){
return expect(fetch('http://localhost/')).to.not.be.successful();
});
`

Status matchers

`javascript
it('http success test', function(){
return expect(fetch('http://localhost/')).to.be.successful();
});
it('http status assert', function(){
return expect(fetch('http://localhost/')).to.haveStatus(500);
});
`

#### Full status matchers list

| API function | params | description |
| ---------------------|----------| ---------------------------------|
| successful() | () | Assert that the status is 200 OK |
| created() | () | Assert that the status is 201 |
| badRequest() | () | Assert that the status is 400 |
| unauthorized() | () | Assert that the status is 401 |
| rejected() | () | Assert that the status is 403 |
| notFound() | () | Assert that the status is 404 |
| serverError() | () | Assert that the status is 500 |
| serviceUnAvailable() | () | Assert that the status is 503 |
| haveStatus() | (status) | Assert that the status is provided number argument |

Body matchers

`javascript
it('have body object', () => {
return expect(fetch('http://localhost/').to.haveBodyObject({foo: 'bar'});
});
`
#### Full body matchers list

| API function | params | description |
| ----------------------|-------------------| -------------------------------------------------------------|
| haveBodyObject() | (obj) | Assert equal provided object |
| haveBodyText() | (text) | Assert equal provided string text |
| haveBodyBuffer() | (Buffer) | Assert equal provided Node Buffer |
| haveBodyRegexpMatch() | (regexp) | Assert match body on regular expression |
| haveBodyThat() | (predicate(text)) | Assert match body on provided function predicate on the text |




Header matchers

`javascript
it('have header', () => {
return expect(fetch('http://localhost/').to.haveHeader('connection', 'close');
});
`
#### Headers matchers list

| API function | params | description |
| ----------------|-------------------------| --------------------------------------------------------------------------------|
| haveHeader() | (name, value) | Assert that response contains header by provided name and value |
| headerExists() | (name) | Assert that response contains header by provided name |
| haveHeaderThat()| (name, predicate(value))| Assert that header with given name have true on the value for a given predicate |
| haveHeaders() | (headersMap) | Assert that given key-value headers are exists in headers response |

Cookie matchers

`javascript
it('have cookie', () => {
return expect(fetch('http://localhost/').to.haveCookie('foo', 'bar');
});
`
#### Cookie matchers list


| API function | params | description |
| -------------------|----------------------------| --------------------------------------------------------------------------|
| haveCookieByName() | (name) | Assert that cookie by name is written to the response |
| haveCookie() | (name, value) | Assert that cookie by name and value is written to the response |
| haveCookieThat() | (name, predicate(cookie)) | Assert that cookie by name and match given predicate on cookie properties |

Cache control response matchers

`javascript
it('must-revalidate', () => {
return expect(fetch('http://localhost/').to.have.cacheControlMustRevalidate();
});
it('max-age', () => {
return expect(fetch('http://localhost/').to.have.cacheControlmMaxAge(120);
});
``
#### cache control full matchers list

| API function | params |
| ------------------------------|-------------|
| cacheControlMustRevalidate() | () |
| cacheControlNoCache() | () |
| cacheControlNoStore() | () |
| cacheControlNoTransform() | () |
| cacheControlPublic() | () |
| cacheControlPrivate() | () |
| cacheControlProxyMaxRevalidate| () |
| cacheControlmMaxAge() | (age-in-sec)|
| cacheControlSMaxAge() | (age-in-sec)|