Initial UKMPageLoadMetricsObserver

chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer_unittest.cc

Index: chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer_unittest.cc
diff --git a/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer_unittest.cc b/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..30608e8ec1b5537d289eeb13e8d6e504ae49f5c3
--- /dev/null
+++ b/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer_unittest.cc
@@ -0,0 +1,63 @@
+// Copyright 2017 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 "chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.h"
+
+#include "base/memory/ptr_util.h"
+#include "chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h"
+
+namespace {
+
+const char kDefaultTestUrl[] = "https://google.com";
+
+}  // namespace
+
+class UKMPageLoadMetricsObserverTest
+    : public page_load_metrics::PageLoadMetricsObserverTestHarness {
+ protected:
+  void RegisterObservers(page_load_metrics::PageLoadTracker* tracker) override {
+    tracker->AddObserver(
+        base::MakeUnique<ServiceWorkerPageLoadMetricsObserver>());
+  }
+
+  void SimulateTimingWithoutPaint() {
+    page_load_metrics::PageLoadTiming timing;
+    timing.navigation_start = base::Time::FromDoubleT(1);
+    SimulateTimingUpdate(timing);
+  }
+
+  void InitializeTestPageLoadTiming(page_load_metrics::PageLoadTiming* timing) {
+    timing->navigation_start = base::Time::FromDoubleT(1);
+    timing->parse_start = base::TimeDelta::FromMilliseconds(100);
+    timing->first_contentful_paint = base::TimeDelta::FromMilliseconds(300);
+    timing->dom_content_loaded_event_start =
+        base::TimeDelta::FromMilliseconds(600);
+    timing->load_event_start = base::TimeDelta::FromMilliseconds(1000);
+    PopulateRequiredTimingFields(timing);
+  }
+};
+
+TEST_F(UKMPageLoadMetricsObserverTest, NoMetrics) {
+  AssertNoServiceWorkerHistogramsLogged();
+  AssertNoInboxHistogramsLogged();
+}
+
+TEST_F(UKMPageLoadMetricsObserverTest, NoServiceWorker) {
+  page_load_metrics::PageLoadTiming timing;
+  InitializeTestPageLoadTiming(&timing);
+
+  NavigateAndCommit(GURL(kDefaultTestUrl));
+  SimulateTimingUpdate(timing);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramServiceWorkerFirstContentfulPaintInbox, 0);
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramServiceWorkerParseStartToFirstContentfulPaintInbox,
+      0);
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramServiceWorkerDomContentLoadedInbox, 0);
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramServiceWorkerLoadInbox, 0);
+}
+