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Ensuring Elixir Application Performance with Testing and ExUnit

Behaviors

Explore how behaviors in Elixir help define clear interfaces for external dependencies, improving test reliability by enabling compile-time checks and easy creation of fake modules for testing.

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Interfacing to external dependencies with behaviors

The interface that the SoggyWaffle.WeatherAPI module provides is simple, as it’s made of just one function. However, if we expand the functionalities of the SoggyWaffle.WeatherAPI module, it would be hard to keep SoggyWaffle.FakeWeatherAPI up to date ...