function testArrayInputInvalidCharsRemoval() { $invalidInputs = array(chr(240), chr(192), chr(200) . chr(210), 'something' . chr(244)); $field = new CM_FormField_Text(['name' => 'foo']); foreach ($invalidInputs as $input) { $filtered = $field->filterInput($input); $this->assertNotSame($filtered, $input); } }