XEmacs 21.4.10 "Military Intelligence".

[chise/xemacs-chise.git.1] / tests / automated / regexp-tests.el

diff --git a/tests/automated/regexp-tests.el b/tests/automated/regexp-tests.el
index 292abeb..b24296c 100644 (file)
--- a/tests/automated/regexp-tests.el
+++ b/tests/automated/regexp-tests.el
@@ -213,3 +213,42 @@
   (looking-at "Unmatchable text")
   (replace-match "")
   (Assert (looking-at "^buffer.$")))
+
+;; Test that trivial regexps reset unused registers
+;; Thanks to Martin Sternholm for the report.
+;; xemacs-beta <5blm6h2ki5.fsf@lister.roxen.com>
+(with-temp-buffer
+  (insert "ab")
+  (goto-char (point-min))
+  (re-search-forward "\\(a\\)")
+  ;; test the whole-match data, too -- one try scotched that, too!
+  (Assert (string= (match-string 0) "a"))
+  (Assert (string= (match-string 1) "a"))
+  (re-search-forward "b")
+  (Assert (string= (match-string 0) "b"))
+  (Assert (not (match-string 1))))
+
+;; Test word boundaries
+(Assert (= (string-match " \\<a" " a") 0))
+(Assert (= (string-match "a\\> " "a ") 0))
+(Assert (= (string-match " \\ba" " a") 0))
+(Assert (= (string-match "a\\b " "a ") 0))
+(Assert (= (string-match "\\ba" " a") 1))
+(Assert (= (string-match "a\\b" "a ") 0))
+;; should work at target boundaries
+(Assert (= (string-match "\\<a" "a") 0))
+(Assert (= (string-match "a\\>" "a") 0))
+(Assert (= (string-match "\\ba" "a") 0))
+(Assert (= (string-match "a\\b" "a") 0))
+;; but not if the "word" would be on the null side of the boundary!
+(Assert (not (string-match "\\<" "")))
+(Assert (not (string-match "\\>" "")))
+(Assert (not (string-match " \\<" " ")))
+(Assert (not (string-match "\\> " " ")))
+(Assert (not (string-match "a\\<" "a")))
+(Assert (not (string-match "\\>a" "a")))
+;; Expect these to fail :-(
+(Assert (not (string-match "\\b" "")))
+(Assert (not (string-match " \\b" " ")))
+(Assert (not (string-match "\\b " " ")))
+