What are some best practices for achieving 100% code coverage in PHP tests?

Achieving 100% code coverage in PHP tests ensures that all parts of the code are being tested, leading to more reliable and robust software. To achieve this, it is important to write comprehensive test cases that cover all possible code paths, including edge cases and error scenarios. Additionally, using code coverage tools like PHPUnit can help identify areas of the code that are not being tested. 

// Example of achieving 100% code coverage in PHP tests using PHPUnit

// Test class for a sample function to be tested
class SampleTest extends PHPUnit\Framework\TestCase {
  
  public function testSampleFunction() {
    $sample = new Sample();
    
    // Test case for a specific scenario
    $this->assertEquals(5, $sample->add(2, 3));
    
    // Test case for an edge case
    $this->assertEquals(0, $sample->subtract(2, 2));
  }
}

// Class with sample functions to be tested
class Sample {
  
  public function add($a, $b) {
    return $a + $b;
  }
  
  public function subtract($a, $b) {
    return $a - $b;
  }
}

Keywords

code coverage PHP tests unit testing PHPUnit test coverage

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