Draft: Initial Proposal for redesign of coverage processor

coderustic commented 2 days ago

User description

Expose a unified interface for different formats ** CoverageData & CoverageReport
Class hierarchy of coverage processors that are initialized via a factory
CoverageProcessors are abstracted from feature flag
Filtering of report based on feature flag set

PR Type

enhancement, tests

Description

Introduced a new class hierarchy for processing coverage reports, including CoverageData and CoverageReport data classes.
Implemented specific processors for Cobertura, Lcov, and Jacoco coverage formats.
Added a factory class to create appropriate coverage processors based on the tool type.
Developed tests for the new coverage processor classes, ensuring correct functionality and coverage.
Made minor formatting adjustments in existing files.

Changes walkthrough 📝

Relevant files

Enhancement

processor.py

Implement coverage processing with a new class hierarchy

cover_agent/coverage/processor.py

Introduced a new class hierarchy for coverage processing.

Added CoverageData and CoverageReport data classes.

Implemented multiple coverage processors for different formats
(Cobertura, Lcov, Jacoco).

Added a factory class for creating coverage processors.

+300/-0

Tests

test_processor.py

Add tests for coverage processor classes

tests/coverage/test_processor.py

Added tests for CoverageProcessorFactory and CoverageProcessor.

Included tests for different coverage processors (Cobertura, Jacoco,
Lcov).

Used pytest fixtures and mock for testing.

+97/-0

Formatting

CoverageProcessor.py `Minor formatting adjustment` cover_agent/CoverageProcessor.py - Minor formatting change to ensure no newline at end of file.	+1/-1
test_CoverageProcessor.py `Remove unnecessary newline` tests/test_CoverageProcessor.py - Removed an unnecessary newline at the end of the file.	+0/-1

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⏱️ Estimated effort to review: 4 🔵🔵🔵🔵⚪

🧪 PR contains tests

🔒 No security concerns identified

⚡ Recommended focus areas for review

Potential Bug
The coverage percentage calculation in CoverageReportFilter.filter_report() may raise a ZeroDivisionError if all files are filtered out Type Error
The JacocoProcessor.parse_coverage_report() method creates CoverageData with incorrect parameter name 'coverage_percentag' (missing 'e') Code Smell
The JacocoProcessor._parse_jacoco_csv() method returns a tuple but its type hint indicates it returns a Dict[str, CoverageData] Documentation Issue
Typo in CoverageData class docstring - 'nubmers' instead of 'numbers' in missed_lines description

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PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Score
Possible issue	✅ Fix incorrect parameter name and provide all required arguments for dataclass instantiation ___ Suggestion Impact: The suggestion corrected the parameter name from 'coverage_percentag' to 'coverage_percentage' and added the required arguments 'covered_lines' and 'missed_lines' for the CoverageData instantiation. code diff: ```diff - coverage[class_name] = CoverageData(covered=covered, missed=missed, coverage_percentag=coverage_percentage) + coverage[class_name] = CoverageData(covered_lines=[], covered=covered, missed_lines=[], missed=missed, coverage=coverage_percentage) ``` ___ Fix the typo in the parameter name 'coverage_percentag' to 'coverage_percentage' when creating CoverageData in JacocoProcessor.parse_coverage_report() [cover_agent/coverage/processor.py [167]](https://github.com/Codium-ai/cover-agent/pull/230/files#diff-81d13b278c558460fab299cd119bd0e6664037283a87f31f22e8034378947c07R167-R167) ```diff -coverage[class_name] = CoverageData(covered=covered, missed=missed, coverage_percentag=coverage_percentage) +coverage[class_name] = CoverageData(covered_lines=[], covered=covered, missed_lines=[], missed=missed, coverage=coverage_percentage) ``` - [ ] Apply this suggestion Suggestion importance[1-10]: 9 Why: The suggestion fixes a critical bug where the code would fail at runtime due to incorrect parameter name and missing required arguments for the CoverageData dataclass, which is marked as frozen.	9
	✅ Add protection against division by zero when calculating coverage percentages ___ Suggestion Impact: The suggestion was implemented by adding a check for division by zero when calculating total_coverage, using total_lines to ensure it is greater than zero before performing the division. code diff: ```diff - total_coverage=(sum(cov.covered_lines for cov in filtered_coverage.values()) / - sum(cov.covered_lines + cov.missed_lines for cov in filtered_coverage.values())) - if filtered_coverage else 0.0, + total_lines = sum(len(cov.covered_lines) + len(cov.missed_lines) for cov in filtered_coverage.values()) + total_coverage = (sum(len(cov.covered_lines) for cov in filtered_coverage.values()) / total_lines) if total_lines > 0 else 0.0, ``` ___ Add error handling for division by zero when calculating total_coverage in CoverageReportFilter.filter_report() [cover_agent/coverage/processor.py [244-246]](https://github.com/Codium-ai/cover-agent/pull/230/files#diff-81d13b278c558460fab299cd119bd0e6664037283a87f31f22e8034378947c07R244-R246) ```diff -total_coverage=(sum(cov.covered_lines for cov in filtered_coverage.values()) / - sum(cov.covered_lines + cov.missed_lines for cov in filtered_coverage.values())) - if filtered_coverage else 0.0, +total_lines = sum(len(cov.covered_lines) + len(cov.missed_lines) for cov in filtered_coverage.values()) +total_coverage = (sum(len(cov.covered_lines) for cov in filtered_coverage.values()) / total_lines) if total_lines > 0 else 0.0, ``` - [ ] Apply this suggestion Suggestion importance[1-10]: 8 Why: The suggestion prevents potential runtime errors by adding proper handling for division by zero, and improves the calculation logic by using len() for list counts.	8
	Prevent race condition by capturing file modification time before processing ___ Fix potential race condition in process_coverage() by capturing file modification time before processing [cover_agent/coverage/processor.py [293]](https://github.com/Codium-ai/cover-agent/pull/230/files#diff-81d13b278c558460fab299cd119bd0e6664037283a87f31f22e8034378947c07R293-R293) ```diff -report = processor.process_coverage_report(time_of_test_command=int(os.path.getmtime(report_path) * 1000)) +report_mtime = int(os.path.getmtime(report_path) * 1000) +report = processor.process_coverage_report(time_of_test_command=report_mtime) ``` - [ ] Apply this suggestion Suggestion importance[1-10]: 7 Why: The suggestion prevents a potential race condition where the file modification time could change between when it's checked and when it's used, improving code reliability.	7

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