1 files changed, 69 insertions, 0 deletions
diff --git a/browser/components/sessionstore/test/marionette/test_restore_loading_tab.py b/browser/components/sessionstore/test/marionette/test_restore_loading_tab.py
new file mode 100644
index 0000000000..f053081b02
--- /dev/null
+++ b/browser/components/sessionstore/test/marionette/test_restore_loading_tab.py
@@ -0,0 +1,69 @@
+# 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/.
+
+from urllib.parse import quote
+
+from marionette_harness import MarionetteTestCase, WindowManagerMixin
+
+
+def inline(doc):
+    return "data:text/html;charset=utf-8,{}".format(quote(doc))
+
+
+class TestRestoreLoadingPage(WindowManagerMixin, MarionetteTestCase):
+    def setUp(self):
+        super(TestRestoreLoadingPage, self).setUp()
+        self.delayed_page = self.marionette.absolute_url("slow")
+
+    def do_test(self, html, is_restoring_expected):
+        self.marionette.navigate(inline(html.format(self.delayed_page)))
+        link = self.marionette.find_element("id", "link")
+        link.click()
+
+        self.marionette.restart(in_app=True)
+
+        with self.marionette.using_context("chrome"):
+            urls = self.marionette.execute_script(
+                "return gBrowser.tabs.map(t => t.linkedBrowser.currentURI.spec);"
+            )
+
+        if is_restoring_expected:
+            self.assertEqual(
+                len(urls),
+                2,
+                msg="The tab opened should be restored",
+            )
+            self.assertEqual(
+                urls[1],
+                self.delayed_page,
+                msg="The tab restored is correct",
+            )
+        else:
+            self.assertEqual(
+                len(urls),
+                1,
+                msg="The tab opened should not be restored",
+            )
+
+        self.close_all_tabs()
+
+    def test_target_blank(self):
+        self.do_test("<a id='link' href='{}' target='_blank'>click</a>", True)
+
+    def test_target_other(self):
+        self.do_test("<a id='link' href='{}' target='other'>click</a>", False)
+
+    def test_by_script(self):
+        self.do_test(
+            """
+            <a id='link'>click</a>
+            <script>
+            document.getElementById("link").addEventListener(
+                "click",
+                () => window.open("{}", "_blank");
+            )
+            </script>
+            """,
+            False,
+        )