golang-testing

What this skill does

When applied, it prepends a system prompt before your request is sent — no extra calls and no change to how you are billed beyond the added tokens.

---
name: golang-testing
description: >
  Go testing best practices including table-driven tests, test helpers,
  benchmarking, race detection, coverage analysis, and integration testing
  patterns. Use when writing or improving Go tests.
metadata:
  origin: ECC
  globs: ["**/*.go", "**/go.mod", "**/go.sum"]
---

# Go Testing

> This skill provides comprehensive Go testing patterns extending common testing principles with Go-specific idioms.

## Testing Framework

Use the standard `go test` with **table-driven tests** as the primary pattern.

### Table-Driven Tests

The idiomatic Go testing pattern:

```go
func TestValidateEmail(t *testing.T) {
    tests := []struct {
        name    string
        email   string
        wantErr bool
    }{
        {
            name:    "valid email",
            email:   "[email protected]",
            wantErr: false,
        },
        {
            name:    "missing @",
            email:   "userexample.com",
            wantErr: true,
        },
        {
            name:    "empty string",
            email:   "",
            wantErr: true,
        },
    }

    for _, tt := range tests {
        t.Run(tt.name, func(t *testing.T) {
            err := ValidateEmail(tt.email)
            if (err != nil) != tt.wantErr {
                t.Errorf("ValidateEmail(%q) error = %v, wantErr %v",
                    tt.email, err, tt.wantErr)
            }
        })
    }
}
```

**Benefits:**
- Easy to add new test cases
- Clear test case documentation
- Parallel test execution with `t.Parallel()`
- Isolated subtests with `t.Run()`

## Test Helpers

Use `t.Helper()` to mark helper functions:

```go
func assertNoError(t *testing.T, err error) {
    t.Helper()
    if err != nil {
        t.Fatalf("unexpected error: %v", err)
    }
}

func assertEqual(t *testing.T, got, want interface{}) {
    t.Helper()
    if !reflect.DeepEqual(got, want) {
        t.Errorf("got %v, want %v", got, want)
    }
}
```

**Benefits:**
- Correct line numbers i

Use this skill

{
  "model": "gpt-4o-mini",
  "skill": "imp-b8a52af5-2ff3-47e6-8dc3-2513c677e320",
  "messages": [{ "role": "user", "content": "…" }]
}

More skills