public function testPrepareDataSource()
{
$item = ['test_data' => 'some_data', 'field_name' => self::TEST_TIME];
$dateTime = new \DateTime(self::TEST_TIME);
$this->timezoneMock->expects($this->once())->method('date')->willReturn($dateTime);
$result = $this->model->prepareDataSource(['data' => ['items' => [$item]]]);
$this->assertEquals(self::TEST_TIME, $result['data']['items'][0]['field_name']);
}
