PHPUnit: assertInstanceOf() not working

Question

I need to check if a variable is an object of the User type. User is my class $user my object

$this->assertInstanceOf($user,User);

Answer 1

Or You can use something like:

$this->assertInstanceOf(get_class($expectedObject), $user);

I usually use this when I'm checking i.e. if setter method is returning reference to self.

$testedObj = new ObjectToTest();
$this->assertInstanceOf(
    get_class($testedObj), 
    $testedObj->setSomething('someValue'),
    'Setter is not returning $this reference'
);