public function testSpecificTypes()
{
// define type for specific cell
$writer = new XmlExcelWriter($this->filename, false, array('year' => 'String', 'surname' => 'Number'));
$writer->open();
$writer->write(array('name' => 'john', 'surname' => 'doe ', 'year' => '2001'));
$writer->close();
$expected = '<Row><Cell><Data ss:Type="String">john</Data></Cell><Cell><Data ss:Type="Number">doe </Data></Cell><Cell><Data ss:Type="String">2001</Data></Cell></Row>';
$this->assertTrue(strstr(file_get_contents($this->filename), $expected) !== false);
}