| name | testability-scoring |
| description | AI-powered testability assessment using 10 principles of intrinsic testability with Playwright. Evaluates web applications against Observability, Controllability, Algorithmic Simplicity, Transparency, Stability, Explainability, Unbugginess, Smallness, Decomposability, and Similarity. Use when assessing software testability, evaluating test readiness, identifying testability improvements, or generating testability reports. |
| category | testing-methodologies |
| priority | high |
| tokenEstimate | 1100 |
| agents | ["qe-quality-analyzer","qx-partner","qe-visual-tester"] |
| implementation_status | optimized |
| optimization_version | 2.1 |
| last_optimized | 2025-12-03T00:00:00.000Z |
| dependencies | [] |
| quick_reference_card | true |
| tags | ["testability","scoring","playwright","assessment","10-principles","intrinsic-testability","james-bach","michael-bolton"] |
| contributor | @fndlalit |
Testability Scoring
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When assessing testability:
- RUN assessment against target URL
- ANALYZE all 10 principles automatically
- GENERATE HTML report with radar chart
- PRIORITIZE improvements by impact/effort
- INTEGRATE with QX Partner for holistic view
Quick Assessment:
TEST_URL='https://example.com/' npx playwright test tests/testability-scoring/testability-scoring.spec.js --project=chromium --workers=1
.claude/skills/testability-scoring/scripts/run-assessment.sh https://example.com/
The 10 Principles at a Glance:
| Principle | Weight | Key Question |
|---|
| Observability | 15% | Can we see what's happening? |
| Controllability | 15% | Can we control the application? |
| Algorithmic Simplicity | 10% | Are behaviors predictable? |
| Algorithmic Transparency | 10% | Can we understand what it does? |
| Algorithmic Stability | 10% | Does behavior remain consistent? |
| Explainability | 10% | Is the interface understandable? |
| Unbugginess | 10% | How error-free is it? |
| Smallness | 10% | Are components appropriately sized? |
| Decomposability | 5% | Can we test parts in isolation? |
| Similarity | 5% | Is the tech stack familiar? |
Grade Scale:
- A (90-100): Excellent testability
- B (80-89): Good testability
- C (70-79): Adequate testability
- D (60-69): Below average
