/**
  * @param $data
  * @param $expected
  *
  * @dataProvider validateDataProvider
  */
 public function testValidate($data, $expected)
 {
     $this->directoryDataMock->expects($this->once())->method('getCountriesWithOptionalZip')->will($this->returnValue([]));
     $this->directoryDataMock->expects($this->never())->method('isRegionRequired');
     $this->model->setData($data);
     $this->assertEquals($expected, $this->model->validate());
 }