public function testValuesSuccess()
 {
     $expected = [0 => 'bar', 1 => 'y'];
     $xao = new XArray(['foo' => 'bar', 'x' => 'y']);
     $obj = $xao->values();
     $this->assertCount(2, $obj);
     $this->assertEquals($expected, (array) $obj);
 }