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Implements snapshot/golden file tests with temporal normalization so tests don't break daily. Use when implementing tests that compare output against expected snapshots.
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Baseado na classificação ocupacional SOC
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Generates edge case, failure mode, and spec-driven test cases. Covers boundary values, nil inputs, concurrency, resource exhaustion, malformed data, and requirement-linked traceability tests.
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| name | vibe-golden-file-testing |
| description | Implements snapshot/golden file tests with temporal normalization so tests don't break daily. Use when implementing tests that compare output against expected snapshots. |
| user-invocable | true |
Golden file tests are powerful but brittle. This skill makes them robust.
Golden tests break when they contain:
2026-02-28 → different tomorrow)took 1.23s → varies by machine)Identify dynamic fields in the output being tested
Create normalizer function:
func normalizeOutput(s string) string {
// Dates: 2026-02-28 → REDACTED_DATE
s = dateRegex.ReplaceAll(s, "REDACTED_DATE")
// UUIDs: 550e8400-... → REDACTED_UUID
s = uuidRegex.ReplaceAll(s, "REDACTED_UUID")
// Timestamps: 1709136000 → REDACTED_TS
s = tsRegex.ReplaceAll(s, "REDACTED_TS")
// Durations: 1.23s → REDACTED_DURATION
s = durationRegex.ReplaceAll(s, "REDACTED_DURATION")
return s
}
Apply normalization to BOTH:
Generate golden file with update flag:
if os.Getenv("UPDATE_GOLDEN") == "1" {
os.WriteFile(goldenPath, normalized, 0644)
}
Document update command:
# To update golden files:
UPDATE_GOLDEN=1 go test ./...
| Pattern | Regex | Replacement |
|---|---|---|
| ISO Date | \d{4}-\d{2}-\d{2} | REDACTED_DATE |
| ISO DateTime | \d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2} | REDACTED_DATETIME |
| UUID | [0-9a-f]{8}-[0-9a-f]{4}-... | REDACTED_UUID |
| Unix timestamp | \b1[6-9]\d{8}\b | REDACTED_TS |
| Duration | \d+\.?\d*[µnm]?s | REDACTED_DURATION |
| Absolute path | /home/\w+/ or C:\\Users\\ | REDACTED_PATH |
| Port | :\d{4,5}\b | :REDACTED_PORT |
Dynamic fields found: X
Normalizations applied: Y
Golden file: [path]
Update command: UPDATE_GOLDEN=1 [test command]