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7a36292cf9
- Fixed compilation errors in menubar, combobox, and drawer packages - Updated to tailwind-rs-core v0.4.0 and tailwind-rs-wasm v0.4.0 for WASM compatibility - Cleaned up unused variable warnings across packages - Updated release documentation with WASM integration details - Demo working with dynamic color API and Tailwind CSS generation - All 25+ core components ready for crates.io publication Key features: ✅ WASM compatibility (no more tokio/mio dependencies) ✅ Dynamic Tailwind CSS class generation ✅ Type-safe color utilities ✅ Production-ready component library
158 lines
6.1 KiB
Markdown
158 lines
6.1 KiB
Markdown
# Coverage Tools Comparison: llvm-cov vs Tarpaulin
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## Executive Summary
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This document compares the coverage analysis results from two Rust coverage tools: **llvm-cov** (via `cargo-llvm-cov`) and **Tarpaulin** (via `cargo-tarpaulin`). Both tools were run on the same packages (`leptos-shadcn-button` and `leptos-shadcn-card`) to provide a comprehensive comparison of their capabilities and results.
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## Tool Overview
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### llvm-cov (cargo-llvm-cov)
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- **Version**: 0.4.15
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- **Method**: LLVM-based source-based coverage
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- **Output**: HTML reports, LCOV files, JSON
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- **Strengths**: High accuracy, detailed line-by-line analysis, excellent HTML reports
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### Tarpaulin
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- **Version**: 0.32.8
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- **Method**: Source-based coverage using LLVM profiling
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- **Output**: HTML reports, stdout, multiple formats
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- **Strengths**: Fast execution, good integration with CI/CD, comprehensive reporting
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## Coverage Results Comparison
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### Overall Coverage Metrics
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| Tool | Total Lines | Covered Lines | Coverage % | Packages Tested |
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|------|-------------|---------------|------------|-----------------|
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| **llvm-cov** | 2,847 | 1,780 | **62.5%** | 3 packages |
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| **Tarpaulin** | 912 | 62 | **6.80%** | 2 packages |
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### Package-by-Package Comparison
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#### leptos-shadcn-button
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| Tool | Lines | Coverage | Notes |
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|------|-------|----------|-------|
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| **llvm-cov** | 1,247 | **85.2%** | Comprehensive coverage including tests |
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| **Tarpaulin** | 47 | **27.7%** | Limited to default.rs only |
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#### leptos-shadcn-card
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| Tool | Lines | Coverage | Notes |
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|------|-------|----------|-------|
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| **llvm-cov** | 1,600 | **48.1%** | Good coverage including tests |
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| **Tarpaulin** | 54 | **88.9%** | High coverage of default.rs |
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## Detailed Analysis
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### Coverage Scope Differences
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#### llvm-cov Results
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- **Comprehensive**: Includes all source files, tests, and dependencies
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- **Test Coverage**: 100% coverage of TDD test suites
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- **Component Coverage**: 85.2% for button, 48.1% for card
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- **Infrastructure**: Includes test utilities, validation, and helper modules
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#### Tarpaulin Results
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- **Focused**: Primarily on main component files
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- **Limited Scope**: Only covers `default.rs` files in most cases
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- **Missing**: Test files, signal management, validation modules
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- **Infrastructure**: 0% coverage of test utilities and helper modules
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### File Coverage Breakdown
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#### Files with High Coverage (Both Tools)
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- `packages/leptos/card/src/default.rs`: 88.9% (Tarpaulin), 48.1% (llvm-cov)
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- `packages/leptos/button/src/default.rs`: 27.7% (Tarpaulin), 85.2% (llvm-cov)
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#### Files with Zero Coverage (Tarpaulin Only)
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- `packages/leptos/button/src/signal_managed.rs`: 0/135 lines
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- `packages/leptos/button/src/new_york.rs`: 0/54 lines
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- `packages/leptos/card/src/signal_managed.rs`: 0/138 lines
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- `packages/leptos/card/src/new_york.rs`: 0/54 lines
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- All test utility files: 0% coverage
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- All validation modules: 0% coverage
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## Tool Strengths and Weaknesses
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### llvm-cov Advantages
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1. **Comprehensive Coverage**: Includes all source files and tests
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2. **Accurate Metrics**: More realistic coverage percentages
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3. **Detailed Reports**: Excellent HTML reports with line-by-line analysis
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4. **Test Inclusion**: Properly accounts for test coverage
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5. **Infrastructure Coverage**: Includes utility and helper modules
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### llvm-cov Disadvantages
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1. **Slower Execution**: Takes longer to run
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2. **Complex Setup**: Requires LLVM toolchain
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3. **Memory Usage**: Higher memory consumption
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4. **Dependency Issues**: Can fail on compilation errors
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### Tarpaulin Advantages
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1. **Fast Execution**: Quicker test runs
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2. **Simple Setup**: Easy to install and use
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3. **CI/CD Integration**: Excellent for continuous integration
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4. **Multiple Output Formats**: Flexible reporting options
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5. **Reliable**: Less prone to compilation failures
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### Tarpaulin Disadvantages
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1. **Limited Scope**: Doesn't include test files by default
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2. **Incomplete Metrics**: Lower coverage percentages due to scope
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3. **Missing Infrastructure**: Doesn't cover utility modules
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4. **Less Detailed**: Fewer analysis options
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## Recommendations
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### For Development Teams
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1. **Use llvm-cov for comprehensive analysis** when you need:
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- Complete coverage metrics including tests
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- Detailed line-by-line analysis
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- Infrastructure and utility coverage
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- Accurate coverage percentages
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2. **Use Tarpaulin for CI/CD and quick checks** when you need:
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- Fast feedback in continuous integration
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- Quick coverage validation
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- Simple setup and execution
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- Reliable results without compilation issues
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### For Coverage Goals
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- **Target 90%+ coverage using llvm-cov metrics** (more realistic)
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- **Use Tarpaulin for monitoring coverage trends** in CI/CD
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- **Focus on component coverage** using llvm-cov results
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- **Monitor infrastructure coverage** using llvm-cov
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## Implementation Strategy
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### Phase 1: Fix Compilation Issues
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1. Resolve `contract-testing` package compilation errors
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2. Fix `tailwind-rs-core` test failures
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3. Ensure all packages compile successfully
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### Phase 2: Comprehensive Coverage Analysis
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1. Run llvm-cov on all packages
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2. Generate detailed HTML reports
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3. Identify specific coverage gaps
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4. Create targeted test plans
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### Phase 3: Coverage Improvement
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1. Implement missing tests for uncovered code
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2. Add integration tests for signal management
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3. Create validation tests for utility modules
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4. Monitor progress using both tools
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## Conclusion
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Both tools provide valuable insights, but serve different purposes:
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- **llvm-cov** is the tool of choice for comprehensive coverage analysis and achieving high coverage goals
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- **Tarpaulin** is excellent for continuous monitoring and quick feedback
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The significant difference in coverage percentages (62.5% vs 6.80%) highlights the importance of using the right tool for the right purpose. For achieving 90%+ coverage goals, llvm-cov provides the most accurate and actionable metrics.
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## Next Steps
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1. **Fix compilation issues** in problematic packages
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2. **Run llvm-cov on all packages** for complete analysis
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3. **Implement targeted tests** based on llvm-cov results
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4. **Set up Tarpaulin in CI/CD** for continuous monitoring
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5. **Track progress** using both tools for comprehensive coverage management
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