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Testing JSON Recovery Mechanisms in PR-agent

This test suite validates JSON handling functionality in the PR-agent tool, specifically focusing on handling incomplete JSON structures in code suggestion sections. The tests ensure proper parsing and recovery of partial JSON data in pull request analysis contexts.

Test Coverage Overview

The test suite provides comprehensive coverage for JSON parsing edge cases, particularly focusing on incomplete ‘Code suggestions’ sections.

Key areas tested include:

Basic incomplete JSON handling
Newline character handling in incomplete JSON
Multiple closing bracket scenarios
Partial field value handling

Implementation Analysis

The testing approach uses pytest fixtures to validate the try_fix_json function’s ability to handle malformed JSON inputs. The implementation follows a pattern of providing incomplete JSON strings and verifying they are correctly parsed into expected complete JSON structures.

Technical aspects include:

JSON string manipulation
Dictionary structure validation
Error recovery mechanisms

Technical Details

Testing tools and configuration:

Python’s built-in unittest framework
pytest for test execution
Custom JSON parsing utility (try_fix_json)
Dictionary comparison for assertion validation

Best Practices Demonstrated

The test suite demonstrates excellent testing practices through comprehensive edge case coverage and clear test organization. Notable practices include:

Descriptive test method names
Clear expected vs actual result comparisons
Consistent test structure across cases
Thorough documentation of test scenarios

codium-ai/pr-agent

tests/unittest/test_fix_output.py

            
# Generated by CodiumAI

from pr_agent.algo.utils import try_fix_json


class TestTryFixJson:
    # Tests that JSON with complete 'Code suggestions' section returns expected output
    def test_incomplete_code_suggestions(self):
        review = '{"PR Analysis": {"Main theme": "xxx", "Type of PR": "Bug fix"}, "PR Feedback": {"General PR suggestions": "..., `xxx`...", "Code suggestions": [{"relevant file": "xxx.py", "suggestion content": "xxx [important]"}, {"suggestion number": 2, "relevant file": "yyy.py", "suggestion content": "yyy [incomp...'  # noqa: E501
        expected_output = {
            'PR Analysis': {
                'Main theme': 'xxx',
                'Type of PR': 'Bug fix'
            },
            'PR Feedback': {
                'General PR suggestions': '..., `xxx`...',
                'Code suggestions': [
                    {
                        'relevant file': 'xxx.py',
                        'suggestion content': 'xxx [important]'
                    }
                ]
            }
        }
        assert try_fix_json(review) == expected_output

    def test_incomplete_code_suggestions_new_line(self):
        review = '{"PR Analysis": {"Main theme": "xxx", "Type of PR": "Bug fix"}, "PR Feedback": {"General PR suggestions": "..., `xxx`...", "Code suggestions": [{"relevant file": "xxx.py", "suggestion content": "xxx [important]"} 
\t, {"suggestion number": 2, "relevant file": "yyy.py", "suggestion content": "yyy [incomp...'  # noqa: E501
        expected_output = {
            'PR Analysis': {
                'Main theme': 'xxx',
                'Type of PR': 'Bug fix'
            },
            'PR Feedback': {
                'General PR suggestions': '..., `xxx`...',
                'Code suggestions': [
                    {
                        'relevant file': 'xxx.py',
                        'suggestion content': 'xxx [important]'
                    }
                ]
            }
        }
        assert try_fix_json(review) == expected_output

    def test_incomplete_code_suggestions_many_close_brackets(self):
        review = '{"PR Analysis": {"Main theme": "xxx", "Type of PR": "Bug fix"}, "PR Feedback": {"General PR suggestions": "..., `xxx`...", "Code suggestions": [{"relevant file": "xxx.py", "suggestion content": "xxx [important]"} 
, {"suggestion number": 2, "relevant file": "yyy.py", "suggestion content": "yyy }, [}
 ,incomp.}  ,..'  # noqa: E501
        expected_output = {
            'PR Analysis': {
                'Main theme': 'xxx',
                'Type of PR': 'Bug fix'
            },
            'PR Feedback': {
                'General PR suggestions': '..., `xxx`...',
                'Code suggestions': [
                    {
                        'relevant file': 'xxx.py',
                        'suggestion content': 'xxx [important]'
                    }
                ]
            }
        }
        assert try_fix_json(review) == expected_output

    def test_incomplete_code_suggestions_relevant_file(self):
        review = '{"PR Analysis": {"Main theme": "xxx", "Type of PR": "Bug fix"}, "PR Feedback": {"General PR suggestions": "..., `xxx`...", "Code suggestions": [{"relevant file": "xxx.py", "suggestion content": "xxx [important]"}, {"suggestion number": 2, "relevant file": "yyy.p'  # noqa: E501
        expected_output = {
            'PR Analysis': {
                'Main theme': 'xxx',
                'Type of PR': 'Bug fix'
            },
            'PR Feedback': {
                'General PR suggestions': '..., `xxx`...',
                'Code suggestions': [
                    {
                        'relevant file': 'xxx.py',
                        'suggestion content': 'xxx [important]'
                    }
                ]
            }
        }
        assert try_fix_json(review) == expected_output