1 files changed, 36 insertions, 0 deletions
diff --git a/browser/components/urlbar/tests/unit/test_UrlbarUtils_unEscapeURIForUI.js b/browser/components/urlbar/tests/unit/test_UrlbarUtils_unEscapeURIForUI.js
new file mode 100644
index 0000000000..6efc6711c6
--- /dev/null
+++ b/browser/components/urlbar/tests/unit/test_UrlbarUtils_unEscapeURIForUI.js
@@ -0,0 +1,36 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test for unEscapeURIForUI function in UrlbarUtils.
+ */
+
+"use strict";
+
+const TEST_DATA = [
+  {
+    description: "Test for characters including percent encoded chars",
+    input: "A%E3%81%82%F0%A0%AE%B7%21",
+    expected: "Aあ𠮷!",
+    testMessage: "Unescape given characters correctly",
+  },
+  {
+    description: "Test for characters over the limit",
+    input: "A%E3%81%82%F0%A0%AE%B7%21".repeat(
+      Math.ceil(UrlbarUtils.MAX_TEXT_LENGTH / 25)
+    ),
+    expected: "A%E3%81%82%F0%A0%AE%B7%21".repeat(
+      Math.ceil(UrlbarUtils.MAX_TEXT_LENGTH / 25)
+    ),
+    testMessage: "Return given characters as it is because of over the limit",
+  },
+];
+
+add_task(function () {
+  for (const { description, input, expected, testMessage } of TEST_DATA) {
+    info(description);
+
+    const result = UrlbarUtils.unEscapeURIForUI(input);
+    Assert.equal(result, expected, testMessage);
+  }
+});