Sometimes unit tests just don't cut it. We may need to integrate two features developed independently and, while each works and is unit tested, there is no easy way to test them along with a unit test. Also, it defeats the purpose of unit tests--testing atomic units of the software. Integration testing and e2e (end-to-end) testing can be performed in these cases. Nightwatch is software that basically mimics a user clicking and typing around in a website. This is probably what we want as an ultimate verification that the whole system works.
End-to-end testing with nightwatch
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