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JavaScript Unit Testing

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Test Suites and Test Specs (describe and it)

3:34 with Guil Hernandez and Joseph Fraley

In this video, you'll learn to write a test suite using the 'describe()' function, and a test spec using the 'it()' function.

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Video review

  • A test suite is a block of unit tests that are all closely related; they test the same function or similar parts of our code base
  • We introduce a test suite in Mocha using describe()
  • Each individual unit test is sometimes called a “spec”
  • Mocha makes it natural to write specs by containing them in a function called it()
  • To use Chai's expect method, import Chai at the top of your file: var expect = require('chai').expect

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    Remember, a Test suite is a block of unit tests that are all closely related 0:00
    because they test the same function or they test similar parts of our code base. 0:04
    We introduce a test suite in Mocha using describe. 0:09
    Describe is a function that takes two arguments. 0:19
    A string and another function. 0:22
    We used a string to describe what the suite will cover. 0:26
    So, for example, let's write a test for 0:29

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