使い方
- インストールコマンドをコピーし、自分の環境へ導入する前にソースを確認します。
- 必要なツール、認証情報、対応環境を原文で確認します。
- 入力と成果物を指定し、出力を資料と照合します。
npx skills add https://github.com/mdsmithaustin/pstack --skill principle-test-behavior-not-implementation開始前の確認
- 導入にはモデル契約、API枠、ファイルへのアクセス許可は含まれません。
- スター数や導入数は活動の指標であり、独立した品質・安全性試験ではありません。
見出し、例、コード、表、リンク、参照画像を含む原文を表示しています。
Test Behavior, Not Implementation
A test calls the code as its users do and asserts the exact result they see. Rewrite or delete any test that would still pass if every imported function returned undefined or a wrong value.
These shapes fail that check:
- Loose or no assertion:
toBeDefined,toBeTruthy,not.toThrow,toBeGreaterThan(0). - Call or absence only:
toHaveBeenCalled,not.toHaveBeenCalled,toBeUndefined,toEqual([]). - Expected value computed by the code under test:
expect(f(a)).toBe(f(a)). - Restated constant, config default, table row, or prompt string.
- Assertions on data the test built, with no call to the subject.
Fix: call the subject in the test body with one concrete input and assert the literal output or effect. For a mock, assert the payload it received. For an absence, also assert the presence on another input. For a constant, test the mechanism that reads it with one input instead of restating the value.
Keep relation checks across table rows (a key in two tables, a parent that exists) and *.test-d.ts type checks.
Production prerequisites. An acceptance test must not pass because its setup establishes state or ordering that production never establishes. Exercise the real initialization path or prove that the caller supplies the prerequisite. Ordinary fixture inputs that real callers can supply are valid.
Notation, not a runtime. Write Given, When, Then or Gherkin-style tests in the project's existing framework. Do not add Cucumber, a Gherkin runner, or .feature files unless the project already runs one or the user explicitly asks for Cucumber, a runner, or .feature files. A request for Gherkin-style tests is not such a request.
