fix(design): clamp the gauge once so needle and readout agree

The needle angle clamped to 0-100 while the readout rendered the raw value, so a gauge fed 150 pinned the needle at +60 degrees under a "150%" label. A shared gallery-widget--clamp-value now feeds both halves.

Two hygiene fixes ride along. The module requires cl-lib explicitly instead of leaning on svg.el's transitive require. The token-file load resolves its directory through gallery-widget--source-dir, which falls back to default-directory when the form is re-evaluated outside a load and outside a file buffer (both location variables are nil there and file-name-directory errored).

1 files changed, 35 insertions, 0 deletions

diff --git a/tests/gallery-widgets/test-gallery-widget.el b/tests/gallery-widgets/test-gallery-widget.el
index 166cd59..de0c165 100644
--- a/tests/gallery-widgets/test-gallery-widget.el
+++ b/tests/gallery-widgets/test-gallery-widget.el
@@ -110,5 +110,40 @@
   "The readout shows a rounded integer percent, matching the web card."
   (should (string-match-p ">67%<" (test-gallery-widget--svg-string 66.6))))
 
+(ert-deftest gallery-widget-gauge-out-of-range-readout-clamps ()
+  "Readout and needle agree at out-of-range values: both clamp.
+Regression: the needle clamped to the dial ends while the readout rendered
+the raw value, so a gauge fed 150 pinned the needle at +60 degrees under a
+\"150%\" label."
+  (let ((over (test-gallery-widget--svg-string 150)))
+    (should (string-match-p ">100%<" over))
+    (should-not (string-match-p ">150%<" over)))
+  (let ((under (test-gallery-widget--svg-string -5)))
+    (should (string-match-p ">0%<" under))
+    (should-not (string-match-p ">-5%<" under))))
+
+(ert-deftest gallery-widget-source-dir-load-and-fallback ()
+  "The token-file directory resolves from load context, else default-directory.
+Regression: `file-name-directory' received nil when the load form was re-evaluated
+outside a load and outside a file buffer."
+  (let ((load-file-name "/tmp/proto/gallery-widget.el"))
+    (should (equal (gallery-widget--source-dir) "/tmp/proto/")))
+  (with-temp-buffer
+    (let ((load-file-name nil)
+          (default-directory "/tmp/elsewhere/"))
+      (should (equal (gallery-widget--source-dir) "/tmp/elsewhere/")))))
+
+(ert-deftest gallery-widget-requires-cl-lib-at-load-time ()
+  "Loading the module alone brings in cl-lib, not just an autoload cookie.
+A cold byte-compile or a changed autoload would otherwise break
+`gallery-widget--node' with a void-function error on first call."
+  (with-temp-buffer
+    (let ((emacs (expand-file-name invocation-name invocation-directory))
+          (widget (expand-file-name "docs/prototypes/gallery-widget.el"
+                                    test-gallery-widget--root)))
+      (call-process emacs nil t nil "--batch" "-l" widget
+                    "--eval" "(princ (if (featurep 'cl-lib) \"cl-lib:yes\" \"cl-lib:no\"))")
+      (should (string-match-p "cl-lib:yes" (buffer-string))))))
+
 (provide 'test-gallery-widget)
 ;;; test-gallery-widget.el ends here