PHPUnit_Framework_Constraint_IsEmpty::evaluate PHP Method

    public function evaluate($other)
    {
        return empty($other);
    }

    /**
     * @covers PHPUnit_Framework_Constraint_IsEmpty
     * @covers PHPUnit_Framework_TestFailure::exceptionToString
     */
    public function testConstraintIsEmpty2()
    {
        $constraint = new PHPUnit_Framework_Constraint_IsEmpty();
        try {
            $constraint->evaluate(array('foo'), 'custom message');
        } catch (PHPUnit_Framework_ExpectationFailedException $e) {
            $this->assertEquals(<<<EOF
custom message
Failed asserting that an array is empty.

EOF
, PHPUnit_Framework_TestFailure::exceptionToString($e));
            return;
        }
        $this->fail();
    }