<?php>
    /**
     * @test
     */
    public function testValidation()
    {
        $element = new Zend_Form_Element_MultiCheckbox('c');
        $element->addMultiOptions(
            array(
                '1' => 1,
                '2' => 2,
                '3' => 3,
            )
        );
        $element->setRequired(true);

        $this->assertFalse($element->isValid(array()));
    }