![]() We'll write some unit tests today to verify the behavior of the independent reducer functions that our live view implements to establish socket state under different conditions. ![]() Unit tests also allow loose coupling because they don't rely on specific interactions between different parts of your code or your system. Such tests don't require much ceremony, so you can cover lots of scenarios quickly and easily. Pure unit tests call one function at a time and then check expectations with one or more assertions. Unit Tests in LiveViewĪ unit test is designed to test an individual unit of code. Let's dig a little deeper into what these two kinds of tests look like in LiveView. We're going to write two kinds of tests-unit tests and integration tests-and we'll use this procedure for both types. Compare an actual response to expectations.The basic principles for testing LiveView don't differ much from testing in other languages and frameworks. Let's get going! Principles for Testing LiveView in Elixir In the next post, you'll write more advanced integration tests, and even test a distributed, real-time update feature in LiveView. We'll explore more on what makes LiveView testing so powerful, understand the principles for approaching live view tests, and write some unit tests. With a high degree of test coverage firmly in hand, you and your team will be able to move quickly and confidently when building LiveView applications. LiveView's testing framework empowers you to quickly write robust and comprehensive tests that are highly stable. So your tests are fast, concurrent, and continue to keep your focus firmly on server-side code. Testing LiveView is no different-you can exercise the full functionality of your live views with pure Elixir tests written in ExUnit through the help of the LiveViewTest module. If you've worked with LiveView, you've already experienced how productive you and your team can be with a framework that lets you build interactive UIs, while keeping your brain firmly focused on the server-side. Introducing LiveView's Powerful Testing Tools In Part II, you'll write interactive LiveView tests that validate a full set of live view behaviors. In Part I, I'll introduce you to LiveView testing guidelines and you'll write some flexible and elegant LiveView unit tests. In this two-part series, you'll get a comprehensive overview of everything you need to know to test your LiveView applications in Elixir.
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