[tests] add check in pagegenerators_tests.TestWantedFactoryGenerator
[tests] add check in pagegenerators_tests.TestWantedFactoryGenerator

Change-Id: I365dbcc739c16ac78c746cb64668b0b8a7eb076f

wikimedia/pywikibot-core,PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core