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JavaScript Unit Testing

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Introduction

1:27 with Guil Hernandez and Joseph Fraley

In this course you’ll practice a way to write JavaScript called Behavior Driven Development -- or BDD.

Video review

  • Tests help us understand the code we want to write -- like an outline
  • Tests let us know if our code behaves the way we want it to behave
  • Tests tell us when we’ve accidentally broken something
  • "Unit tests" focus on small, meaningful chunks of functionality
  • Good unit tests are easy to understand

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    [MUSIC] 0:00
    Hey everyone, I'm Guil, and this is JavaScript Unit Testing Basics. 0:04
    The material in this course assumes you know your way around JavaScript objects, 0:08
    node, and mpm. 0:13
    So make sure you complete all the prerequisites for 0:14
    this course before continuing. 0:17
    And if you wanna brush up on some of those videos, I've included the links and 0:18
    the teacher's notes as well. 0:23
    In this course, you'll practice a way to write JavaScript called, 0:24
    Behavior Driven Development or BDD. 0:29
    In BDD we write special functions, called tests, for 0:31
    our application before we actually write any real code. 0:35
    These tests describe how a code should work. 0:39
    In other words, tests describe the expected behavior of our application. 0:42
    Having these tests written already will help us understand the code we 0:47
    want to write. 0:51
    Like an outline, as we continue writing our code 0:52
    our tests will let us know as soon as our programs behave the way we want them to. 0:55
    They'll also tell us when we've accidentally broken something 1:00
    along the way. 1:02
    We'll build up our tests to cover one small unit of our code at a time. 1:04
    This style of testing is called unit testing. 1:08
    Since unit tests focus on small, 1:11
    meaningful chunks of functionality, good unit tests are easy to understand. 1:13
    They prove that each piece of our code does what we want. 1:18
    In the next video, 1:22
    I'll cover some of the ways unit testing makes development easier. 1:23

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