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Diffstat (limited to 'claude-rules/testing.md')
| -rw-r--r-- | claude-rules/testing.md | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/claude-rules/testing.md b/claude-rules/testing.md index 02c6ce0..a6bc1df 100644 --- a/claude-rules/testing.md +++ b/claude-rules/testing.md @@ -158,6 +158,13 @@ the specific case choice. - Never hardcode dates or times — generate them relative to `now()` - No reliance on test execution order - No flaky network calls in unit tests +- Time/clock-mocking helpers must not call the primitives they're + mocking (infinite recursion), and must not `let`-bind over a + `defvar` or other globally-defined symbol (the binding shadows the + global only inside the test scope, so production code that reads the + symbol gets the original value, not the mock — silent test miss). + Mock by redefining at the symbol's definition site or via the + language's first-class mocking primitive. ### Performance - Unit tests: <100ms each |