DMS\Filter\Filters\CallbackTest::testRuleWithNonClosure PHP Method

    public function testRuleWithNonClosure()
    {
        $this->rule->expects($this->once())->method('getInputType')->will($this->returnValue(CallbackRule::CLOSURE_TYPE));
        $this->rule->callback = "i'm not a closure";
        $result = $this->filter->apply($this->rule, 'value');
    }