如何使用phpunit测试变量是否存在于函数中

Question

I am writing Unit-Tests for a Class looking like this:

class example {

    public function __construct($param1, $param2) {
        $this->param1 = $param1
        $this->param2 = $param2
    }
}

Is it possible to test if $this->param1 and $this->param2 exists after the constructor is executed? I already googled for this but didn't found a valid answer to this. I tried it with the Assertion contain, but this didn't work too.

Answer 1

If you want to see whether properties have been assigned the specified values in the resulting object, use Reflection class. In your example, if you properties are public:

public function testInitialParams()
{
    $value1 = 'foo';
    $value2 = 'bar';
    $example = new Example($value1, $value2); // note that Example is using 'Standing CamelCase'
    $sut = new \ReflectionClass($example);

    $prop1 = $sut->getProperty('param1');
    $prop1->setAccessible(true); // Needs to be done to access protected and private properties
    $this->assertEquals($prop2->getValue($example), $value1, 'param1 got assigned the correct value');

    $prop2 = $sut->getProperty('param2');
    $prop2->setAccessible(true);
    $this->assertEquals($prop2->getValue($example), $value2, 'param2 got assigned the correct value');
}