1 files changed, 67 insertions, 0 deletions
diff --git a/uriloader/exthandler/tests/mochitest/test_nullCharFile.xhtml b/uriloader/exthandler/tests/mochitest/test_nullCharFile.xhtml
new file mode 100644
index 0000000000..b153395e81
--- /dev/null
+++ b/uriloader/exthandler/tests/mochitest/test_nullCharFile.xhtml
@@ -0,0 +1,67 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <title>Test for Handling of null char</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<p id="display"></p>
+<iframe id="test"></iframe>
+<script type="text/javascript">
+var tests = [
+  ["test.html\u0000.png", "test.html_.png"],
+  ["test.html.\u0000png", "test.html._png"],
+];
+
+add_task(async function() {
+  function promiseMessage(messageName) {
+    return new Promise(resolve => {
+      chromeScript.addMessageListener(messageName, function listener(data) {
+        chromeScript.removeMessageListener(messageName, listener);
+        resolve(data);
+      });
+    });
+  }
+
+  let url = SimpleTest.getTestFileURL("HelperAppLauncherDialog_chromeScript.js");
+  let chromeScript = SpecialPowers.loadChromeScript(url);
+
+  function wrongAPICallListener(msg) {
+    ok(
+      false,
+      `Called ${msg} when always ask pref was set to ${
+        Services.prefs.getBoolPref(
+          "browser.download.always_ask_before_handling_new_types"
+        )
+      }, which shouldn't happen.`
+    );
+  }
+  chromeScript.addMessageListener("wrongAPICall", wrongAPICallListener);
+
+  for (let prefVal of [false, true]) {
+    info("Pushing pref");
+    await SpecialPowers.pushPrefEnv({
+      set: [["browser.download.always_ask_before_handling_new_types", prefVal]]
+    });
+    for (let [name, expected] of tests) {
+      let promiseName = promiseMessage("suggestedFileName");
+      const a = document.createElement('a');
+      // Pass an unknown mimetype so we don't "correct" the extension:
+      a.href = "data:application/baconizer;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAAAAAA6fptVAAAACklEQVQI12NgAAAAAgAB4iG8MwAAAABJRU5ErkJggg==";
+      a.download = name;
+      a.dispatchEvent(new MouseEvent('click'));
+      is((await promiseName), expected, "got the expected sanitized name");
+    }
+  }
+
+  // Clean up.
+  let promise = promiseMessage("unregistered");
+  chromeScript.sendAsyncMessage("unregister");
+  await promise;
+
+  chromeScript.removeMessageListener("wrongAPICall", wrongAPICallListener);
+  chromeScript.destroy();
+});
+</script>
+</body>
+</html>