[ios] Adds code to support the iOS Handoff feature.

ios/chrome/browser/device_sharing/device_sharing_manager_unittest.mm

+// Copyright 2015 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 "ios/chrome/browser/device_sharing/device_sharing_manager.h"
+
+#include <memory>
+
+#include "base/mac/foundation_util.h"
+#include "base/mac/scoped_nsobject.h"
+#import "components/handoff/handoff_manager.h"
+#include "components/sync_preferences/testing_pref_service_syncable.h"
+#include "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
+#include "ios/chrome/browser/pref_names.h"
+#include "ios/web/public/test/test_web_thread_bundle.h"
+#include "testing/platform_test.h"
+#import "third_party/ocmock/OCMock/OCMock.h"
+#import "third_party/ocmock/gtest_support.h"
+#include "url/gurl.h"
+
+@interface TestDeviceSharingManager : DeviceSharingManager
++ (HandoffManager*)createHandoffManager;
+@end
+
+@implementation TestDeviceSharingManager
++ (HandoffManager*)createHandoffManager {
+  return [OCMockObject niceMockForClass:[HandoffManager class]];
+}
+@end
+
+namespace {
+
+class DeviceSharingManagerTest : public PlatformTest {
+ protected:
+  DeviceSharingManagerTest()
+      : PlatformTest(),
+        kTestURL1("http://test_sharing_1.html"),
+        kTestURL2("http://test_sharing_2.html") {}
+
+  void SetUp() override {
+    PlatformTest::SetUp();
+    TestChromeBrowserState::Builder mainBrowserStateBuilder;
+    chrome_browser_state_ = mainBrowserStateBuilder.Build();
+    sync_preferences::TestingPrefServiceSyncable* prefs =
+        chrome_browser_state_->GetTestingPrefService();
+    [HandoffManager registerBrowserStatePrefs:prefs->registry()];
+    sharing_manager_.reset([[TestDeviceSharingManager alloc] init]);
+  }
+
+  void TearDown() override {
+    [sharing_manager_ updateBrowserState:NULL];
+    sharing_manager_.reset();
+  }
+
+  const GURL kTestURL1;
+  const GURL kTestURL2;
+  web::TestWebThreadBundle thread_bundle_;
+  std::unique_ptr<TestChromeBrowserState> chrome_browser_state_;
+  base::scoped_nsobject<DeviceSharingManager> sharing_manager_;
+};
+
+TEST_F(DeviceSharingManagerTest, NoMainBrowserState) {
+  EXPECT_FALSE([sharing_manager_ handoffManager]);
+  // Updating the active URL should be a no-op.
+  [sharing_manager_ updateActiveURL:GURL("http://test")];
+  EXPECT_FALSE([sharing_manager_ handoffManager]);
+}
+
+TEST_F(DeviceSharingManagerTest, ShareOneUrl) {
+  [sharing_manager_ updateBrowserState:chrome_browser_state_.get()];
+  EXPECT_TRUE([sharing_manager_ handoffManager]);
+  OCMockObject* mock_handoff_manager =
+      (OCMockObject*)[sharing_manager_ handoffManager];
+
+  [[mock_handoff_manager expect] updateActiveURL:kTestURL1];
+  [sharing_manager_ updateActiveURL:kTestURL1];
+  EXPECT_OCMOCK_VERIFY(mock_handoff_manager);
+}
+
+TEST_F(DeviceSharingManagerTest, ShareTwoUrls) {
+  [sharing_manager_ updateBrowserState:chrome_browser_state_.get()];
+  EXPECT_TRUE([sharing_manager_ handoffManager]);
+  OCMockObject* mock_handoff_manager =
+      (OCMockObject*)[sharing_manager_ handoffManager];
+
+  [[mock_handoff_manager expect] updateActiveURL:kTestURL1];
+  [[mock_handoff_manager expect] updateActiveURL:kTestURL2];
+  [sharing_manager_ updateActiveURL:kTestURL1];
+  [sharing_manager_ updateActiveURL:kTestURL2];
+  EXPECT_OCMOCK_VERIFY(mock_handoff_manager);
+}
+
+TEST_F(DeviceSharingManagerTest, ResetMainBrowserStateAfterShare) {
+  [sharing_manager_ updateBrowserState:chrome_browser_state_.get()];
+  EXPECT_TRUE([sharing_manager_ handoffManager]);
+  OCMockObject* mock_handoff_manager =
+      (OCMockObject*)[sharing_manager_ handoffManager];
+
+  [[mock_handoff_manager expect] updateActiveURL:kTestURL1];
+  [sharing_manager_ updateActiveURL:kTestURL1];
+  EXPECT_OCMOCK_VERIFY(mock_handoff_manager);
+
+  [sharing_manager_ updateBrowserState:NULL];
+  EXPECT_FALSE([sharing_manager_ handoffManager]);
+}
+
+TEST_F(DeviceSharingManagerTest, DisableHandoffViaPrefs) {
+  [sharing_manager_ updateBrowserState:chrome_browser_state_.get()];
+  EXPECT_TRUE([sharing_manager_ handoffManager]);
+  sync_preferences::TestingPrefServiceSyncable* prefs =
+      chrome_browser_state_->GetTestingPrefService();
+  prefs->SetBoolean(prefs::kIosHandoffToOtherDevices, false);
+  EXPECT_FALSE([sharing_manager_ handoffManager]);
+}
+
+}  // namespace