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Implement comprehensive unit tests for ScubaArgumentParser (Issue #785) #851

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@gothiyag gothiyag commented Dec 4, 2025

Description

This PR implements comprehensive unit tests for the [ScubaArgumentParser] class, providing complete test coverage for all methods and functionality including argument parsing, configuration file integration, validation logic, and parameter alias handling.

Motivation and context

This change is required to establish a robust unit testing framework for the ScubaGoggles project as part of Epic #330. The [ScubaArgumentParser] class is a critical component that handles command-line argument parsing and YAML configuration file integration, but previously lacked comprehensive test coverage.

The implementation solves the testing gap by creating 13 comprehensive test methods that cover all class functionality including:

  • Basic argument parsing and configuration file integration
  • CLI argument precedence over config file values
  • Parameter alias translation (short form to long form)
  • Path string to Path object conversion
  • OrgName PascalCase conversion for ScubaGear compatibility
  • Policy ID validation with proper warning generation
  • Explicit CLI argument detection vs default values

Closes #785

Testing

Test Environment:

  • Python 3.11.9 with pytest 9.0.1 and pytest-mock 3.15.1
  • All tests run in isolated environments with proper mocking
  • Temporary file creation/cleanup for config file testing

Test Results:

============================= test session starts ============================== platform darwin -- Python 3.11.9, pytest-9.0.1, pluggy-1.6.0 collected 13 items

TestScubaArgumentParser::test_init PASSED [ 7%] TestScubaArgumentParser::test_parse_args PASSED [ 15%] TestScubaArgumentParser::test_parse_args_with_config_no_config PASSED [ 23%] TestScubaArgumentParser::test_parse_args_with_config_with_file PASSED [ 30%] TestScubaArgumentParser::test_get_explicit_cli_args PASSED [ 38%] TestScubaArgumentParser::test_validate_config_path_conversion PASSED [ 46%] TestScubaArgumentParser::test_validate_config_orgname_conversion PASSED [ 53%] TestScubaArgumentParser::test_validate_config_calls_validation_methods PASSED [ 61%] TestScubaArgumentParser::test_validate_omissions PASSED [ 69%] TestScubaArgumentParser::test_validate_annotations PASSED [ 76%] TestScubaArgumentParser::test_param_to_alias_mapping PASSED [ 84%] TestScubaArgumentParser::test_config_file_alias_translation PASSED [ 92%] TestScubaArgumentParser::test_cli_args_override_config PASSED [100%]

============================== 13 passed in 0.04s ==============================

Code Quality:

pylint score: 10.00/10 (perfect compliance)

Pre-approval checklist

  • This PR has an informative and human-readable title.
  • Changes are limited to a single goal - eschew scope creep!
  • If applicable, All future TODOs are captured in issues, which are referenced in the PR description.
  • The relevant issues PR resolves are linked preferably via closing keywords.
  • All relevant type-of-change labels have been added.
  • I have read and agree to the CONTRIBUTING.md document.
  • These code changes follow cisagov code standards.
  • All relevant repo and/or project documentation has been updated to reflect the changes in this PR.
  • Tests have been added and/or modified to cover the changes in this PR.
  • All new and existing tests pass.

Pre-merge Checklist

  • This PR has been smoke tested to ensure main is in a functional state when this PR is merged.
  • Squash all commits into one PR level commit using the Squash and merge button.

Post-merge Checklist

  • Delete the branch to clean up.
  • Close issues resolved by this PR if the closing keywords did not activate.

@gothiyag
Implement comprehensive unit tests for ScubaArgumentParser (Issue cis…
8535d76 
…agov#785)

Complete implementation of test_scuba_argument_parser.py with full coverage
of all ScubaArgumentParser class methods and functionality.

ACCEPTANCE CRITERIA MET:
- test_scuba_argument_parser.py file added
- TestScubaArgumentParser class implemented
- Test methods for each function in scuba_argument_parser.py

TEST COVERAGE (13 comprehensive test methods):
- test_init: Constructor and initialization
- test_parse_args: Basic argument parsing
- test_parse_args_with_config_no_config: No config file scenario
- test_parse_args_with_config_with_file: Config file integration
- test_get_explicit_cli_args: CLI argument detection (_get_explicit_cli_args)
- test_validate_config_path_conversion: Path string to Path object conversion
- test_validate_config_orgname_conversion: OrgName PascalCase conversion
- test_validate_config_calls_validation_methods: Method delegation
- test_validate_omissions: Policy ID omission validation
- test_validate_annotations: Policy ID annotation validation
- test_param_to_alias_mapping: Parameter alias mapping verification
- test_config_file_alias_translation: Short form to long form translation
- test_cli_args_override_config: CLI precedence over config file

TEST RESULTS:
============================= test session starts ==============================
platform darwin -- Python 3.11.9, pytest-9.0.1, pluggy-1.6.0
collected 13 items

test_scuba_argument_parser.py::TestScubaArgumentParser::test_init PASSED [  7%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_parse_args PASSED [ 15%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_parse_args_with_config_no_config PASSED [ 23%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_parse_args_with_config_with_file PASSED [ 30%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_get_explicit_cli_args PASSED [ 38%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_validate_config_path_conversion PASSED [ 46%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_validate_config_orgname_conversion PASSED [ 53%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_validate_config_calls_validation_methods PASSED [ 61%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_validate_omissions PASSED [ 69%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_validate_annotations PASSED [ 76%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_param_to_alias_mapping PASSED [ 84%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_config_file_alias_translation PASSED [ 92%]
test_scuba_argument_parser.py::TestScubaArgumentParser::test_cli_args_override_config PASSED [100%]

============================== 13 passed in 0.04s ==============================

PYLINT RESULTS:
-------------------------------------------------------------------
Your code has been rated at 10.00/10 (previous run: 9.94/10, +0.06)

KEY FEATURES TESTED:
- YAML config file parsing and integration
- CLI argument precedence over config file values
- Short/long parameter alias translation (b->baselines, o->outputpath, c->credentials)
- Path string to Path object conversion for file-related options
- OrgName/orgname PascalCase conversion for ScubaGear compatibility
- Policy ID validation with MarkdownParser integration
- Warning generation for invalid omission/annotation policy IDs
- Explicit CLI argument detection vs default values
- Temporary file handling with proper cleanup
- Comprehensive mocking of external dependencies

BEST PRACTICES IMPLEMENTED:
- pytest-mock instead of unittest.mock for better pytest integration
- Comprehensive pytest fixtures for reusable test data
- Proper mocking of external dependencies (MarkdownParser, warnings)
- Temporary file creation/cleanup for config file testing
- Protected access pylint disable comments for legitimate test access
- Class-based test structure as specified in requirements
- Descriptive test names and comprehensive docstrings
- Perfect code quality with 10.00/10 pylint score

Addresses issue cisagov#785 - Epic cisagov#330 Python unit testing framework
@gothiyag
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gothiyag commented Dec 4, 2025

@mitchelbaker-cisa Created PR for this issue #785

@FollyBeachGurl FollyBeachGurl added this to the Hammerhead milestone Jan 8, 2026
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@snarve snarve Awaiting requested review from snarve

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Create unit tests for scuba_argument_parser.py

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