public function testGetWorksheetByTitleNotFound()
{
$spreadsheetMock = $this->getMockBuilder(Spreadsheet::class)->setMethods(["getWorksheetFeed"])->disableOriginalConstructor()->getMock();
$spreadsheetMock->expects($this->any())->method("getWorksheetFeed")->will($this->returnValue(new WorksheetFeed($this->getSimpleXMLElement("worksheet-feed"))));
$this->assertTrue($spreadsheetMock->getWorksheetByTitle("Sheet10") instanceof Worksheet);
}