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Welcome to Section 16 on testing no J.S. applications.

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Now when we're talking about testing our no J.S. apps we're not talking about manually testing them.

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That's where we perform some operation in our application and we use our eyes to verify that we're getting

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the correct result.

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What I'm talking about is setting up an automated test suite.

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That's where we write a little bit of code that performs an operation in our app.

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Then we add a little more code that asserts we got back the result we were expecting.

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So this is going to help us out tremendously especially as our application grows.

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When we start off we might only have a few features to manually test and it might only take a couple

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of minutes.

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But as our application grows in complexity that's quickly going to get out of hand.

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The great thing about an automated test suite is that we write the test case a single time and we can

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run it as many times as we need to.

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I could run it 10 times in a minute one time for every single change I make to the project that's going

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to give us a lot of confidence that we're not shipping broken or buggy code to our paying users in production.

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So in this section you're going to learn how to set up that automated test suite.

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Now even if you don't plan on testing me side project you're working on I still recommend working through

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this section as if you use no J.S. in a professional setting.

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They're likely going to require you to perform some sort of automated testing and if you work through

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the section you'll have the skills to get that done.

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All right.

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Let's jump right in.