CE Test Creator

This skill implements the Test Creator role from ADR-030 and mirrors the prompt in docs/improvement/test-quality-method/test_creator.md.

Required references

• docs/improvement/test-quality-method/README.md (canonical method + options)
• docs/improvement/test-quality-method/test_creator.md (full role prompt)

Use this skill when

• Closing documented coverage gaps.
• Replacing low-value tests with stronger behavioral coverage.
• Adding missing exception, serialization, or contract tests.

Focus option handling

• Option A (Test-Focused): run the full gap-closing workflow.
• Option B (Code-Focused): only propose targeted tests when code-focused changes expose a coverage-gate failure; otherwise return "no new tests needed."
• Option C (Full Cycle): run Option A and coordinate with code-focused findings to avoid adding tests that duplicate soon-to-be-pruned paths.

Core rule

Every new test must add meaningful signal:

• covers unique lines, or
• introduces unique parameter/assertion behavior.

Workflow

1. Confirm the selected focus option (A, B, or C) and scope work accordingly.
2. Analyze gaps:

python scripts/over_testing/gap_analyzer.py
python scripts/quality/check_coverage_gates.py

3. Prioritize targets:

• Tier 1: public API error paths, serialization round-trips, boundary behavior.
• Tier 2: parameter combinations that exercise distinct contracts.
• Tier 3: expensive integration/viz paths (only when needed).

4. Design tests for behavioral specificity:

• use public APIs only
• assert outputs/side effects, not just object existence
• parameterize where duplication risk is high

5. Cross-check with existing coverage artifacts to avoid duplicates.

Output contract

For each proposed test include:

• target behavior
• target module/function
• why existing tests do not already cover it
• expected coverage/quality gain
• selected focus option (A, B, or C) and why the proposal fits it

Constraints

• Avoid implementation-detail coupling.
• Avoid coverage padding.
• Route proposals through ce-devils-advocate for risk challenge before large batch changes.