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

ios/chrome/app/application_delegate/metrics_mediator_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/metrics_mediator.h"
+#import "ios/chrome/app/application_delegate/metrics_mediator_testing.h"
+
+#import <Foundation/Foundation.h>
+
+#include "base/mac/scoped_block.h"
+#include "base/mac/scoped_nsobject.h"
+#import "breakpad/src/client/ios/BreakpadController.h"
+#include "components/metrics/metrics_service.h"
+#import "ios/chrome/app/application_delegate/startup_information.h"
+#include "ios/chrome/browser/application_context.h"
+#import "ios/chrome/browser/metrics/previous_session_info.h"
+#import "ios/chrome/browser/metrics/previous_session_info_private.h"
+#import "ios/chrome/browser/tabs/tab_model.h"
+#import "ios/chrome/browser/ui/main/browser_view_information.h"
+#import "ios/chrome/test/base/scoped_block_swizzler.h"
+#import "ios/chrome/test/ocmock/OCMockObject+BreakpadControllerTesting.h"
+#include "net/base/network_change_notifier.h"
+#include "testing/platform_test.h"
+#import "third_party/ocmock/OCMock/OCMock.h"
+#include "third_party/ocmock/gtest_support.h"
+
+#pragma mark - connectionTypeChanged tests.
+
+// Mock class for testing MetricsMediator.
+@interface MetricsMediatorMock : MetricsMediator
+@property(nonatomic) NSInteger reportingValue;
+@property(nonatomic) NSInteger breakpadUpload;
+- (void)reset;
+- (void)setReporting:(BOOL)enableReporting;
+@end
+
+@implementation MetricsMediatorMock
+@synthesize reportingValue = _reportingValue;
+@synthesize breakpadUpload = _breakpadUpload;
+
+- (void)reset {
+  _reportingValue = -1;
+  _breakpadUpload = -1;
+}
+- (void)setBreakpadUploadingEnabled:(BOOL)enableUploading {
+  _breakpadUpload = enableUploading ? 1 : 0;
+}
+- (void)setReporting:(BOOL)enableReporting {
+  _reportingValue = enableReporting ? 1 : 0;
+}
+- (BOOL)isMetricsReportingEnabledWifiOnly {
+  return YES;
+}
+- (BOOL)areMetricsEnabled {
+  return YES;
+}
+
+@end
+
+// Gives the differents net::NetworkChangeNotifier::ConnectionType based on
+// scenario number.
+net::NetworkChangeNotifier::ConnectionType getConnectionType(int number) {
+  switch (number) {
+    case 0:
+      return net::NetworkChangeNotifier::CONNECTION_UNKNOWN;
+    case 1:
+      return net::NetworkChangeNotifier::CONNECTION_ETHERNET;
+    case 2:
+      return net::NetworkChangeNotifier::CONNECTION_WIFI;
+    case 3:
+      return net::NetworkChangeNotifier::CONNECTION_2G;
+    case 4:
+      return net::NetworkChangeNotifier::CONNECTION_3G;
+    case 5:
+      return net::NetworkChangeNotifier::CONNECTION_4G;
+    case 6:
+      return net::NetworkChangeNotifier::CONNECTION_NONE;
+    case 7:
+      return net::NetworkChangeNotifier::CONNECTION_BLUETOOTH;
+    default:
+      return net::NetworkChangeNotifier::CONNECTION_UNKNOWN;
+  }
+}
+
+// Gives the differents expected value based on scenario number.
+int getExpectedValue(int number) {
+  if (number > 2 && number < 6)
+    return 0;
+  return 1;
+}
+
+// Verifies that connectionTypeChanged correctly enables or disables the
+// uploading in the breakpad and in the metrics service.
+TEST(MetricsMediatorTest, connectionTypeChanged) {
+  [[PreviousSessionInfo sharedInstance] setIsFirstSessionAfterUpgrade:NO];
+  base::scoped_nsobject<MetricsMediatorMock> mock_metrics_helper(
+      [[MetricsMediatorMock alloc] init]);
+
+  // Checks all different scenarios.
+  for (int i = 0; i < 8; ++i) {
+    [mock_metrics_helper reset];
+    [mock_metrics_helper connectionTypeChanged:getConnectionType(i)];
+    EXPECT_EQ(getExpectedValue(i), [mock_metrics_helper reportingValue]);
+    EXPECT_EQ(getExpectedValue(i), [mock_metrics_helper breakpadUpload]);
+  }
+
+  // Checks that no new ConnectionType has been added.
+  EXPECT_EQ(net::NetworkChangeNotifier::CONNECTION_BLUETOOTH,
+            net::NetworkChangeNotifier::CONNECTION_LAST);
+}
+
+#pragma mark - logLaunchMetrics tests.
+
+// A block that takes as arguments the caller and the arguments from
+// UserActivityHandler +handleStartupParameters and returns nothing.
+typedef void (^logLaunchMetricsBlock)(id, const char*, int);
+
+class MetricsMediatorLogLaunchTest : public PlatformTest {
+ protected:
+  MetricsMediatorLogLaunchTest() : has_been_called_(FALSE) {}
+
+  void initiateMetricsMediator(BOOL coldStart, int tabCount) {
+    id mainTabModel = [OCMockObject mockForClass:[TabModel class]];
+    [[[mainTabModel stub] andReturnValue:@(tabCount)] count];
+    browser_view_information_ =
+        [OCMockObject mockForProtocol:@protocol(BrowserViewInformation)];
+    [[[browser_view_information_ stub] andReturn:mainTabModel] mainTabModel];
+
+    swizzle_block_.reset([^(id self, int numTab) {
+      has_been_called_ = YES;
+      // Tests.
+      EXPECT_EQ(tabCount, numTab);
+    } copy]);
+    if (coldStart) {
+      uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
+          [MetricsMediator class], @selector(recordNumTabAtStartup:),
+          swizzle_block_));
+    } else {
+      uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
+          [MetricsMediator class], @selector(recordNumTabAtResume:),
+          swizzle_block_));
+    }
+  }
+
+  void verifySwizzleHasBeenCalled() { EXPECT_TRUE(has_been_called_); }
+
+  id getBrowserViewInformation() { return browser_view_information_; }
+
+ private:
+  id browser_view_information_;
+  __block BOOL has_been_called_;
+  base::mac::ScopedBlock<logLaunchMetricsBlock> swizzle_block_;
+  std::unique_ptr<ScopedBlockSwizzler> uma_histogram_swizzler_;
+};
+
+// Verifies that the log of the number of open tabs is sent and verifies
+TEST_F(MetricsMediatorLogLaunchTest,
+       logLaunchMetricsWithEnteredBackgroundDate) {
+  // Setup.
+  BOOL coldStart = YES;
+  initiateMetricsMediator(coldStart, 23);
+
+  const NSTimeInterval kFirstUserActionTimeout = 30.0;
+
+  id startupInformation =
+      [OCMockObject niceMockForProtocol:@protocol(StartupInformation)];
+  [[[startupInformation stub] andReturnValue:@(coldStart)] isColdStart];
+  [[startupInformation expect]
+      expireFirstUserActionRecorderAfterDelay:kFirstUserActionTimeout];
+
+  id currentTabModel = [OCMockObject mockForClass:[TabModel class]];
+  [[[currentTabModel stub] andReturn:nil] currentTab];
+
+  id browserViewInformation = getBrowserViewInformation();
+  [[[browserViewInformation stub] andReturn:currentTabModel] currentTabModel];
+
+  [[NSUserDefaults standardUserDefaults]
+      setObject:[NSDate date]
+         forKey:metrics_mediator::kAppEnteredBackgroundDateKey];
+
+  // Action.
+  [MetricsMediator
+      logLaunchMetricsWithStartupInformation:startupInformation
+                      browserViewInformation:getBrowserViewInformation()];
+
+  // Tests.
+  NSDate* dateStored = [[NSUserDefaults standardUserDefaults]
+      objectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];
+  EXPECT_EQ(nil, dateStored);
+  verifySwizzleHasBeenCalled();
+  EXPECT_OCMOCK_VERIFY(startupInformation);
+}
+
+// Verifies that +logLaunchMetrics logs of the number of open tabs and nothing
+// more if the background date is not set;
+TEST_F(MetricsMediatorLogLaunchTest, logLaunchMetricsNoBackgroundDate) {
+  // Setup.
+  BOOL coldStart = NO;
+  initiateMetricsMediator(coldStart, 32);
+
+  id startupInformation =
+      [OCMockObject mockForProtocol:@protocol(StartupInformation)];
+  [[[startupInformation stub] andReturnValue:@(coldStart)] isColdStart];
+
+  [[NSUserDefaults standardUserDefaults]
+      removeObjectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];
+
+  // Action.
+  [MetricsMediator
+      logLaunchMetricsWithStartupInformation:startupInformation
+                      browserViewInformation:getBrowserViewInformation()];
+
+  // Tests.
+  verifySwizzleHasBeenCalled();
+}
+
+// Tests that +logDateInUserDefaults logs the date in UserDefaults.
+TEST(MetricsMediatorNoFixtureTest, logDateInUserDefaultsTest) {
+  // Setup.
+  [[NSUserDefaults standardUserDefaults]
+      removeObjectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];
+
+  NSDate* lastAppClose = [[NSUserDefaults standardUserDefaults]
+      objectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];
+
+  ASSERT_EQ(nil, lastAppClose);
+
+  // Action.
+  [MetricsMediator logDateInUserDefaults];
+
+  // Setup.
+  lastAppClose = [[NSUserDefaults standardUserDefaults]
+      objectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];
+  EXPECT_NE(nil, lastAppClose);
+}
+
+#pragma mark - processCrashReportsPresentAtStartup tests.
+
+class MetricsMediatorShutdownTypeTest : public testing::TestWithParam<int> {};
+
+// Verifies that the Breakpad controller gets called appropriately when
+// processCrashReportsPresentAtStartup is invoked.
+//
+// This parameterized test receives an int parameter that is the crash log
+// count waiting to be processed.
+TEST_P(MetricsMediatorShutdownTypeTest, ProcessCrashReportsPresentAtStartup) {
+  // Create a MainController.
+  base::scoped_nsobject<MetricsMediator> metric_helper(
+      [[MetricsMediator alloc] init]);
+
+  // Create a mock for BreakpadController and swizzle
+  // +[BreakpadController sharedInstance] to return the mock instead of the
+  // normal singleton instance.
+  base::scoped_nsobject<id> mock_breakpad_controller(
+      [[OCMockObject mockForClass:[BreakpadController class]] retain]);
+
+  id implementation_block = ^BreakpadController*(id self) {
+    return mock_breakpad_controller.get();
+  };
+  ScopedBlockSwizzler breakpad_controller_shared_instance_swizzler(
+      [BreakpadController class], @selector(sharedInstance),
+      implementation_block);
+
+  // Create the mock expectation for calling
+  // -[BreakpadController getCrashReportCount].
+  [mock_breakpad_controller cr_expectGetCrashReportCount:GetParam()];
+
+  // Now call the method under test and verify that the Breakpad controller got
+  // called appropriately.
+  [metric_helper processCrashReportsPresentAtStartup];
+  EXPECT_OCMOCK_VERIFY(mock_breakpad_controller.get());
+}
+
+INSTANTIATE_TEST_CASE_P(/* No InstantiationName */,
+                        MetricsMediatorShutdownTypeTest,
+                        ::testing::Values(0, 1, 42));