1 files changed, 29 insertions, 0 deletions
diff --git a/uriloader/exthandler/tests/unit/test_badMIMEType.js b/uriloader/exthandler/tests/unit/test_badMIMEType.js
new file mode 100644
index 0000000000..49c5e8d848
--- /dev/null
+++ b/uriloader/exthandler/tests/unit/test_badMIMEType.js
@@ -0,0 +1,29 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+function run_test() {
+  // "text/plain" has an 0xFF character appended to it.  This means it's an
+  // invalid string, which is tricky to enter using a text editor (I used
+  // emacs' hexl-mode).  It also means an ordinary text editor might drop it
+  // or convert it to something that *is* valid (in UTF8).  So we measure
+  // its length to make sure this hasn't happened.
+  var badMimeType = "text/plainÿ";
+  Assert.equal(badMimeType.length, 11);
+  try {
+    Cc["@mozilla.org/mime;1"]
+      .getService(Ci.nsIMIMEService)
+      .getFromTypeAndExtension(badMimeType, "txt");
+  } catch (e) {
+    if (
+      !(e instanceof Ci.nsIException) ||
+      e.result != Cr.NS_ERROR_NOT_AVAILABLE
+    ) {
+      throw e;
+    }
+    // This is an expected exception, thrown if the type can't be determined
+  }
+  // Not crashing is good enough
+  Assert.equal(true, true);
+}