Upstream Chrome on iOS source code [6/11].

ios/chrome/browser/ui/ntp/new_tab_page_perftest.mm

+// Copyright 2012 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 "base/test/ios/wait_util.h"
+#include "ios/chrome/browser/sessions/ios_chrome_tab_restore_service_factory.h"
+#import "ios/chrome/browser/tabs/tab_model.h"
+#include "ios/chrome/browser/test/perf_test_with_bvc_ios.h"
+#import "ios/chrome/browser/ui/browser_view_controller.h"
+#import "ios/chrome/browser/ui/browser_view_controller_dependency_factory.h"
+
+namespace {
+
+const NSTimeInterval kMaxUICatchupDelay = 2.0;  // seconds
+
+class NewTabPagePerfTest : public PerfTestWithBVC {
+ public:
+  NewTabPagePerfTest()
+      : PerfTestWithBVC("NTP - Create",
+                        "First Tab",
+                        "",
+                        false,
+                        false,
+                        true,
+                        10) {}
+
+ protected:
+  void SetUp() override {
+    PerfTestWithBVC::SetUp();
+    IOSChromeTabRestoreServiceFactory::GetInstance()->SetTestingFactory(
+        chrome_browser_state_.get(),
+        IOSChromeTabRestoreServiceFactory::GetDefaultFactory());
+  }
+  base::TimeDelta TimedNewTab() {
+    base::Time startTime = base::Time::NowFromSystemTime();
+    [bvc_ newTab:nil];
+    return base::Time::NowFromSystemTime() - startTime;
+  }
+  void SettleUI() {
+    base::test::ios::WaitUntilCondition(
+        nil, nullptr, base::TimeDelta::FromSecondsD(kMaxUICatchupDelay));
+  }
+};
+
+// Output format first test:
+// [*]RESULT NTP - Create: NTP Gentle Create First Tab= number ms
+// Output format subsequent average:
+// [*]RESULT NTP - Create: NTP Gentle Create= number ms
+TEST_F(NewTabPagePerfTest, OpenNTP_Gentle) {
+  RepeatTimedRuns("NTP Gentle Create",
+                  ^(int index) {
+                    return TimedNewTab();
+                  },
+                  ^{
+                    SettleUI();
+                  });
+}
+
+// Output format first test:
+// [*]RESULT NTP - Create: NTP Hammer Create First Tab= number ms
+// Output format subsequent average:
+// [*]RESULT NTP - Create: NTP Hammer Create= number ms
+TEST_F(NewTabPagePerfTest, OpenNTP_Hammer) {
+  RepeatTimedRuns("NTP Hammer Create",
+                  ^(int index) {
+                    return TimedNewTab();
+                  },
+                  nil);
+  // Allows the run loops to run before teardown.
+  SettleUI();
+}
+
+}  // anonymous namespace