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-rw-r--r--lisp/textmodes/css-mode.el15
-rw-r--r--test/lisp/textmodes/css-mode-tests.el18
2 files changed, 22 insertions, 11 deletions
diff --git a/lisp/textmodes/css-mode.el b/lisp/textmodes/css-mode.el
index 8a4daac353a..608462b36a6 100644
--- a/lisp/textmodes/css-mode.el
+++ b/lisp/textmodes/css-mode.el
@@ -793,13 +793,14 @@ Completion candidates are looked up in `css-property-alist' by
the string PROPERTY."
(or (gethash property css--property-value-cache)
(let ((values
- (seq-mapcat
- (lambda (value)
- (if (stringp value)
- (list value)
- (or (css--value-class-lookup value)
- (css--property-values (symbol-name value)))))
- (cdr (assoc property css-property-alist)))))
+ (seq-uniq
+ (seq-mapcat
+ (lambda (value)
+ (if (stringp value)
+ (list value)
+ (or (css--value-class-lookup value)
+ (css--property-values (symbol-name value)))))
+ (cdr (assoc property css-property-alist))))))
(puthash property values css--property-value-cache))))
(defun css--complete-property-value ()
diff --git a/test/lisp/textmodes/css-mode-tests.el b/test/lisp/textmodes/css-mode-tests.el
index 805364c9f42..5d5873b301b 100644
--- a/test/lisp/textmodes/css-mode-tests.el
+++ b/test/lisp/textmodes/css-mode-tests.el
@@ -24,8 +24,9 @@
;;; Code:
-(require 'ert)
(require 'css-mode)
+(require 'ert)
+(require 'seq)
(ert-deftest css-test-property-values ()
;; The `float' property has a flat value list.
@@ -36,9 +37,10 @@
;; The `list-style' property refers to several other properties.
(should
(equal (sort (css--property-values "list-style") #'string-lessp)
- (sort (append (css--property-values "list-style-type")
- (css--property-values "list-style-position")
- (css--property-values "list-style-image"))
+ (sort (seq-uniq
+ (append (css--property-values "list-style-type")
+ (css--property-values "list-style-position")
+ (css--property-values "list-style-image")))
#'string-lessp)))
;; The `position' property is tricky because it's also the name of a
@@ -64,6 +66,14 @@
(should (equal (gethash "word-wrap" css--property-value-cache)
word-wrap-values))))
+(ert-deftest css-test-property-values-no-duplicates ()
+ "Test that `css--property-values' returns no duplicates."
+ ;; The `flex' property is prone to duplicate values; if they aren't
+ ;; removed, it'll contain at least two instances of `auto'.
+ (should
+ (equal (sort (css--property-values "flex") #'string-lessp)
+ '("auto" "content" "none"))))
+
(ert-deftest css-test-value-class-lookup ()
(should
(equal (sort (css--value-class-lookup 'position) #'string-lessp)