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Mocking and Dependency Injection in Elixir Tests
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=== Setting Up Mox === To use Mox, we first need to add it as a dependency in our project's `mix.exs` file. After adding it, we can fetch the dependency by running `mix deps.get`: ```elixir defp deps do [ {:mox, "~> 1.12", only: :test} ] end ``` Now that Mox is included, we need to configure it for our tests. We can do this in the `test_helper.exs` file: ```elixir ExUnit.start() # Configure Mox Mox.defmock(FakeModule, for: MyModule) ``` In the example above, we define a mock module called `FakeModule` that will replace any calls to `MyModule` during tests.
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