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-rw-r--r--test/lisp/custom-tests.el38
1 files changed, 38 insertions, 0 deletions
diff --git a/test/lisp/custom-tests.el b/test/lisp/custom-tests.el
index 766e4844988..e71b7913f06 100644
--- a/test/lisp/custom-tests.el
+++ b/test/lisp/custom-tests.el
@@ -151,4 +151,42 @@
(widget-apply field :value-to-internal origvalue)
"bar"))))))
+(defcustom custom--test-local-option 'initial
+ "Buffer-local user option for testing."
+ :group 'emacs
+ :type '(choice (const initial) (const changed))
+ :local t)
+
+(defcustom custom--test-permanent-option 'initial
+ "Permanently local user option for testing."
+ :group 'emacs
+ :type '(choice (const initial) (const changed))
+ :local 'permanent)
+
+(ert-deftest custom-test-local-option ()
+ "Test :local user options."
+ ;; Initial default values.
+ (should (eq custom--test-local-option 'initial))
+ (should (eq custom--test-permanent-option 'initial))
+ (should (eq (default-value 'custom--test-local-option) 'initial))
+ (should (eq (default-value 'custom--test-permanent-option) 'initial))
+ (let ((obuf (current-buffer)))
+ (with-temp-buffer
+ ;; Changed buffer-local values.
+ (setq custom--test-local-option 'changed)
+ (setq custom--test-permanent-option 'changed)
+ (should (eq custom--test-local-option 'changed))
+ (should (eq custom--test-permanent-option 'changed))
+ (should (eq (default-value 'custom--test-local-option) 'initial))
+ (should (eq (default-value 'custom--test-permanent-option) 'initial))
+ (with-current-buffer obuf
+ (should (eq custom--test-local-option 'initial))
+ (should (eq custom--test-permanent-option 'initial)))
+ ;; Permanent variable remains unchanged.
+ (kill-all-local-variables)
+ (should (eq custom--test-local-option 'initial))
+ (should (eq custom--test-permanent-option 'changed))
+ (should (eq (default-value 'custom--test-local-option) 'initial))
+ (should (eq (default-value 'custom--test-permanent-option) 'initial)))))
+
;;; custom-tests.el ends here