PHPUnit_Framework_Assert::identicalTo PHP Method

    public static function identicalTo($value)
    {
        return new PHPUnit_Framework_Constraint_IsIdentical($value);
    }

 /**
  * @covers PHPUnit_Framework_Constraint_IsIdentical
  * @covers PHPUnit_Framework_Constraint_Not
  * @covers PHPUnit_Framework_Assert::identicalTo
  * @covers PHPUnit_Framework_Assert::logicalNot
  */
 public function testConstraintIsNotIdentical2()
 {
     $a = new stdClass();
     $constraint = PHPUnit_Framework_Assert::logicalNot(PHPUnit_Framework_Assert::identicalTo($a));
     try {
         $constraint->fail($a, 'custom message', TRUE);
     } catch (PHPUnit_Framework_ExpectationFailedException $e) {
         $this->assertEquals("custom message\nFailed asserting that \nstdClass Object\n(\n)\n is not identical to an object of class \"stdClass\".", $e->getDescription());
         return;
     }
     $this->fail();
 }