How can one test the functionality of multiple classes in PHP 8 without relying solely on theoretical knowledge?

To test the functionality of multiple classes in PHP 8, you can create unit tests using a testing framework like PHPUnit. These tests will allow you to verify that each class behaves as expected in isolation and when interacting with other classes. By writing test cases that cover different scenarios and edge cases, you can ensure that your classes are working correctly. 

// Example of testing multiple classes using PHPUnit

// Class to be tested
class Calculator {
    public function add($a, $b) {
        return $a + $b;
    }
}

// Test class for Calculator
class CalculatorTest extends PHPUnit\Framework\TestCase {
    public function testAdd() {
        $calculator = new Calculator();
        $result = $calculator->add(2, 3);
        $this->assertEquals(5, $result);
    }
}

Keywords

PHP 8 unit testing multiple classes functionality testing practical application

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