/** * @dataProvider simpleArrayProvider * * @param array $array */ public function testIntersectKey(array $array) { $secondArray = [1 => 'one', 2 => 'two', 3 => 'three']; $arrayzy = new A($array); $resultArrayzy = $arrayzy->intersectKey($secondArray); $resultArray = array_intersect_key($array, $secondArray); $this->assertImmutable($arrayzy, $resultArrayzy, $array, $resultArray); }