4 merge requests!12191Lim.Pisey.168:/Identified - We are currently investigating reports of missing build logs. The issue has been identified and a resolution is in progress. We will provide a further update when available.Mar 21, 09:02 UTC,!12853brikk,!5717Automatically extract project file structure from build bundle file,!1933Add note about installing watchman
All `expect()` matchers supported by Jest are [extensively documented here](http://facebook.github.io/jest/docs/api.html#expect-value).<br>
All `expect()` matchers supported by Jest are [extensively documented here](http://facebook.github.io/jest/docs/expect.html).<br>
You can also use [`jest.fn()` and `expect(fn).toBeCalled()`](http://facebook.github.io/jest/docs/api.html#tobecalled) to create “spies” or mock functions.
You can also use [`jest.fn()` and `expect(fn).toBeCalled()`](http://facebook.github.io/jest/docs/expect.html#tohavebeencalled) to create “spies” or mock functions.
All Jest matchers are [extensively documented here](http://facebook.github.io/jest/docs/api.html#expect-value).<br>
All Jest matchers are [extensively documented here](http://facebook.github.io/jest/docs/expect.html).<br>
Nevertheless you can use a third-party assertion library like [Chai](http://chaijs.com/) if you want to, as described below.
Nevertheless you can use a third-party assertion library like [Chai](http://chaijs.com/) if you want to, as described below.
Additionally, you might find [jest-enzyme](https://github.com/blainekasten/enzyme-matchers) helpful to simplify your tests with readable matchers. The above `contains` code can be written simpler with jest-enzyme.
Additionally, you might find [jest-enzyme](https://github.com/blainekasten/enzyme-matchers) helpful to simplify your tests with readable matchers. The above `contains` code can be written simpler with jest-enzyme.
