Elixir offers new paradigms, and challenges you to test in unconventional ways.
Start with ExUnit: almost everything you need to write tests covering all levels of detail, from unit to integration, but only if you know how to use it to the fullest - we'll show you how. Explore testing Elixir-specific challenges such as OTP-based modules, asynchronous code, Ecto-based applications, and Phoenix applications.
Explore new tools like Mox for mocks and StreamData for property-based testing. Armed with this knowledge, you can create test suites that add value to your production cycle and guard you from regressions.
What You Need:
Start with ExUnit: almost everything you need to write tests covering all levels of detail, from unit to integration, but only if you know how to use it to the fullest - we'll show you how. Explore testing Elixir-specific challenges such as OTP-based modules, asynchronous code, Ecto-based applications, and Phoenix applications.
Explore new tools like Mox for mocks and StreamData for property-based testing. Armed with this knowledge, you can create test suites that add value to your production cycle and guard you from regressions.
- Write Elixir tests that you can be proud of.
- Dive into Elixir's test philosophy and gain mastery over the terminology and concepts that underlie good tests.
- Create and structure a comprehensive ExUnit test suite, starting from the basics, and build comprehensive test coverage that will provide safety for refactoring and confidence that your code performs as designed.
- Use tests to make your software more reliable and fault tolerant.
- Explore the basic tool set provided by ExUnit and Mix to write and organize your test suite.
- Test code built around different OTP functionality.
- Isolate your code through dependency injection and by using Mox.
- Write comprehensive tests for Ecto projects, covering Ecto as a database tool as well as a standalone data validation tool.
- Test Phoenix channels from end to end, including authentication and joining topics.
- Write Phoenix controller tests and understand the concepts of integration testing in Elixir. Learn property-based testing with StreamData from the author who wrote the library.
What You Need:
To get the most out of this book, you will need to have installed Elixir 1.8 or later and Erlang/OTP 21 or later. In order to complete the relevant chapters, you will also need Ecto 3.1 or later, EctoSQL 3.1 or later and Phoenix 1.3 or later.
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