How to use cargo test features

Run cargo test with the --features flag followed by your feature name to execute tests gated by that feature. This compiles the code with the specified feature enabled and runs all tests, including those marked with #[cfg(feature = "...")].

cargo test --features your_feature_name

To run tests for multiple features, separate them with commas:

cargo test --features feature_a,feature_b

To run tests with all features enabled, use the --all-features flag:

cargo test --all-features

Features are optional switches in your code that turn specific functionality on or off. When you run tests with a feature flag, you tell the compiler to include that specific code so it can be tested. Think of it like flipping a light switch to test if a specific room's lights work before turning them off again.