How do you test code that uses inheritance?

Testing code that uses inheritance is crucial for ensuring that both parent and child classes work as expected. By using unit tests, we can verify that the methods in both classes behave correctly. This approach is essential in object-oriented programming to maintain code quality and prevent regression issues.

inheritance, unit testing, object-oriented programming, parent class, child class, code quality, regression testing


        <?php
        class Animal {
            public function speak() {
                return "Some sound";
            }
        }

        class Dog extends Animal {
            public function speak() {
                return "Bark";
            }
        }

        // Unit test example
        class AnimalTest extends PHPUnit\Framework\TestCase {
            public function testAnimalSpeak() {
                $animal = new Animal();
                $this->assertEquals("Some sound", $animal->speak());
            }

            public function testDogSpeak() {
                $dog = new Dog();
                $this->assertEquals("Bark", $dog->speak());
            }
        }
        ?>

How do you test code that uses inheritance?

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How do you test code that uses inheritance?

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