Refactor UnitTestValidator to remove duplication of handling report from CoverageProcessing

[coderustic]

User description

Code to run tests and process coverage report is duplicated between run_coverage and validate_test. While the code in run_coverage is initializing last_coverage_percentages during initialization, the code in validate_test is updating the coverage percentages after adding generated tests.

This PR attempts to just combine the handling of Union(Tuple, dict) from CoverageProcessor as it return Union(Tuple, dict).

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PR Type

enhancement

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Description

• Refactored the UnitTestValidator class to eliminate duplicate code for handling coverage reports.
• Introduced a new method post_process_coverage_report to centralize the logic for processing coverage reports.
• Initialized the CoverageProcessor during the class construction to streamline its usage across methods.
• Simplified the logic for updating coverage percentages in the validate_test method, improving code maintainability.

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Changes walkthrough 📝

	Relevant files
Enhancement	UnitTestValidator.py Refactor and unify coverage report processing logic            cover_agent/UnitTestValidator.py Refactored to remove duplicate code for coverage processing. Introduced post_process_coverage_report method for unified coverage handling. Initialized CoverageProcessor in the constructor. Simplified coverage percentage updates in validate_test. +66/-97

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⚡ Recommended focus areas for review Incorrect Variable Reference The log message uses `coverage_percentages` but should use `new_coverage_percentages` to be consistent with the updated variable name Error Handling The new post_process_coverage_report method could fail with ZeroDivisionError but the error handling is only logged, not propagated to caller

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PR Code Suggestions ✨

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Category	Suggestion	Score
Possible issue	✅ Fix incorrect variable reference in logging statement to prevent undefined variable error ___ Suggestion Impact: The suggestion corrected the variable reference in the logging statement, replacing coverage_percentages with new_coverage_percentages to prevent an undefined variable error. code diff: ```diff - f"Coverage for provided source file: {key} increased from {round(self.last_coverage_percentages[key] * 100, 2)} to {round(coverage_percentages[key] * 100, 2)}" + f"Coverage for provided source file: {key} increased from {round(self.last_coverage_percentages[key] * 100, 2)} to {round(new_coverage_percentages[key] * 100, 2)}" ``` ___ **Fix incorrect variable reference in logging statement where coverage_percentages is used instead of new_coverage_percentages.** [cover_agent/UnitTestValidator.py [565-567]](https://github.com/Codium-ai/cover-agent/pull/209/files#diff-8e82655eb4312e27ba8b876368f619bb3fe73990d9c0ef379959a2b210141252R565-R567) ```diff self.logger.info( - f"Coverage for provided source file: {key} increased from {round(self.last_coverage_percentages[key] * 100, 2)} to {round(coverage_percentages[key] * 100, 2)}" + f"Coverage for provided source file: {key} increased from {round(self.last_coverage_percentages[key] * 100, 2)} to {round(new_coverage_percentages[key] * 100, 2)}" ) ``` - [ ] **Apply this suggestion** Suggestion importance[1-10]: 9 Why: The suggestion fixes a critical bug where an undefined variable 'coverage_percentages' is used instead of 'new_coverage_percentages', which would cause a runtime error when executing the logging statement.	9
	Initialize dictionary with existing values to prevent key access errors during comparison operations ___ **Initialize coverage_percentages dictionary with default values from self.last_coverage_percentages to avoid potential KeyError when comparing coverage values.** [cover_agent/UnitTestValidator.py [668-670]](https://github.com/Codium-ai/cover-agent/pull/209/files#diff-8e82655eb4312e27ba8b876368f619bb3fe73990d9c0ef379959a2b210141252R668-R670) ```diff def post_process_coverage_report(self, time_of_test_command): - coverage_percentages = {} + coverage_percentages = self.last_coverage_percentages.copy() if self.use_report_coverage_feature_flag: ``` - [ ] **Apply this suggestion** Suggestion importance[1-10]: 8 Why: The suggestion addresses a potential bug where comparing coverage values could raise KeyError exceptions. Initializing with existing values ensures consistent comparison and prevents runtime errors.	8

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