Question

The following code passes the test when run. How can I change this so that it complains about the difference between 123 and '123'?

$obj = $this->getMockBuilder('Namespace\Object')
    ->disableOriginalConstructor()
    ->getMock();
$obj
    ->expects($this->once())
    ->method('do')
    ->with($this->equalTo('123')); // String

$obj->do(123);

How can I enable strict data type checking?

Answer 1

The with function takes a PHPUnit_Framework_Constraint.

The list of those can be found in the source

What i think you are looking for is:

->with($this->identicalTo('123'));