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Practice Taskintermediateubuntu:24.04Ask AI

Test Behaviour, Not Implementation

The value of a test is what it protects. Write the rule that keeps the suite about behaviour.

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01Requirements

live checks
  • File ~/tests/behaviour.md exists○
  • The document states what to assert on○
  • The document states what not to couple the tests to○

02Walkthrough

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  1. 01

    Create the tests directory

    The rule is one page, and it saves an afternoon every time it is forgotten.

    mkdir -p ~/tests
  2. 3 locked · each failed submit reveals one

03Stuck?

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Take a hint without losing the lab — each one points at the thing to look at, not at the answer.

04AI Tutor

guides, never solves

Tell me what you're stuck on — I'll nudge, not solve. Which requirement are you looking at?

04Notebook

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learner@lab — ubuntu:24.04

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