fix(discovery): suffix + inheritance-based test class matching

[NikkeTryHard]

Summary

• Add is_test_class() helper matching Test* prefix, *Test, *Tests, and *TestCase suffixes
• Add has_testcase_base() to inspect AST base classes for direct TestCase inheritance
• Simplify resolver fixture lookup — remove redundant name filter
• Fix pre-existing deprecated criterion::black_box in bench files

Closes #80

Results

Metric	Before	After
Django tests discovered	~1,043	9,237
Unique test classes	~134	1,113
Unit tests	849	854

Verified in Docker: cargo build ✅ cargo fmt ✅ cargo clippy -D warnings ✅ 854/854 tests pass ✅

Follow-up

Remaining gaps (transitive inheritance, inherited methods) tracked in #86.

Summary by CodeRabbit

• New Features

  • Enhanced test discovery for Python projects to recognize more test class patterns, including suffix-based naming conventions (Test/Tests) and inheritance from TestCase-based frameworks.

• Performance Improvements

  • Increased test execution parallelism for faster results.
  • Optimized Docker builds with pre-built binaries and persistent caching to accelerate container rebuilds.

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

This PR increases build parallelism (jobs and test threads from 4 to 8), optimizes Docker builds by downloading pre-built binaries instead of building from source, refactors benchmark code to use standard library imports directly, adds persistent cargo volume in Docker Compose, and enhances Python test discovery to recognize test classes by multiple naming conventions (suffix-based matching) and base-class inheritance patterns.

Changes

Cohort / File(s)	Summary
Build & Parallelism Configuration .cargo/config.toml, .config/nextest.toml	Increased parallelism limits: jobs/test-threads changed from 4 to 8. Nextest config updated to use numeric value 8 instead of "num-cpus" string.
Docker Optimization Dockerfile	Replaced cargo install builds with pre-built binary downloads: sccache v0.10.0 and latest nextest Linux binary, extracted directly to /usr/local/bin.
Benchmark Imports benches/hot_paths.rs, benches/plugin_overhead.rs	Removed import alias for black_box; switched to direct std::hint::black_box usage.
Docker Compose Volume docker-compose.yml	Added named cargo-target volume and mounted it to /workspace/target for build cache persistence across container rebuilds.
Test Discovery Logic src/discovery/mod.rs, src/discovery/resolver.rs, src/discovery/scanner.rs	Added is_test_class() and has_testcase_base() utilities. Expanded class detection from prefix-only ("Test*") to support suffix matching ("Test", "Tests") and base-class inheritance (unittest.TestCase, Django patterns). Relaxed class-scoped fixture lookup to remove "Test" prefix requirement. Added 199 lines of comprehensive unit tests covering suffix-based discovery, inheritance patterns, parametrized tests, async tests, and edge cases.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Possibly related issues

• fix(discovery): resolve inherited test classes via base class analysis #85: Directly implements base-class detection via has_testcase_base() utility and scanner integration to resolve test classes inheriting from unittest.TestCase and similar patterns, matching the phase-2 proposal.
• Test discovery misses classes with transitive TestCase inheritance and inherited test methods #86: Adds direct base-class detection but does not implement transitive inheritance or inherited-method resolution; partially addresses the enhancement but leaves deeper inheritance chains for future work.

Suggested labels

discovery, tests, rust, ci

Poem

🐰 A discovery so bright and keen,
Now matches names we've never seen!
From "Tests" that end to bases deep,
More hidden tests our burrow shall keep! ✨

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/issue-80-test-class-discovery

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}