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Agent skill
go-testing-helpers
Test helper patterns with t.Helper()
Install this agent skill to your Project
npx add-skill https://github.com/JamesPrial/claudefiles/tree/main/skills/golang/testing/helpers
SKILL.md
Test Helpers
Extract common test logic into helper functions with t.Helper().
CORRECT
func assertEqual(t *testing.T, got, want interface{}) {
t.Helper() // Reports caller line, not helper line
if got != want {
t.Errorf("got %v, want %v", got, want)
}
}
func assertNoError(t *testing.T, err error) {
t.Helper()
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
}
func Test_Process(t *testing.T) {
result, err := Process("input")
assertNoError(t, err)
assertEqual(t, result, "expected")
}
Why:
- t.Helper() marks function as helper
- Error reports show caller line, not helper line
- Reduces test boilerplate
- Consistent assertion patterns
WRONG
func assertEqual(t *testing.T, got, want interface{}) {
// Missing t.Helper()
if got != want {
t.Errorf("got %v, want %v", got, want)
}
}
Problems:
- Errors point to helper line
- Hard to find actual test failure
- Confusing stack traces
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