1 files changed, 15 insertions, 0 deletions
diff --git a/test/src/keyboard-tests.el b/test/src/keyboard-tests.el
index 1988ba51a76..970a53555f9 100644
--- a/test/src/keyboard-tests.el
+++ b/test/src/keyboard-tests.el
@@ -32,5 +32,20 @@
                         (read-event nil nil 2))
                  ?\C-b)))
 
+(ert-deftest keyboard-lossage-size ()
+  "Test `lossage-size'."
+  (let ((min-value 100)
+        (lossage-orig (lossage-size)))
+    (dolist (factor (list 1 3 4 5 10 7 3))
+      (let ((new-lossage (* factor min-value)))
+        (should (= new-lossage (lossage-size new-lossage)))))
+    ;; Wrong type
+    (should-error (lossage-size -5))
+    (should-error (lossage-size "200"))
+    ;; Less that minimum value
+    (should-error (lossage-size (1- min-value)))
+    (should (= lossage-orig (lossage-size lossage-orig)))))
+
+
 (provide 'keyboard-tests)
 ;;; keyboard-tests.el ends here