Update the `fingerprint` API unit-tests to explicitly check for the expected result
Update the `fingerprint` API unit-tests to explicitly check for the expected result

The current tests won't catch inadvertent changes to the logic used to obtain/compute the document `fingerprint`.

macroplant/pdf.js,mozilla/pdf.js,macroplant/pdf.js,mozilla/pdf.js,Snuffleupagus/pdf.js,showpad/mozilla-pdf.js,Snuffleupagus/pdf.js,Shoobx/pdf.js,caremerge/pdf.js,timvandermeij/pdf.js,Snuffleupagus/pdf.js,timvandermeij/pdf.js,mozilla/pdf.js,nawawi/pdf.js,Shoobx/pdf.js,macroplant/pdf.js,xavier114fch/pdf.js,mainegreen/pdf.js,mainegreen/pdf.js,showpad/mozilla-pdf.js,timvandermeij/pdf.js,nawawi/pdf.js,xavier114fch/pdf.js,nawawi/pdf.js,caremerge/pdf.js,Shoobx/pdf.js,showpad/mozilla-pdf.js