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20. Testing and Documentation

cargo test, doc tests and clippy.

1 min read2 questionsup to 50 XPtopic 20/50

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Unit tests live beside code in a `#[cfg(test)] mod tests`, integration tests in tests/. Examples in doc comments are compiled and run by cargo test. rustfmt formats and clippy lints, both standard in CI.

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 4. Read every explanation, even for the answers you got right.

Scoring

  • · Up to 30 XP from quiz accuracy.
  • · +15 XP for a perfect first attempt.
  • · +5 XP while a 3-day streak is running.
  • · 75% or higher marks the topic complete.

Check your understanding

  1. 1. Where do integration tests live?

  2. 2. Are doc-comment examples executed?

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