(Added) Enhance mutation testing coverage with logical condition tests #49
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- Add Mac/Mc prefix handling tests targeting LogicalAnd mutations - Implement single character optimisation tests for mutation coverage - Test edge cases where both conditions must be true for code paths - Verify proper handling of array vs string parameter combinations - Enhance test coverage for logical operators in nameFix and strReplace These tests specifically target mutation testing scenarios by validating that logical AND conditions work correctly. The new test methods ensure that both conditions in logical expressions must be satisfied for the intended behaviour to occur, improving the robustness of mutation testing coverage. Signed-off-by: Marjo van Lier <marjo.vanlier@gmail.com>
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Note Other AI code review bot(s) detectedCodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review. 📝 WalkthroughWalkthroughAdds two unit tests for StringManipulation: one for Mac/Mc prefix handling and one for single-character str_replace optimization, and updates .pr_agent.toml to disable auto-approval and require explicit review. No production code changes. Changes
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Claude finished @MarjovanLier's task —— View job Code Review Complete ✅Review Tasks:
Review SummaryThis PR adds excellent mutation testing coverage with well-designed test methods that specifically target logical AND conditions in the ✅ StrengthsCode Quality & Best Practices
Test Design Excellence
Security & Performance
🎯 Technical AnalysisNameFixTest.php -
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Summary of Changes
Hello @MarjovanLier, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request significantly enhances the mutation testing coverage for the StringManipulation library. It introduces new test cases specifically designed to validate logical AND conditions within the nameFix and strReplace functions, aiming to improve the robustness and quality assurance of the library.
Highlights
- Mutation Testing Enhancement: New tests added to specifically target and improve mutation testing coverage for logical AND conditions in core string manipulation functions.
- nameFix Function Testing: Introduced a dedicated test for nameFix to thoroughly check Mac/Mc prefix handling, including cases with and without spaces, multiple occurrences, and edge cases to ensure correct capitalization based on logical conditions.
- strReplace Function Testing: Added a new test for strReplace to verify the single character optimization logic, ensuring it correctly applies only when both necessary conditions are met, covering various input types and edge cases.
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Changelog updates: 🔄 2025-08-22 *Added
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Code Review
This pull request adds valuable test coverage for logical conditions in nameFix and strReplace functions, which is a great step towards improving mutation testing scores and overall code robustness. The new tests are comprehensive and cover important edge cases.
My review includes suggestions to refactor the new test methods in both NameFixTest.php and StrReplaceTest.php to use PHPUnit's data providers. This will improve the readability and maintainability of the tests by separating data from logic, making them easier to manage in the future.
| /** | ||
| * Test that Mac/Mc prefix handling requires both conditions to be true. | ||
| * This targets the LogicalAnd mutations in the nameFix function. | ||
| */ | ||
| public function testMacMcPrefixHandlingLogicalConditions(): void | ||
| { | ||
| // Test cases where 'mc' exists but is followed by a space (should NOT trigger fix) | ||
| self::assertEquals('Mc Donald', StringManipulation::nameFix('mc donald')); | ||
| self::assertEquals('Mc Lean', StringManipulation::nameFix('mc lean')); | ||
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| // Test cases where 'mac' exists but is followed by a space (should NOT trigger fix) | ||
| self::assertEquals('Mac Donald', StringManipulation::nameFix('mac donald')); | ||
| self::assertEquals('Mac Lean', StringManipulation::nameFix('mac lean')); | ||
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| // Test cases where 'mc' exists and is NOT followed by a space (SHOULD trigger fix) | ||
| self::assertEquals('McDonald', StringManipulation::nameFix('mcdonald')); | ||
| self::assertEquals('McLean', StringManipulation::nameFix('mclean')); | ||
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| // Test cases where 'mac' exists and is NOT followed by a space (SHOULD trigger fix) | ||
| self::assertEquals('MacDonald', StringManipulation::nameFix('macdonald')); | ||
| self::assertEquals('MacLean', StringManipulation::nameFix('maclean')); | ||
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| // Test cases where prefix doesn't exist at all | ||
| self::assertEquals("O'brien", StringManipulation::nameFix("o'brien")); | ||
| self::assertEquals('Johnson', StringManipulation::nameFix('johnson')); | ||
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| // Test complex cases with multiple occurrences | ||
| self::assertEquals('MacDonald-McDonald', StringManipulation::nameFix('macdonald-mcdonald')); | ||
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| // Test edge case where both conditions in OR would be true but should only trigger once | ||
| self::assertEquals('MacDonald Mac Smith', StringManipulation::nameFix('macdonald mac smith')); | ||
| } |
There was a problem hiding this comment.
For better test organization and readability, consider using a PHPUnit data provider for this test case. This approach separates the test data from the test logic, making it easier to add, remove, or understand individual test scenarios. Each test case can be clearly described by the data provider key.
/**
* Test that Mac/Mc prefix handling requires both conditions to be true.
* This targets the LogicalAnd mutations in the nameFix function.
*
* @dataProvider macMcPrefixHandlingLogicalConditionsProvider
*/
public function testMacMcPrefixHandlingLogicalConditions(string $input, string $expected): void
{
self::assertEquals($expected, StringManipulation::nameFix($input));
}
public static function macMcPrefixHandlingLogicalConditionsProvider(): \Generator
{
yield 'mc with space (should not trigger fix)' => ['mc donald', 'Mc Donald'];
yield 'mc with space 2 (should not trigger fix)' => ['mc lean', 'Mc Lean'];
yield 'mac with space (should not trigger fix)' => ['mac donald', 'Mac Donald'];
yield 'mac with space 2 (should not trigger fix)' => ['mac lean', 'Mac Lean'];
yield 'mc without space (should trigger fix)' => ['mcdonald', 'McDonald'];
yield 'mc without space 2 (should trigger fix)' => ['mclean', 'McLean'];
yield 'mac without space (should trigger fix)' => ['macdonald', 'MacDonald'];
yield 'mac without space 2 (should trigger fix)' => ['maclean', 'MacLean'];
yield "no prefix" => ["o'brien", "O'brien"];
yield 'no prefix 2' => ['johnson', 'Johnson'];
yield 'multiple occurrences' => ['macdonald-mcdonald', 'MacDonald-McDonald'];
yield 'edge case with multiple mac' => ['macdonald mac smith', 'MacDonald Mac Smith'];
}
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Claude finished @MarjovanLier's task —— View job
Analyzing Code Review Suggestion
Todo List:
- Read current test implementation
- Analyze gemini's data provider suggestion
- Provide opinion on refactoring approach
- Post complete analysis
My Opinion: Mixed - Context Matters
The gemini-code-assist suggestion to use data providers has both merits and drawbacks. Here's my analysis:
✅ Arguments FOR Data Providers
- Better test isolation: Each test case runs independently with clear failure reporting
- Cleaner separation: Test data is separated from test logic
- Easier maintenance: Adding new test cases only requires updating the data provider
- PHPUnit best practice: Data providers are the "standard" PHPUnit approach for parameterized tests
❌ Arguments AGAINST (In This Context)
- Loss of narrative flow: The current implementation tells a story about the logical conditions being tested
- Mutation testing focus: The current grouping emphasizes the specific logical AND conditions being targeted
- Documentation value: The current comments explain the "why" behind each group of assertions
- Cognitive overhead: Data providers add complexity for what is essentially a focused mutation test
🎯 Key Consideration: This Is Mutation Testing
The current test method is specifically designed for mutation testing with a clear narrative:
- "Test cases where prefix exists BUT followed by space → should NOT trigger fix"
- "Test cases where prefix exists and NOT followed by space → SHOULD trigger fix"
This logical grouping is intentional and helps developers understand exactly which logical AND conditions are being validated.
💡 My Recommendation: Keep Current Approach
For this specific test, I'd stick with the current implementation because:
- Clear intent: The method name and structure clearly communicate this is testing logical AND conditions
- Mutation testing focus: The grouping helps identify which mutations would be caught
- Self-documenting: The comments explain the logical conditions being tested
- Appropriate scope: 13 assertions is reasonable for a focused test method
🔄 Alternative: Hybrid Approach
If you wanted to get benefits of both approaches, you could split into multiple focused test methods rather than one data provider:
public function testMcPrefixWithSpace(): void { /* ... */ }
public function testMcPrefixWithoutSpace(): void { /* ... */ }
public function testMacPrefixWithSpace(): void { /* ... */ }
// etc.But honestly, the current approach is perfectly valid for a mutation-testing-focused test method.
Bottom line: The gemini suggestion isn't wrong, but the current approach better serves the specific purpose of testing logical AND conditions for mutation testing coverage.
--- | Branch: comprehensive-name-tests
| * Test that verifies both conditions are required for single character optimisation. | ||
| * This targets the LogicalAnd mutations in the strReplace function. | ||
| */ | ||
| public function testSingleCharacterOptimisationRequiresBothConditions(): void | ||
| { | ||
| // Use variables to avoid Psalm's literal string analysis | ||
| $testString = 'banana'; | ||
| $searchChar = 'a'; | ||
| $replaceChar = 'z'; | ||
| $expectedResult = 'bznznz'; | ||
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| // Case 1: Array search with single character - should NOT use strtr optimisation | ||
| $result1 = StringManipulation::strReplace([$searchChar], $replaceChar, $testString); | ||
| self::assertSame($expectedResult, $result1); | ||
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| // Case 2: Array types - should NOT use strtr optimisation | ||
| $result2 = StringManipulation::strReplace([$searchChar], [$replaceChar], $testString); | ||
| self::assertSame($expectedResult, $result2); | ||
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| // Case 3: Both string types but length > 1 - should NOT use strtr optimisation | ||
| $result3 = StringManipulation::strReplace('an', $replaceChar, $testString); | ||
| self::assertSame('bzza', $result3); | ||
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| // Case 4: Both conditions met - SHOULD use strtr optimisation | ||
| $result4 = StringManipulation::strReplace($searchChar, $replaceChar, $testString); | ||
| self::assertSame($expectedResult, $result4); | ||
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| // Case 5: Test empty string case - should NOT use strtr optimisation | ||
| $result5 = StringManipulation::strReplace('', $replaceChar, $testString); | ||
| self::assertSame($testString, $result5); | ||
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| // Case 6: Test longer string case - should NOT use strtr optimisation | ||
| $result6 = StringManipulation::strReplace('ban', 'can', $testString); | ||
| self::assertSame('canana', $result6); | ||
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| // All single-character replacements tested above should produce consistent results | ||
| // The individual assertions above verify that different code paths work correctly | ||
| } |
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To improve the structure and maintainability of this test, I suggest refactoring it to use a data provider. This will separate the test data from the assertion logic, making the test cleaner and easier to extend with new cases. The descriptive keys in the data provider will also make it clear what each test case is verifying.
/**
* Test that verifies both conditions are required for single character optimisation.
* This targets the LogicalAnd mutations in the strReplace function.
*
* @dataProvider singleCharacterOptimisationRequiresBothConditionsProvider
*/
public function testSingleCharacterOptimisationRequiresBothConditions(array|string $search, array|string $replace, string $subject, string $expected): void
{
self::assertSame($expected, StringManipulation::strReplace($search, $replace, $subject));
}
public static function singleCharacterOptimisationRequiresBothConditionsProvider(): \Generator
{
// Use variables to avoid Psalm's literal string analysis
$testString = 'banana';
$searchChar = 'a';
$replaceChar = 'z';
$expectedResult = 'bznznz';
yield 'Case 1: Array search, should not use strtr' => [
[$searchChar], $replaceChar, $testString, $expectedResult,
];
yield 'Case 2: Array types, should not use strtr' => [
[$searchChar], [$replaceChar], $testString, $expectedResult,
];
yield 'Case 3: Search string length > 1, should not use strtr' => [
'an', $replaceChar, $testString, 'bzza',
];
yield 'Case 4: Conditions met, should use strtr' => [
$searchChar, $replaceChar, $testString, $expectedResult,
];
yield 'Case 5: Empty search string, should not use strtr' => [
'', $replaceChar, $testString, $testString,
];
yield 'Case 6: Longer search string, should not use strtr' => [
'ban', 'can', $testString, 'canana',
];
}There was a problem hiding this comment.
Claude finished @MarjovanLier's task —— View job
Analyzing Gemini's Data Provider Suggestion
Todo List:
- Read current StrReplaceTest implementation
- Analyze gemini's data provider suggestion
- Consider pros/cons in mutation testing context
- Provide comprehensive opinion
My Opinion: Keep Current Approach ✅
The gemini-code-assist suggestion to use data providers has merit in general, but I strongly recommend keeping the current implementation for this specific test. Here's my detailed analysis:
✅ Why Current Approach Is Better Here
1. Mutation Testing Focus is Clear
The current method tells a coherent story about testing logical AND conditions:
- Variables setup (lines 136-140) shows the test scope
- Each case explicitly states which condition fails/succeeds
- Comments like "should NOT use strtr optimisation" vs "SHOULD use strtr optimisation" make the logical testing crystal clear
2. Logical Flow Documentation
The current structure teaches developers about the optimization logic:
// Case 1: Array search → condition 1 fails → no optimization
// Case 2: Array types → condition 1 fails → no optimization
// Case 3: Length > 1 → condition 2 fails → no optimization
// Case 4: Both conditions met → optimization triggersThis sequential narrative would be lost with data providers.
3. Smart Variable Usage
Lines 136-140 show sophisticated understanding:
// Use variables to avoid Psalm's literal string analysis
$testString = 'banana';
$searchChar = 'a';This demonstrates awareness of static analysis tools - something that would be harder to communicate in a data provider.
❌ Why Data Provider Would Be Suboptimal
1. Loss of Context
Data providers excel for parametric testing but this isn't really parametric - it's testing different logical conditions. Each case has a specific purpose in the logical AND validation.
2. Reduced Educational Value
The current implementation teaches mutation testing concepts. A data provider would just be a list of inputs/outputs without the "why" behind each case.
3. Maintenance Overhead
Adding new logical conditions would require updating both the data provider AND understanding the flow. The current approach makes it obvious where to add new cases.
🔍 Current Implementation Strengths
- Crystal clear intent: "This targets the LogicalAnd mutations in the strReplace function"
- Logical grouping: Cases progress through different failing conditions
- Self-documenting: Each assertion explains which condition is being tested
- Mutation testing optimized: Structure makes it obvious which mutations would be caught
💡 Alternative Suggestion
If you wanted to improve the current approach, I'd suggest minor enhancements rather than data providers:
// Add a comment explaining the logical AND being tested:
// Tests: is_string($search) && is_string($replace) && strlen($search) === 1🎯 Final Recommendation
Keep the current implementation. It's specifically designed for mutation testing, educational, and more maintainable for this use case. Data providers are excellent tools, but they're not always the right solution - particularly for tests that are teaching logical condition validation rather than running parametric scenarios.
The current approach perfectly serves the stated goal: "This targets the LogicalAnd mutations in the strReplace function."
View job | Branch: comprehensive-name-tests
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🧹 Nitpick comments (3)
tests/Unit/StrReplaceTest.php (1)
130-168: Add multibyte single-glyph coverage to avoid false “single char” optimizations.Guard against regressions where
strlen()is mistakenly swapped formb_strlen()or similar. A multibyte glyph likeé(UTF‑8 length > 1) should not enter the strtr fast‑path.Proposed additions:
@@ public function testSingleCharacterOptimisationRequiresBothConditions(): void + // Case 7: Multibyte single glyph (UTF-8) - should NOT use strtr optimisation + $result7 = StringManipulation::strReplace('é', 'e', 'Café'); + self::assertSame('Cafe', $result7);tests/Unit/NameFixTest.php (2)
85-116: Prefer strict assertions for string equality in new cases.Use
assertSamefor newly added string checks to avoid accidental type juggling and keep consistency with the new StrReplace tests.- self::assertEquals('Mc Donald', StringManipulation::nameFix('mc donald')); - self::assertEquals('Mc Lean', StringManipulation::nameFix('mc lean')); + self::assertSame('Mc Donald', StringManipulation::nameFix('mc donald')); + self::assertSame('Mc Lean', StringManipulation::nameFix('mc lean')); - self::assertEquals('Mac Donald', StringManipulation::nameFix('mac donald')); - self::assertEquals('Mac Lean', StringManipulation::nameFix('mac lean')); + self::assertSame('Mac Donald', StringManipulation::nameFix('mac donald')); + self::assertSame('Mac Lean', StringManipulation::nameFix('mac lean')); - self::assertEquals('McDonald', StringManipulation::nameFix('mcdonald')); - self::assertEquals('McLean', StringManipulation::nameFix('mclean')); + self::assertSame('McDonald', StringManipulation::nameFix('mcdonald')); + self::assertSame('McLean', StringManipulation::nameFix('mclean')); - self::assertEquals('MacDonald', StringManipulation::nameFix('macdonald')); - self::assertEquals('MacLean', StringManipulation::nameFix('maclean')); + self::assertSame('MacDonald', StringManipulation::nameFix('macdonald')); + self::assertSame('MacLean', StringManipulation::nameFix('maclean')); - self::assertEquals("O'brien", StringManipulation::nameFix("o'brien")); - self::assertEquals('Johnson', StringManipulation::nameFix('johnson')); + self::assertSame("O'brien", StringManipulation::nameFix("o'brien")); + self::assertSame('Johnson', StringManipulation::nameFix('johnson')); - self::assertEquals('MacDonald-McDonald', StringManipulation::nameFix('macdonald-mcdonald')); + self::assertSame('MacDonald-McDonald', StringManipulation::nameFix('macdonald-mcdonald')); - self::assertEquals('MacDonald Mac Smith', StringManipulation::nameFix('macdonald mac smith')); + self::assertSame('MacDonald Mac Smith', StringManipulation::nameFix('macdonald mac smith'));
85-116: Add mid-word and idempotency checks to harden edge cases.Two quick extras will further reduce mutation escapes:
- Mid-word prefix handling (not just at string start).
- Idempotency: running nameFix twice should be a no-op.
@@ public function testMacMcPrefixHandlingLogicalConditions(): void + // Mid-word occurrences should be handled correctly + self::assertSame('Tom McDonald', StringManipulation::nameFix('tom mcdonald')); + self::assertSame('Alice MacArthur', StringManipulation::nameFix('alice macarthur')); + + // Idempotency: applying nameFix twice should not alter a correct result + $once = StringManipulation::nameFix('macdonald'); + $twice = StringManipulation::nameFix($once); + self::assertSame($once, $twice);
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tests/Unit/StrReplaceTest.php (1)
src/StringManipulation.php (2)
StringManipulation(31-450)strReplace(272-285)
tests/Unit/NameFixTest.php (1)
src/StringManipulation.php (2)
StringManipulation(31-450)nameFix(128-179)
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🔇 Additional comments (2)
tests/Unit/StrReplaceTest.php (1)
130-168: Well-targeted AND-guard test kills common mutations.This suite neatly proves that the fast-path only triggers when both is_string checks and the single-character length check are satisfied. Cases 1–2 would fatally break under an
||mutation (misusing strtr with array keys), which is exactly what we want to detect. Nice use of variables to avoid literal analysis pitfalls.tests/Unit/NameFixTest.php (1)
85-116: Great coverage for Mac/Mc logic; catches OR-mutation instantly.These assertions clearly differentiate “prefix present but followed by space” vs “prefix not followed by space.” An
&& → ||mutation would incorrectly collapse “Mc X” to “McX,” and the tests will fail—exactly the intended safety net.
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@claude please fix
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Claude finished @MarjovanLier's task —— View job Fixed PR-Agent Manual Approval Configuration ✅Todo List:
Changes MadeI've successfully updated the Configuration Changes:
Result:PR-Agent will now require explicit manual approval before proceeding with automated actions, instead of automatically approving PRs. The "Manual-approval option for PR-Agent is disabled" message should no longer appear. Committed Changes:
The configuration is now active and PR-Agent should respect the manual approval requirement for future PR interactions. Branch: |
- Disable enable_auto_approval setting - Add require_approval = true configuration - Remove auto_approve commands from pr_commands and push_commands - PR-Agent will now require manual approval instead of automatic approval Co-authored-by: Marjo <MarjovanLier@users.noreply.github.com>
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🧹 Nitpick comments (1)
.pr_agent.toml (1)
44-58: auto_review block overrides extra_instructions to empty; likely unintendedWithin the triple-quoted auto_review block, line 55 passes --pr_reviewer.extra_instructions='' which overrides the earlier setting ("Please ensure comments are concise and actionable."). If you still want that guidance on push-triggered reviews, either drop the flag or set it to the same string.
Proposed fix (retain the earlier guidance):
- --pr_reviewer.extra_instructions='' \ + --pr_reviewer.extra_instructions='Please ensure comments are concise and actionable.' \Alternatively, to inherit from the TOML without overriding:
- --pr_reviewer.extra_instructions='' \ + # (inherit from [pr_reviewer]; remove explicit override)Also confirm the multiline TOML string is parsed as intended by PR-Agent (no stray indentation/backslashes altering flags).
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38-39: Slash command updated to /review — aligns with manual approval policySwitching pr_commands to "/review ..." removes the auto-approve path and keeps inline comments enabled. Looks good.
14-15: No residual auto-approval paths detected; config change approvedRan the repo-wide scan for
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User description
Summary
This contribution adds comprehensive test coverage specifically targeting mutation testing scenarios for the StringManipulation library. The enhancement introduces two sophisticated test methods that validate logical AND conditions in the
nameFixandstrReplacefunctions, ensuring robust mutation testing coverage and improving code quality assurance.The changes focus on testing edge cases where multiple conditions must be satisfied simultaneously, providing better detection of potential logical errors through mutation testing frameworks.
Changes Made
test: Test additions and improvementsAdded
testMacMcPrefixHandlingLogicalConditions()inNameFixTest.phpAdded
testSingleCharacterOptimisationRequiresBothConditions()inStrReplaceTest.phpTesting
Benefits
PR Type
Tests
Description
Add comprehensive mutation testing coverage for logical conditions
Test Mac/Mc prefix handling with logical AND requirements
Validate single character optimization with dual condition checks
Enhance edge case coverage for string manipulation functions
Diagram Walkthrough
File Walkthrough
NameFixTest.php
Add Mac/Mc prefix logical condition teststests/Unit/NameFixTest.php
testMacMcPrefixHandlingLogicalConditions()method with 13assertions
StrReplaceTest.php
Add single character optimization condition teststests/Unit/StrReplaceTest.php
testSingleCharacterOptimisationRequiresBothConditions()methodSummary by CodeRabbit