test-driven-development

Mechanism

When It Triggers · How It Works · What It Produces

Breaks down how the skill works and what it produces, so you can quickly judge whether it fits your scenario and value.

Trigger

When implementing any logic, fixing any bug, or changing any behavior
When you need to prove that code works

Mechanism

Red-Green-Refactor cycle: RED (write failing test) → GREEN (minimal code to pass) → REFACTOR (improve)
Test pyramid: 80% unit / 15% integration / 5% E2E
DAMP over DRY: test readability over消除重复
Beyonce Rule: if you liked it then you shoulda put a test on it
Discover test framework first (don't assume npm test)

Outcome

Test-verified code with complete test suite and regression protection

Use Cases

Two Typical Use Cases

Scenario 01

TDD Feature Development

When developing a new feature, the agent writes tests defining expected behavior (RED), confirms failure, writes minimal implementation to pass (GREEN), and refactors (REFACTOR), each cycle focusing on a small unit of functionality.

Scenario 02

Bug Fix with Prove-It Pattern

When a bug is reported, the agent first writes a test reproducing the bug (RED), confirms it fails due to the bug, fixes the code to pass (GREEN), and ensures the test becomes part of the regression test suite.

Skill Relationships

Which Skills I Use · Which Skills Use Me

Dependency relationships read as "the upper tier points to the lower tier." The current Skill sits in the middle tier — above are Skills that depend on it, below are Skills it depends on.

Tier 1 · These Skills Use Me

No explicit dependency

Tier 2 · Current Skill

test-driven-developmentWorkflow

Tier 3 · I Use These Skills

browser-testing-with-devtoolsCLI Manual

Full Relationship Graph

Browse this skill's relationships within its skillset. Click a node to switch the side panel; use the search box to jump to any skill.

Skill File

SKILL.md

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Skill Composition

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▸skills/test-driven-development/
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- ·SKILL.md

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Workflow

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Workflow

When It Triggers · How It Works · What It Produces

Trigger

Mechanism

Outcome

Two Typical Use Cases

TDD Feature Development

Bug Fix with Prove-It Pattern

Which Skills I Use · Which Skills Use Me

Full Relationship Graph

SKILL.md

Skill Composition

You May Also Need These Skills

api-and-interface-design

browser-testing-with-devtools

ci-cd-and-automation

code-review-and-quality

/test-driven-development

Two Typical Use Cases

TDD Feature Development

Bug Fix with Prove-It Pattern

SKILL.md

Skill Composition

When It Triggers · How It Works · What It Produces

Trigger

Mechanism

Outcome

You May Also Need These Skills

api-and-interface-design

browser-testing-with-devtools

ci-cd-and-automation

code-review-and-quality

Which Skills I Use · Which Skills Use Me

Full Relationship Graph