使用phpunit模拟抽象类中的具体方法

时间:2011-11-07 17:36:51

标签: php unit-testing mocking phpunit

有没有什么好方法可以使用PHPUnit在抽象类中模拟具体方法?

到目前为止我发现的是:

  • expect() - > will()使用抽象方法正常工作
  • 它不适用于具体方法。而是运行原始方法。
  • 使用mockbuilder并为setMethods()提供所有抽象方法和具体方法。但是,它要求您指定所有抽象方法,使测试变得脆弱且过于冗长。
  • MockBuilder :: getMockForAbstractClass()忽略setMethod()。


以下是一些单元测试,例如以上几点:

abstract class AbstractClass {
    public function concreteMethod() {
        return $this->abstractMethod();
    }

    public abstract function abstractMethod();
}


class AbstractClassTest extends PHPUnit_Framework_TestCase {
    /**
     * This works for abstract methods.
     */
    public function testAbstractMethod() {
        $stub = $this->getMockForAbstractClass('AbstractClass');
        $stub->expects($this->any())
                ->method('abstractMethod')
                ->will($this->returnValue(2));

        $this->assertSame(2, $stub->concreteMethod()); // Succeeds
    }

    /**
     * Ideally, I would like this to work for concrete methods too.
     */
    public function testConcreteMethod() {
        $stub = $this->getMockForAbstractClass('AbstractClass');
        $stub->expects($this->any())
                ->method('concreteMethod')
                ->will($this->returnValue(2));

        $this->assertSame(2, $stub->concreteMethod()); // Fails, concreteMethod returns NULL
    }

    /**
     * One way to mock the concrete method, is to use the mock builder,
     * and set the methods to mock.
     *
     * The downside of doing it this way, is that all abstract methods
     * must be specified in the setMethods() call. If you add a new abstract
     * method, all your existing unit tests will fail.
     */
    public function testConcreteMethod__mockBuilder_getMock() {
        $stub = $this->getMockBuilder('AbstractClass')
                ->setMethods(array('concreteMethod', 'abstractMethod'))
                ->getMock();
        $stub->expects($this->any())
                ->method('concreteMethod')
                ->will($this->returnValue(2));

        $this->assertSame(2, $stub->concreteMethod()); // Succeeds
    }

    /**
     * Similar to above, but using getMockForAbstractClass().
     * Apparently, setMethods() is ignored by getMockForAbstractClass()
     */
    public function testConcreteMethod__mockBuilder_getMockForAbstractClass() {
        $stub = $this->getMockBuilder('AbstractClass')
                ->setMethods(array('concreteMethod'))
                ->getMockForAbstractClass();
        $stub->expects($this->any())
                ->method('concreteMethod')
                ->will($this->returnValue(2));

        $this->assertSame(2, $stub->concreteMethod()); // Fails, concreteMethod returns NULL
    }
}

2 个答案:

答案 0 :(得分:15)

2年前有一个Pull请求,但文档中从未添加过该信息:https://github.com/sebastianbergmann/phpunit-mock-objects/pull/49

您可以在getMockForAbstractClass()的参数7中的数组中传递具体方法。

请参阅代码:https://github.com/andreaswolf/phpunit-mock-objects/blob/30ee7452caaa09c46421379861b4128ef7d95e2f/PHPUnit/Framework/MockObject/Generator.php#L225

答案 1 :(得分:4)

我在我的基本测试用例中覆盖getMock()以添加所有抽象方法,因为必须模拟它们。你可以毫无疑问地与建造者做类似的事情。

重要提示:您无法模拟私有方法。

public function getMock($originalClassName, $methods = array(), array $arguments = array(), $mockClassName = '', $callOriginalConstructor = TRUE, $callOriginalClone = TRUE, $callAutoload = TRUE) {
    if ($methods !== null) {
        $methods = array_unique(array_merge($methods, 
                self::getAbstractMethods($originalClassName, $callAutoload)));
    }
    return parent::getMock($originalClassName, $methods, $arguments, $mockClassName, $callOriginalConstructor, $callOriginalClone, $callAutoload);
}

/**
 * Returns an array containing the names of the abstract methods in <code>$class</code>.
 *
 * @param string $class name of the class
 * @return array zero or more abstract methods names
 */
public static function getAbstractMethods($class, $autoload=true) {
    $methods = array();
    if (class_exists($class, $autoload) || interface_exists($class, $autoload)) {
        $reflector = new ReflectionClass($class);
        foreach ($reflector->getMethods() as $method) {
            if ($method->isAbstract()) {
                $methods[] = $method->getName();
            }
        }
    }
    return $methods;
}