chai-callslike

chai-callslike

A simple assertion to validate many aspects of stub calls. It is supposed to use with sinon + chai.

How it works

expect(stub).callsLike

Will validate the exactly interaction with the mocked method, which is:

• How many times has been called;
• Which parameters have been passed to it;
• In what order the calls happened.

How to use?

It is pretty simple to setup the chai-callslike in your tests:

import chai from 'chai'
import {callsLike} from 'chai-callslike'

chai.use(callsLike)

Just pass the stub in the first parameter and, in the others, arrays with the set of parameters each calls had received.

expect(myStub).callsLike(
  ['param1call1', 'param2call1', 'param3call1'],
  ['param1call2', 'param2call2', 'param3call2'],
 );

If you want to check if the stub had never been called, pass just the stub:

expect(myStub).callsLike();

If you expect the stub to have been called with no parameters, pass empty arrays:

expect(myStub).callsLike([], [], [])

(in this example, myStub have been called three times with no parameters)

You can also use sinon matchers to validate the parameters instead of exact values:

expect(myStub).callsLike(
  [sinon.match.object, sinon.match.string, sinon.match(/.+foo.+goo/)]
 );

The generated log will look pretty as this:

For more info look into the Full API Reference.