tdd

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Original

English

🇨🇳

Chinese

Tests verify behavior through public interfaces, not implementation. Good tests survive refactors.

See

principles.md

for testing philosophy and anti-patterns.

测试通过公共接口验证行为，而非实现细节。优秀的测试在重构后仍能正常运行。

有关测试理念及反模式，请查看

principles.md

。

RED:   Write first test → fails
GREEN: Minimal code to pass → passes

RED:   Write first test → fails
GREEN: Minimal code to pass → passes

For each remaining behavior:

RED:   Write next test → fails
GREEN: Minimal code to pass → passes

Rules:

针对每个剩余的行为：

RED:   Write next test → fails
GREEN: Minimal code to pass → passes

规则：

Once all tests GREEN:

当所有测试都处于GREEN状态时：

DO NOT write all tests first, then all implementation. DO use vertical slices: one test → one implementation → repeat.

See

examples.md

for workflow demonstrations.

请勿先编写所有测试，再编写全部实现代码。请采用纵向切片方式：编写一个测试 → 实现对应功能 → 重复此流程。

有关工作流演示，请查看

examples.md

。