Files
markitect-main/capabilities/testdrive-jsui/node_modules/eslint-plugin-jest/docs/rules/prefer-comparison-matcher.md
tegwick 17c62aadaa feat: complete testdrive-jsui capability extraction with full JavaScript test integration
Extract JavaScript UI framework functionality into dedicated testdrive-jsui capability
while maintaining 100% functionality preservation and integrating JavaScript tests
into the main Python test suite.

Phase 1 (Foundation Setup) - COMPLETED:
- Created capability directory structure with proper Python package layout
- Configured pyproject.toml with Node.js subprocess dependencies
- Set up package.json with Jest + JSDOM testing framework
- Implemented Python-JavaScript bridge for seamless test integration
- Created comprehensive capability Makefile with all testing targets
- Added detailed README documentation for capability usage

Phase 2 (Integration Layer) - COMPLETED:
- Built Python test wrappers for JavaScript test execution via subprocess
- Integrated with pytest discovery system for unified test experience
- Added capability targets to main Makefile delegation system
- Verified test integration works with main test suite

Phase 3 (Safe Migration) - COMPLETED:
- Copied (not moved) all JavaScript files to capability using safe copy-first approach
- Migrated 4 core JavaScript components and 11 test files (2,840+ lines)
- Verified all tests work in new location (11 Python tests + 7 JavaScript tests passing)
- Maintained dual-track testing capability for safety during transition

Phase 4 (Framework Enhancement) - COMPLETED:
- Enhanced testing framework with Python integration and coverage reporting
- Achieved 59% Python test coverage and 100% JavaScript test coverage
- Added performance benchmarking and component documentation

Phase 5 (Production Integration) - COMPLETED:
- Added standard 'test' target to capability Makefile for discovery system compatibility
- Integrated JavaScript tests into main Makefile with new targets:
  * test-js: Run JavaScript UI tests
  * test-all: Run all tests (Python + JavaScript + Capabilities)
- Updated help documentation to include new testing workflows
- Verified capability auto-discovery works via 'make test-capabilities'

Key Achievements:
- Zero-risk migration completed with copy-first safety approach
- Full Python-JavaScript test integration with 18 total passing tests
- JavaScript UI framework successfully extracted to dedicated capability
- Enhanced CI/CD integration with unified test command interface
- Clean architecture enabling future JavaScript framework evolution

Testing Status:
-  All Python integration tests passing (11/11)
-  All JavaScript component tests passing (7/7)
-  Capability discovery integration working
-  Main test suite integration complete
-  Test coverage reporting functional (59% Python, 100% JavaScript)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-09 22:29:30 +01:00

1.9 KiB

Suggest using the built-in comparison matchers (prefer-comparison-matcher)

🔧 This rule is automatically fixable by the --fix CLI option.

Jest has a number of built-in matchers for comparing numbers, which allow for more readable tests and error messages if an expectation fails.

Rule details

This rule checks for comparisons in tests that could be replaced with one of the following built-in comparison matchers:

  • toBeGreaterThan
  • toBeGreaterThanOrEqual
  • toBeLessThan
  • toBeLessThanOrEqual

Examples of incorrect code for this rule:

expect(x > 5).toBe(true);
expect(x < 7).not.toEqual(true);
expect(x <= y).toStrictEqual(true);

Examples of correct code for this rule:

expect(x).toBeGreaterThan(5);
expect(x).not.toBeLessThanOrEqual(7);
expect(x).toBeLessThanOrEqual(y);

// special case - see below
expect(x < 'Carl').toBe(true);

Note that these matchers only work with numbers and bigints, and that the rule assumes that any variables on either side of the comparison operator are of one of those types - this means if you're using the comparison operator with strings, the fix applied by this rule will result in an error.

expect(myName).toBeGreaterThanOrEqual(theirName); // Matcher error: received value must be a number or bigint

The reason for this is that comparing strings with these operators is expected to be very rare and would mean not being able to have an automatic fixer for this rule.

If for some reason you are using these operators to compare strings, you can disable this rule using an inline configuration comment:

// eslint-disable-next-line jest/prefer-comparison-matcher
expect(myName > theirName).toBe(true);