public function testValidDataFormat()
{
$writer = new XlsWriter($this->filename, false);
$writer->open();
$writer->write(array('john "2', 'doe', '1'));
$writer->close();
$expected = '<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><meta name=ProgId content=Excel.Sheet><meta name=Generator content="https://github.com/sonata-project/exporter"></head><body><table><tr><td>john "2</td><td>doe</td><td>1</td></tr></table></body></html>';
$this->assertEquals($expected, trim(file_get_contents($this->filename)));
}