How do I assert the result is an integer in PHPUnit?

Question

I would like to be able test that a result is an integer (1,2,3...) where the function could return any number, e.g.:

$new_id = generate_id(); 

I had thought it would be something like:

$this->assertInstanceOf('int', $new_id); 

But I get this error:

Argument #1 of PHPUnit_Framework_Assert::assertInstanceOf() must be a class or interface name

Answer 1

$this->assertInternalType("int", $id); 

Edit: As of PHPUnit 8, the answer is:

$this->assertIsInt($id);