--- /dev/null
+# German special characters are replaced:
+häufig haufig
+
+# here the stemmer works okay, it maps related words to the same stem:
+abschließen abschliess
+abschließender abschliess
+abschließendes abschliess
+abschließenden abschliess
+
+Tisch tisch
+Tische tisch
+Tischen tisch
+
+Haus hau
+Hauses hau
+Häuser hau
+Häusern hau
+# here's a case where overstemming occurs, i.e. a word is
+# mapped to the same stem as unrelated words:
+hauen hau
+
+# here's a case where understemming occurs, i.e. two related words
+# are not mapped to the same stem. This is the case with basically
+# all irregular forms:
+Drama drama
+Dramen dram
+
+# replace "ß" with 'ss':
+Ausmaß ausmass
+
+# fake words to test if suffixes are cut off:
+xxxxxe xxxxx
+xxxxxs xxxxx
+xxxxxn xxxxx
+xxxxxt xxxxx
+xxxxxem xxxxx
+xxxxxer xxxxx
+xxxxxnd xxxxx
+# the suffixes are also removed when combined:
+xxxxxetende xxxxx
+
+# words that are shorter than four charcters are not changed:
+xxe xxe
+# -em and -er are not removed from words shorter than five characters:
+xxem xxem
+xxer xxer
+# -nd is not removed from words shorter than six characters:
+xxxnd xxxnd