Fix restore of a tab from a recently-closed browser window

components/sessions/core/tab_restore_service_unittest.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/sessions/core/tab_restore_service.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace sessions {
+
+namespace {
+
+void PopulateTab(TabRestoreService::Tab* tab) {
+  tab->timestamp = base::Time::FromDoubleT(100.0);
+  tab->from_last_session = true;
+  tab->current_navigation_index = 42;
+  tab->browser_id = 1;
+  tab->tabstrip_index = 5;
+  tab->pinned = true;
+  tab->extension_app_id = "dummy";
+  tab->user_agent_override = "override";
+}
+
+void TestEntryEquality(TabRestoreService::Entry* reference,

[sky, 2016/07/19 17:42:40]

nit: how about naming the parameters here and on 32 as expected, actual to match
general assertions.

[blundell, 2016/07/20 08:18:12]

Done.

+                       TabRestoreService::Entry* test) {
+  EXPECT_EQ(reference->id, test->id);
+  EXPECT_EQ(reference->type, test->type);
+  EXPECT_EQ(reference->timestamp, test->timestamp);
+  EXPECT_EQ(reference->from_last_session, test->from_last_session);
+}
+
+void TestTabEquality(TabRestoreService::Tab* reference,
+                     TabRestoreService::Tab* test) {
+  TestEntryEquality(reference, test);
+  EXPECT_EQ(reference->current_navigation_index,
+            test->current_navigation_index);
+  EXPECT_EQ(reference->browser_id, test->browser_id);
+  EXPECT_EQ(reference->tabstrip_index, test->tabstrip_index);
+  EXPECT_EQ(reference->pinned, test->pinned);
+  EXPECT_EQ(reference->extension_app_id, test->extension_app_id);
+  EXPECT_EQ(reference->user_agent_override, test->user_agent_override);
+}
+
+TEST(Tab, CopyConstructor) {
+  TabRestoreService::Tab tab_to_copy;
+  PopulateTab(&tab_to_copy);
+
+  TabRestoreService::Tab copied_tab(tab_to_copy);
+  TestTabEquality(&tab_to_copy, &copied_tab);
+}
+
+TEST(Tab, AssignmentOperator) {
+  TabRestoreService::Tab tab_to_assign;
+  PopulateTab(&tab_to_assign);
+
+  TabRestoreService::Tab assigned_tab;
+  assigned_tab = tab_to_assign;
+  TestTabEquality(&tab_to_assign, &assigned_tab);
+}
+
+}  // namespace
+
+}  // namespace sessions