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feat: Adicionar melhorias de qualidade de código e testes no guia de implementação e documentação de testes
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‎docs/CODE-QUALITY-IMPROVEMENTS.md‎

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# Code Quality Improvements
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This document tracks significant code quality improvements made to the PivotPHP ReactPHP extension based on AI-assisted code review and best practices.
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## Overview
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A systematic code quality improvement session was conducted to address various issues identified by AI-powered code analysis tools. The improvements focused on test reliability, code maintainability, and PHPUnit best practices.
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## Improvements Made
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### 1. Test Output Buffer Isolation
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**Problem**: TestCase output buffer management could cause test interference
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**Location**: `tests/TestCase.php`
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**Solution**: Implemented proper buffer level tracking and isolation
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```php
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// Before: Only started buffer when none existed
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if (ob_get_level() === 0) {
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ob_start();
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}
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// After: Always start new buffer and track initial level
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$this->initialBufferLevel = ob_get_level();
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ob_start();
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// Cleanup only buffers we created
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while (ob_get_level() > $this->initialBufferLevel) {
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ob_end_clean();
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}
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```
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**Benefits**:
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- Eliminated PHPUnit "risky test" warnings
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- Ensured consistent test isolation
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- Prevented output buffer conflicts between tests
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### 2. Unused Variable Cleanup
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**Problem**: Unused variables creating maintenance overhead
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**Location**: `tests/Server/ReactServerTest.php`
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**Solution**: Removed unused `$serverAddress` variable
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```php
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// Removed unused variable
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// $serverAddress = '127.0.0.1:0';
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```
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### 3. Redundant Assertions Removal
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**Problem**: Meaningless `assertTrue(true)` assertions
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**Location**: Multiple test files
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**Solution**: Removed redundant assertions and used proper PHPUnit patterns
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```php
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// Before: Meaningless assertion
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self::assertTrue(true);
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// After: Proper PHPUnit expectation
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$this->expectNotToPerformAssertions();
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```
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### 4. Static Method Call Corrections
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**Problem**: Incorrect static calls to PHPUnit instance methods
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**Location**: Multiple test files
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**Solution**: Fixed static calls to use proper instance methods
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```php
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// Before: Incorrect static call
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self::expectNotToPerformAssertions();
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// After: Proper instance method call
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$this->expectNotToPerformAssertions();
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```
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### 5. Callback Verification Redesign
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**Problem**: Broken callback testing utility that never invoked callbacks
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**Location**: `tests/Helpers/AssertionHelper.php`
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**Solution**: Complete redesign of callback verification mechanism
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```php
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// Before: Broken implementation that never called callback
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public static function assertMethodCalledWith(TestCase $testCase, callable $callback, array $expectedArgs): void
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{
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$called = false;
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$actualArgs = [];
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// Callback wrapper that was never used
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$wrapper = function (...$args) use (&$called, &$actualArgs, $callback) {
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$called = true;
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$actualArgs = $args;
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return $callback(...$args);
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};
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// Direct assertion without using wrapper
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$testCase::assertTrue($called, 'Expected method to be called');
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$testCase::assertEquals($expectedArgs, $actualArgs, 'Method called with wrong arguments');
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}
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// After: Proper callback verifier pattern
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public static function createCallbackVerifier(TestCase $testCase, callable $callback, array $expectedArgs): array
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{
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$called = false;
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$actualArgs = [];
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$wrapper = function (...$args) use (&$called, &$actualArgs, $callback) {
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$called = true;
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$actualArgs = $args;
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return $callback(...$args);
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};
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$verifier = function () use (&$called, &$actualArgs, $expectedArgs, $testCase) {
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$testCase::assertTrue($called, 'Expected method to be called');
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$testCase::assertEquals($expectedArgs, $actualArgs, 'Method called with wrong arguments');
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};
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return [$wrapper, $verifier];
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}
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```
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**Usage Example**:
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```php
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[$wrapper, $verifier] = AssertionHelper::createCallbackVerifier($this, $callback, $expectedArgs);
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$result = $wrapper('arg1', 'arg2');
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$verifier(); // Verify callback was called with correct arguments
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```
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### 6. MockBrowser Implementation Verification
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**Problem**: Concern about unimplemented MockBrowser creation
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**Location**: `tests/Helpers/ResponseHelper.php`
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**Solution**: Verified existing implementation is complete and functional
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```php
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// Existing implementation is working correctly
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public static function createMockBrowser(array $responses = []): MockBrowser
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{
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$mockBrowser = new MockBrowser();
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foreach ($responses as $url => $response) {
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$mockBrowser->setResponse($url, $response);
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}
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return $mockBrowser;
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}
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```
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### 7. Ambiguous Status Code Assertions
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**Problem**: Test accepting either 400 or 500 status codes, making expectations unclear
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**Location**: `tests/Middleware/SecurityMiddlewareTest.php`
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**Solution**: Fixed to assert specific status code based on middleware behavior
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```php
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// Before: Ambiguous assertion
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self::assertTrue(
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$response->getStatusCode() === 400 || $response->getStatusCode() === 500,
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'Expected 400 or 500, got ' . $response->getStatusCode()
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);
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// After: Specific assertion matching middleware behavior
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self::assertEquals(400, $response->getStatusCode());
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// Also fixed test setup to properly remove Host header
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$request = (new ServerRequest(
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'GET',
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new Uri('http://example.com/test'),
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[]
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))->withoutHeader('Host');
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```
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## Testing Improvements
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### Output Buffer Management
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- TestCase now properly isolates output buffers
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- Tracks initial buffer level to avoid interfering with existing buffers
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- Only cleans up buffers it created
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### Callback Testing
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- New `createCallbackVerifier()` method provides reliable callback testing
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- Separates wrapper creation from verification
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- Allows proper testing of callback invocation and arguments
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### Assertion Clarity
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- Removed meaningless assertions
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- Used specific status code assertions instead of ranges
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- Proper PHPUnit method usage throughout
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## Code Quality Metrics
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### Before Improvements
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- PHPUnit "risky test" warnings
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- Unused variables in test files
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- Broken callback verification utility
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- Ambiguous test assertions
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### After Improvements
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- ✅ Clean test execution without warnings
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- ✅ No unused variables
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- ✅ Functional callback verification system
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- ✅ Clear and specific test assertions
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- ✅ Proper PHPUnit best practices
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## Validation
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All improvements were validated through:
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1. **Unit Tests**: All existing tests pass
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2. **Code Style**: PSR-12 compliance maintained
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3. **Static Analysis**: PHPStan level 9 compliance
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4. **Integration Tests**: Full server integration still works
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## Documentation Updates
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Updated documentation files:
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- **TESTING-GUIDE.md**: Added best practices for new testing patterns
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- **IMPLEMENTATION_GUIDE.md**: Documented test quality improvements
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- **CODE-QUALITY-IMPROVEMENTS.md**: This comprehensive tracking document
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## Future Recommendations
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1. **Continuous Quality Monitoring**: Run regular code quality checks
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2. **Automated Reviews**: Integrate AI-powered code review in CI/CD
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3. **Test Coverage**: Maintain high test coverage with meaningful assertions
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4. **Documentation**: Keep implementation guides updated with learnings
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## Commands for Quality Assurance
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```bash
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# Run all quality checks
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composer quality:check
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# Run tests with coverage
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composer test:coverage
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# Check code style
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composer cs:check
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# Fix code style issues
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composer cs:fix
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# Run static analysis
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composer phpstan
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```
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---
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*This document serves as a reference for the systematic approach to code quality improvements and can be used as a template for future enhancement sessions.*

‎docs/IMPLEMENTATION_GUIDE.md‎

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}
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```
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### 5. Test Quality Improvements
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**Recent Enhancements** (v0.0.2+):
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1. **Output Buffer Isolation**: TestCase now properly manages output buffers to prevent test interference
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2. **Callback Verification**: AssertionHelper provides reliable callback testing utilities
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3. **Specific Assertions**: Tests use exact status codes instead of ranges for clear expectations
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4. **PHPUnit Best Practices**: Proper instance method usage for `expectNotToPerformAssertions()`
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```php
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// ✅ Improved callback testing
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[$wrapper, $verifier] = AssertionHelper::createCallbackVerifier($this, $callback, $expectedArgs);
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$result = $wrapper('arg1', 'arg2');
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$verifier(); // Verify callback was called with correct arguments
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// ✅ Specific status code assertions
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$this->assertEquals(400, $response->getStatusCode()); // Not 400 || 500
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// ✅ Proper header testing without automatic headers
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$request = (new ServerRequest('GET', new Uri('http://example.com')))->withoutHeader('Host');
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```
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## Performance Validation
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### Benchmarking Results

‎docs/TESTING-GUIDE.md‎

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}
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```
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### Testing Callback Verification
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```php
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public function testCallbackInvocation(): void
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{
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$expectedArgs = ['arg1', 'arg2'];
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$actualCallback = function ($arg1, $arg2) {
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return $arg1 . $arg2;
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};
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[$wrapper, $verifier] = AssertionHelper::createCallbackVerifier($this, $actualCallback, $expectedArgs);
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// Use the wrapper in your test
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$result = $wrapper('arg1', 'arg2');
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// Verify the callback was called with correct arguments
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$verifier();
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$this->assertEquals('arg1arg2', $result);
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}
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```
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### Testing Requests Without Headers
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```php
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public function testMissingHostHeader(): void
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{
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// Remove automatically added Host header
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$request = (new ServerRequest(
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'GET',
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new Uri('http://example.com/test'),
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[]
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))->withoutHeader('Host');
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$response = $this->middleware->process($request, $handler);
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// Assert specific status code, not ranges
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$this->assertEquals(400, $response->getStatusCode());
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}
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```
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### Performance Test Example
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```php
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3. **Assertions**: Use specific assertions for clarity
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4. **Mocking**: Mock external dependencies
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5. **Performance**: Skip heavy tests by default
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6. **Output Buffer Management**: TestCase automatically handles output buffer isolation
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7. **Callback Testing**: Use AssertionHelper::createCallbackVerifier() for proper callback verification
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8. **Error Assertions**: Assert specific status codes rather than ranges for clear expectations
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## Test Configuration
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‎tests/Security/RequestIsolationTest.php‎

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final class RequestIsolationTest extends TestCase
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{
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/**
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* Backup superglobals that might be modified during testing
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* @var array<string>
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* Custom backup of superglobals for isolation testing
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* @var array<string, mixed>
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*/
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protected $backupGlobals = ['_GET', '_POST', '_COOKIE', '_SESSION', '_FILES', '_SERVER'];
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private array $globalBackup = [];
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private RequestIsolation $isolation;
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parent::tearDown();
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}
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private array $globalBackup = [];
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/**
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* Safely backup superglobals for testing RequestIsolation functionality.
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* Note: This test specifically requires superglobal manipulation to test isolation behavior.

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