/** * Ensures that the filter follows expected behavior * * @return void */ public function testSingleStringNotation() { $filter = new Zend_Filter_Null('boolean'); $this->assertEquals('0', $filter->filter('0')); $this->assertEquals(null, $filter->filter('')); $this->assertEquals(0, $filter->filter(0)); $this->assertEquals(array(), $filter->filter(array())); $this->assertEquals(false, $filter->filter(false)); $this->assertEquals('test', $filter->filter('test')); $this->assertEquals(true, $filter->filter(true)); }