Nsa Laravel Package

Getting Started

Minimal Steps

1. Installation:

   composer require --dev nyholm/nsa
   

   Ensure it’s listed under require-dev in composer.json to block production inclusion.

2. First Use Case: Test a private method in a Laravel Eloquent model or service. For example:

   use Nyholm\NSA\NSA;
   
   $user = new User();
   NSA::setProperty($user, 'email_verified_at', now());
   $result = NSA::invokeMethod($user, 'validateVerification', ['test@example.com']);
   $this->assertTrue($result);
   

3. Where to Look First:

   • README.md for core API methods (getProperty, setProperty, invokeMethod, getConstant).
   • Changelog for PHP version support (e.g., PHP 8.1+ optimizations in 1.3.1).

Implementation Patterns

Usage Patterns

1. Testing Private Model Methods:

   // Test a private model method (e.g., validation logic)
   $user = new User();
   NSA::setProperty($user, 'password', 'plaintext');
   $hashed = NSA::invokeMethod($user, 'hashPassword');
   $this->assertTrue(password_verify('plaintext', $hashed));
   

2. Static Property Access:

   // Test static properties in abstract classes (e.g., Laravel base models)
   $incrementing = NSA::getProperty('App\Models\Model', 'incrementing');
   $this->assertFalse($incrementing);
   

3. Bulk Property Inspection:

   // Debug object state during test development
   $properties = NSA::getProperties($user);
   $this->assertArrayHasKey('api_token', $properties);
   

4. Method Argument Handling:

   // Invoke private methods with arguments
   $result = NSA::invokeMethod(
       $service,
       'processOrder',
       ['order_id' => 123, 'status' => 'pending']
   );
   

5. Caching for Performance:

   // Cache method closures to avoid reflection overhead in loops
   $closure = NSA::getClosure($object, 'privateMethod');
   foreach ($data as $item) {
       $closure($item); // Faster than repeated NSA::invokeMethod
   }
   

Workflows

1. TDD for Private Logic:

   • Write tests for private methods before implementing them (e.g., private function calculateTax() in a service).
   • Use NSA to verify behavior without exposing the method publicly.

2. Legacy Code Refactoring:

   • Test private methods during incremental refactoring to ensure behavior isn’t broken.
   • Example: Refactor a monolithic User model by extracting private methods and testing them with NSA.

3. Fixture Setup:

   // Set up complex test data
   $user = new User();
   NSA::setProperty($user, 'trial_ends_at', now()->addDays(7));
   NSA::setProperty($user, 'is_admin', true);
   

4. Static Analysis:

   // Test static constants or properties in base classes
   $version = NSA::getConstant('App\Services\ApiService', 'VERSION');
   $this->assertEquals('1.0.0', $version);
   

Integration Tips

1. Laravel Service Container:

   • Resolve private methods in container-bound services:

     $service = app()->make(PrivateService::class);
     $result = NSA::invokeMethod($service, 'internalLogic');
     

2. Pest PHP:

   it('tests private method', function () {
       $user = new User();
       NSA::setProperty($user, 'name', 'Test User');
       expect(NSA::invokeMethod($user, 'getFullName'))->toBe('Test User');
   });
   

3. Avoid in Production:

   • Use composer.json constraints:

     "config": {
         "preferred-install": "dist",
         "sort-packages": true
     },
     "minimum-stability": "dev",
     "require-dev": {
         "nyholm/nsa": "^1.3"
     }
     

   • Add a CI check (e.g., phpunit.xml):

     <env name="NSA_ENABLED" value="true" />
     

4. Document Usage:

   • Annotate tests with NSA usage:

     // NSA: Testing private method due to legacy code constraints
     $result = NSA::invokeMethod($model, 'legacyValidation');
     

Gotchas and Tips

Pitfalls

1. Reflection Limitations:

   • Dynamic Properties: NSA cannot access dynamically added properties (use __get/__set workarounds).
   • Closures/Generators: Private methods using closures or generators may fail (reflection cannot inspect them).

2. PHP Version Quirks:

   • PHP 8.1+: NSA 1.3.1+ removes no-op method calls, which may break tests relying on side effects.
   • PHP 7.1–7.3: Use NSA 1.2.x for compatibility with older Laravel versions.

3. Static Method Calls:

   • Abstract Classes: Works for static properties (e.g., NSA::getProperty('AbstractModel', 'property')), but not for abstract static methods.
   • Traits: May fail if the trait’s static method conflicts with parent class namespaces.

4. Performance:

   • Avoid in Loops: Reflection is slow; cache closures or mock the method instead.
   • Memory Leaks: Large objects with many private properties may cause memory issues in long-running tests.

5. Testing Anti-Patterns:

   • Overuse: Testing only private methods without public APIs suggests poor design. Refactor to expose behavior.
   • Brittle Tests: Tests relying on NSA may break if the private method’s signature changes (use interfaces or abstract classes instead).

Debugging

1. Method Not Found:

   • Verify the method name and class exactly (case-sensitive).
   • Check for typos or namespace issues (e.g., App\Models\User vs. User).

2. Property Access Errors:

   • Ensure the property exists and is not dynamically generated (e.g., __get).
   • For static properties, use the fully qualified class name (e.g., \App\Models\User).

3. Argument Mismatches:

   • Use NSA::getClosure() to inspect method signatures:

     $closure = NSA::getClosure($object, 'methodName');
     $closure->getParameters(); // Debug expected arguments
     

4. CI Failures:

   • Lock webmozart/assert to ^1.0 to avoid breaking changes:

     composer require webmozart/assert:^1.0
     

Tips

1. Combine with Mockery:

   $mock = Mockery::mock(User::class)->makePartial();
   $mock->shouldReceive('privateMethod')->andReturn('mocked');
   NSA::invokeMethod($mock, 'privateMethod'); // Returns 'mocked'
   

2. Test Static Constants:

   $this->assertEquals(
       '1.0.0',
       NSA::getConstant('App\Services\ApiService', 'VERSION')
   );
   

3. Laravel-Specific:

   • Eloquent Models: Test private accessors/mutators:

     NSA::setProperty($user, 'attribute', 'value');
     $this->assertEquals('value', $user->getAttribute('attribute'));
     

   • Service Providers: Test private boot methods:

     $provider = new AuthServiceProvider(app());
     NSA::invokeMethod($provider, 'boot');
     

4. Extension Points:

   • Custom Assertions: Extend Pest/PHPUnit with NSA helpers:

     function assertPrivateMethodReturns($object, string $method, $expected) {
         $this->assertEquals($expected, NSA::invokeMethod($object, $method));
     }
     

   • Proxy Classes: Use NSA to generate proxy classes for testing (advanced).

5. Performance Optimization:

   • Cache NSA closures in test setup:

     beforeEach(function () {
         $this->privateMethod = NSA::getClosure($this->object, 'privateMethod');
     });
     

6. Avoid in Critical Paths:

   • Restrict NSA to non-critical test suites (e.g., unit tests) and avoid in:
     • Performance benchmarks.
     • Integration tests with external dependencies.
     • Tests that run in CI pipelines with strict timeouts.