1 files changed, 67 insertions, 0 deletions
diff --git a/uriloader/exthandler/tests/mochitest/browser_standalone_application_chooser_window_fallback.js b/uriloader/exthandler/tests/mochitest/browser_standalone_application_chooser_window_fallback.js
new file mode 100644
index 0000000000..40496fb3b2
--- /dev/null
+++ b/uriloader/exthandler/tests/mochitest/browser_standalone_application_chooser_window_fallback.js
@@ -0,0 +1,67 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test the fallback fixed in bug 1875460, if the modern tab dialog box is not
+// supported.
+
+const TEST_URL =
+  "https://example.com/browser/" +
+  "uriloader/exthandler/tests/mochitest/FTPprotocolHandler.html";
+
+add_task(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [["security.external_protocol_requires_permission", false]],
+  });
+
+  // Load a page with an FTP link.
+  let browser = gBrowser.selectedBrowser;
+  BrowserTestUtils.startLoadingURIString(browser, TEST_URL);
+  await BrowserTestUtils.browserLoaded(browser, false, TEST_URL);
+
+  // Make sure no handler is set, forcing the dialog to show.
+  let protoSvc = Cc[
+    "@mozilla.org/uriloader/external-protocol-service;1"
+  ].getService(Ci.nsIExternalProtocolService);
+  let protoInfo = protoSvc.getProtocolHandlerInfo("ftp");
+  ok(!protoInfo.preferredApplicationHandler, "no preferred handler is set");
+  let handlers = protoInfo.possibleApplicationHandlers;
+  is(0, handlers.length, "no handler registered for ftp");
+  protoInfo.alwaysAskBeforeHandling = true;
+  let handlerSvc = Cc["@mozilla.org/uriloader/handler-service;1"].getService(
+    Ci.nsIHandlerService
+  );
+  handlerSvc.store(protoInfo);
+
+  // Delete getTabDialogBox from gBrowser, to test the fallback to the standalone
+  // application chooser window.
+  let _getTabDialogBox = gBrowser.getTabDialogBox;
+  delete gBrowser.getTabDialogBox;
+
+  let appChooserDialogOpenPromise = BrowserTestUtils.domWindowOpened(
+    null,
+    async win => {
+      await BrowserTestUtils.waitForEvent(win, "load");
+      Assert.ok(
+        win.document.documentURI ==
+          "chrome://mozapps/content/handling/appChooser.xhtml",
+        "application chooser dialog opened"
+      );
+      return true;
+    }
+  );
+  let link = "#link";
+  await BrowserTestUtils.synthesizeMouseAtCenter(link, {}, browser);
+  let appChooserDialog = await appChooserDialogOpenPromise;
+
+  let appChooserDialogClosePromise =
+    BrowserTestUtils.domWindowClosed(appChooserDialog);
+  let dialog = appChooserDialog.document.getElementsByTagName("dialog")[0];
+  let cancelButton = dialog.getButton("cancel");
+  cancelButton.click();
+  await appChooserDialogClosePromise;
+
+  // Restore the original getTabDialogBox(), to not affect other tests.
+  gBrowser.getTabDialogBox = _getTabDialogBox;
+});