Upstream Chrome on iOS source code [1/11].

ios/chrome/app/application_delegate/background_activity_unittest.mm

+// 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.
+
+#import "ios/chrome/app/application_delegate/background_activity.h"
+
+#import "ios/chrome/app/application_delegate/browser_launcher.h"
+#import "ios/chrome/app/application_delegate/metrics_mediator.h"
+#import "ios/chrome/browser/crash_report/crash_report_background_uploader.h"
+#import "ios/chrome/browser/metrics/previous_session_info.h"
+#import "ios/chrome/browser/metrics/previous_session_info_private.h"
+#import "ios/chrome/test/base/scoped_block_swizzler.h"
+#include "testing/platform_test.h"
+#import "third_party/ocmock/OCMock/OCMock.h"
+#import "third_party/ocmock/gtest_support.h"
+
+// Verifies that -application:performFetchWithCompletionHandler: calls the
+// browser launcher in background state and uploads the report.
+TEST(BackgroundActivityTest, performFetchWithCompletionHandler) {
+  // Setup.
+  [[PreviousSessionInfo sharedInstance] setIsFirstSessionAfterUpgrade:NO];
+
+  // MetricsMediator mock.
+  id metrics_mediator_mock =
+      [OCMockObject mockForClass:[MetricsMediator class]];
+  [[[metrics_mediator_mock stub] andReturnValue:@YES] areMetricsEnabled];
+  [[[metrics_mediator_mock stub] andReturnValue:@YES] isUploadingEnabled];
+
+  // BrowserLauncher mock.
+  id browser_launcher =
+      [OCMockObject mockForProtocol:@protocol(BrowserLauncher)];
+  [[browser_launcher expect]
+      startUpBrowserToStage:INITIALIZATION_STAGE_BACKGROUND];
+
+  // CrashReportBackgroundUploader swizzle.
+  __block BOOL crash_report_completion_handler_has_been_called = NO;
+  id implementation_block = ^(id self) {
+    crash_report_completion_handler_has_been_called = YES;
+  };
+  ScopedBlockSwizzler crash_report_completion_handler_swizzler(
+      [CrashReportBackgroundUploader class],
+      @selector(performFetchWithCompletionHandler:), implementation_block);
+
+  // Test.
+  [BackgroundActivity application:nil
+      performFetchWithCompletionHandler:nil
+                        metricsMediator:metrics_mediator_mock
+                        browserLauncher:browser_launcher];
+
+  // Check.
+  EXPECT_OCMOCK_VERIFY(browser_launcher);
+  EXPECT_TRUE(crash_report_completion_handler_has_been_called);
+}
+
+// Verifies that -handleEventsForBackgroundURLSession:completionHandler: calls
+// the browser launcher in background state.
+TEST(BackgroundActivityTest, handleEventsForBackgroundURLSession) {
+  // Setup.
+  // BrowserLauncher mock.
+  id browser_launcher =
+      [OCMockObject mockForProtocol:@protocol(BrowserLauncher)];
+  [[browser_launcher expect]
+      startUpBrowserToStage:INITIALIZATION_STAGE_BACKGROUND];
+
+  // Test.
+  [BackgroundActivity handleEventsForBackgroundURLSession:nil
+                                        completionHandler:^{
+                                        }
+                                          browserLauncher:browser_launcher];
+
+  // Check.
+  EXPECT_OCMOCK_VERIFY(browser_launcher);
+}