在PHPUnit中测试具有依赖项的对象

class MyDependency {
    public function doSomething() {
        // ...
    }
}

class MyClass {
    private $dependency;

    public function __construct(MyDependency $dependency) {
        $this->dependency = $dependency;
    }

    public function myMethod() {
        $this->dependency->doSomething();
        // ...
    }
}

class MyClassTest extends PHPUnit\Framework\TestCase {
    public function testMyMethod() {
        // 创建模拟对象
        $dependencyMock = $this->createMock(MyDependency::class);

        // 设置模拟对象的行为
        $dependencyMock->expects($this->once())
            ->method('doSomething');

        // 创建主对象，并将模拟对象注入到主对象中
        $mainObj = new MyClass($dependencyMock);

        // 调用主对象的方法
        $mainObj->myMethod();
    }
}