Sonata\Exporter\Test\Source\PropelCollectionSourceIteratorTest::testDateTimeTransformation PHP Method

    public function testDateTimeTransformation()
    {
        $data = $this->extract($this->collection, array('id' => '[id]', 'created_at' => '[created_at]'));
        foreach ($data as $row) {
            $this->assertArrayHasKey('created_at', $row);
            $this->assertInternalType('string', $row['created_at']);
        }
    }