How to unit test functions that use type hinting

Question

Lets say I have a class that contains a function that uses type hinting like this:

class Testable  {     function foo (Dependency $dependency)      {      } } 

And I want to unit test this class Testable using this code:

$dependencyMock = $this->getMockBuilder('Dependency')         ->disableOriginalConstructor()         ->getMock();   $testable = new Testable($dependencyMock); 

If I use PHPUnit to create a stub of $dependency and then try to call the function foo using this mock (like above), I will get a fatal error that says:

Argument 1 passed to function foo() must be an instance of Dependency, instance of Mock_Foo given

How can I unit test this function with PHPUnit and still stub $dependency?

Answer 1

Use full namespace when you use mocking, it will fix the mockery inheritance problem.

$dependencyMock = $this->getMockBuilder('\Some\Name\Space\Dependency')     ->disableOriginalConstructor()     ->getMock(); $testable = new Testable($dependencyMock);