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-rw-r--r--test/src/casefiddle-tests.el9
1 files changed, 9 insertions, 0 deletions
diff --git a/test/src/casefiddle-tests.el b/test/src/casefiddle-tests.el
index dcbe2e32c22..28895ec921e 100644
--- a/test/src/casefiddle-tests.el
+++ b/test/src/casefiddle-tests.el
@@ -306,4 +306,13 @@
(casefiddle-tests--check-syms "aa_bb cc_dd" "Aa_Bb Cc_Dd" "Aa_bb Cc_dd")
(casefiddle-tests--check-syms "Aa_Bb Cc_Dd" "Aa_Bb Cc_Dd" "Aa_Bb Cc_Dd"))
+(ert-deftest casefiddle-allflags ()
+ "Check that all-flags events are properly handled by `upcase'."
+ ;; U+00FF LATIN SMALL LETTER Y WITH DIAERESIS
+ ;; U+0178 LATIN CAPITAL LETTER Y WITH DIAERESIS
+ (should (= (upcase ?\xff)
+ ?\x178))
+ (should (= (upcase ?\A-\C-\H-\S-\s-\M-\xff)
+ ?\A-\C-\H-\S-\s-\M-\x178)))
+
;;; casefiddle-tests.el ends here