Why and how to test software?

Testing pieces of code

Which functionality to write unit tests for

Using Rust's built-in unit tests

cf. https://doc.rust-lang.org/book/second-edition/ch11-03-test-organization.html#unit-tests

Writing unit-testable code

Mocking external dependencies with traits

Property testing

cf. https://docs.rs/proptest

Testing whole systems

Cargo's integration tests

cf. https://doc.rust-lang.org/book/second-edition/ch11-03-test-organization.html#integration-tests

Documentation tests

cf. https://doc.rust-lang.org/1.30.0/rustdoc/documentation-tests.html

Fuzz testing

cf. https://fuzz.rs/book/introduction.html

Measuring test coverage

Benchmarking

Profiling

Using Rust nightly's bechmarking framework

Using the criterion framework

cf. https://japaric.github.io/criterion.rs/book/index.html