vobject: add upstream tests

radicale_vobject/tests/test_files/badstream.ics

@@ -0,0 +1,16 @@
+BEGIN:VCALENDAR
+CALSCALE:GREGORIAN
+X-WR-TIMEZONE;VALUE=TEXT:US/Pacific
+METHOD:PUBLISH
+PRODID:-//Apple Computer\, Inc//iCal 1.0//EN
+X-WR-CALNAME;VALUE=TEXT:Example
+VERSION:2.0
+BEGIN:VEVENT
+DTSTART:20021028T140000Z
+BEGIN:VALARM
+TRIGGER:a20021028120000
+ACTION:DISPLAY
+DESCRIPTION:This trigger has a nonsensical value
+END:VALARM
+END:VEVENT
+END:VCALENDAR