When mocking an interface in PHPUnit, PhpStorm complains when it's used as parameter for a type-hinted function.
Example
interface InterfaceA{
}
class ClassA{
public function foo(InterfaceA $foo){}
}
class PhpStormTest extends PHPUnit_Framework_TestCase
{
public function testFoo(){
$mock = $this->getMock("InterfaceA");
$a = new ClassA();
$a->foo($mock);
}
}
On $a->foo($mock);
PhpStorm underlines $mock
with the warning Expected InterfaceA, got PHPUnit_Framework_MockObject_MockObject
Image
I guess it's happening because PHPUnit creates the mock a runtime and PhpStorm cannot know that it's actually implementing the interface.
I found a workaround to this problem in the Jetbrain blog at PhpStorm Type Inference and Mocking Frameworks. The important part:
By default, PhpStorm is capable of figuring out the available methods on the mock object. However, it only displays those for PHPUnit’s PHPUnit_Framework_MockObject_MockObject class. Fortunately, we can solve this by instructing PhpStorm to infer type information from other classes as well, by using a simple docblock comment.
So to make the warning disappear, we need to add /** @var InterfaceA */
/** @var InterfaceA|PHPUnit_Framework_MockObject_MockObject */
(cudos to Supericy) to let PhpStorm know our mock actually implements InterfaceA
:
interface InterfaceA{
}
class ClassA{
public function foo(InterfaceA $foo){}
}
class PhpStormTest extends PHPUnit_Framework_TestCase
{
public function testFoo(){
/** @var InterfaceA|PHPUnit_Framework_MockObject_MockObject */
$mock = $this->getMock("InterfaceA");
$a = new ClassA();
$a->foo($mock);
}
}
This bugged me for some time, hope it helps someone :)
Edit
Since PHPUnit_Framework_MockObject_MockObject
is really ugly to type, you can abbreviate it via MOOMOO
and let PHPStorms auto-complete do the rest:
Another plugin I have used for this is the Dynamic Return Type Plugin, it lets you configure return types of methods in a very dynamic way (the example is to have better type information from Mocks).
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