1 files changed, 44 insertions, 0 deletions
diff --git a/services/sync/tests/unit/test_utils_makeGUID.js b/services/sync/tests/unit/test_utils_makeGUID.js
new file mode 100644
index 0000000000..dbd0aacbdc
--- /dev/null
+++ b/services/sync/tests/unit/test_utils_makeGUID.js
@@ -0,0 +1,44 @@
+const base64url =
+  "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_";
+
+function run_test() {
+  _("Make sure makeGUID makes guids of the right length/characters");
+  _("Create a bunch of guids to make sure they don't conflict");
+  let guids = [];
+  for (let i = 0; i < 1000; i++) {
+    let newGuid = Utils.makeGUID();
+    _("Generated " + newGuid);
+
+    // Verify that the GUID's length is correct, even when it's URL encoded.
+    Assert.equal(newGuid.length, 12);
+    Assert.equal(encodeURIComponent(newGuid).length, 12);
+
+    // Verify that the GUID only contains base64url characters
+    Assert.ok(
+      Array.prototype.every.call(newGuid, function(chr) {
+        return base64url.includes(chr);
+      })
+    );
+
+    // Verify that Utils.checkGUID() correctly identifies them as valid.
+    Assert.ok(Utils.checkGUID(newGuid));
+
+    // Verify uniqueness within our sample of 1000. This could cause random
+    // failures, but they should be extremely rare. Otherwise we'd have a
+    // problem with GUID collisions.
+    Assert.ok(
+      guids.every(function(g) {
+        return g != newGuid;
+      })
+    );
+    guids.push(newGuid);
+  }
+
+  _("Make sure checkGUID fails for invalid GUIDs");
+  Assert.ok(!Utils.checkGUID(undefined));
+  Assert.ok(!Utils.checkGUID(null));
+  Assert.ok(!Utils.checkGUID(""));
+  Assert.ok(!Utils.checkGUID("blergh"));
+  Assert.ok(!Utils.checkGUID("ThisGUIDisWayTooLong"));
+  Assert.ok(!Utils.checkGUID("Invalid!!!!!"));
+}