1 files changed, 64 insertions, 0 deletions
diff --git a/comm/mail/test/browser/folder-display/browser_messageReloads.js b/comm/mail/test/browser/folder-display/browser_messageReloads.js
new file mode 100644
index 0000000000..e89793d865
--- /dev/null
+++ b/comm/mail/test/browser/folder-display/browser_messageReloads.js
@@ -0,0 +1,64 @@
+/* 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/. */
+
+/*
+ * Test that message reloads happen properly when the message pane is hidden,
+ * and then made visible again.
+ */
+
+"use strict";
+
+var {
+  assert_message_pane_hidden,
+  assert_message_pane_visible,
+  assert_selected_and_displayed,
+  be_in_folder,
+  close_tab,
+  make_message_sets_in_folders,
+  create_folder,
+  open_folder_in_new_tab,
+  select_click_row,
+  switch_tab,
+  toggle_message_pane,
+} = ChromeUtils.import(
+  "resource://testing-common/mozmill/FolderDisplayHelpers.jsm"
+);
+
+var folder;
+
+add_setup(async function () {
+  folder = await create_folder("MessageReloads");
+  await make_message_sets_in_folders([folder], [{ count: 1 }]);
+});
+
+add_task(async function test_message_reloads_work_with_message_pane_toggles() {
+  await be_in_folder(folder);
+
+  assert_message_pane_visible();
+  select_click_row(0);
+  // Toggle the message pane off, then on
+  toggle_message_pane();
+  assert_message_pane_hidden();
+  toggle_message_pane();
+  assert_message_pane_visible();
+  // Open a new tab with the same message
+  let tab = await open_folder_in_new_tab(folder);
+  // Toggle the message pane off
+  assert_message_pane_visible();
+  toggle_message_pane();
+  assert_message_pane_hidden();
+  // Go back to the first tab, and make sure the message is actually displayed
+  await switch_tab(0);
+  assert_message_pane_visible();
+  assert_selected_and_displayed(0);
+
+  close_tab(tab);
+
+  Assert.report(
+    false,
+    undefined,
+    undefined,
+    "Test ran to completion successfully"
+  );
+});