PageLoadMetrics renderer and browser implementation (deprecated)

components/page_load_metrics/browser/page_load_metrics_web_contents_observer_unittest.cc

Index: components/page_load_metrics/browser/page_load_metrics_web_contents_observer_unittest.cc
diff --git a/components/page_load_metrics/browser/page_load_metrics_web_contents_observer_unittest.cc b/components/page_load_metrics/browser/page_load_metrics_web_contents_observer_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6315b524ca97b17ca240a27a840641755cde3489
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+++ b/components/page_load_metrics/browser/page_load_metrics_web_contents_observer_unittest.cc
@@ -0,0 +1,80 @@
+// Copyright (c) 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 "components/page_load_metrics/browser/page_load_metrics_web_contents_observer.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "base/test/histogram_tester.h"
+#include "base/time/time.h"
+#include "components/page_load_metrics/common/page_load_metrics_messages.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace page_load_metrics {
+
+class PageLoadMetricsWebContentsObserverTest : public testing::Test {
+ public:
+  const char* kHistogramNameFirstLayout = "PageLoad.Timing.FirstLayout";
+  const char* kHistogramNameDomContent =
+      "PageLoad.Timing.DOMContentLoadedEventFired";
+  const char* kHistogramNameLoad = "PageLoad.Timing.LoadEventFired";
+
+  PageLoadMetricsWebContentsObserverTest() : observer_(nullptr) {}
+
+ protected:
+  base::HistogramTester histogram_tester_;
+  PageLoadMetricsWebContentsObserver observer_;
+};
+
+// These tests no longer work and need to be updated.
+
+#if 0
+
+TEST_F(PageLoadMetricsWebContentsObserverTest, NoMetrics) {
+  histogram_tester_.ExpectTotalCount(kHistogramNameDomContent, 0);
+  histogram_tester_.ExpectTotalCount(kHistogramNameLoad, 0);
+  histogram_tester_.ExpectTotalCount(kHistogramNameFirstLayout, 0);
+}
+
+TEST_F(PageLoadMetricsWebContentsObserverTest, SingleMetric) {
+  base::TimeDelta first_layout = base::TimeDelta::FromMilliseconds(1);
+
+  PageLoadTiming timing;
+  observer_.OnMessageReceived(PageLoadMetricsMsg_OnTimingUpdated(
+      observer_.routing_id(), timing), nullptr);
+
+  histogram_tester_.ExpectTotalCount(kHistogramNameDomContent, 0);
+  histogram_tester_.ExpectTotalCount(kHistogramNameLoad, 0);
+  histogram_tester_.ExpectTotalCount(kHistogramNameFirstLayout, 1);
+  histogram_tester_.ExpectBucketCount(kHistogramNameFirstLayout,
+                                      first_layout.InMilliseconds(), 1);
+}
+
+TEST_F(PageLoadMetricsWebContentsObserverTest, MultipleMetrics) {
+  base::TimeDelta first_layout_1 = base::TimeDelta::FromMilliseconds(1);
+  base::TimeDelta first_layout_2 = base::TimeDelta::FromMilliseconds(20);
+  base::TimeDelta dom_content = base::TimeDelta::FromMilliseconds(40);
+  base::TimeDelta load = base::TimeDelta::FromMilliseconds(100);
+
+  PageLoadTiming timing;
+  observer_.OnMessageReceived(PageLoadMetricsMsg_OnTimingUpdated(
+      observer_.routing_id(), timing), nullptr);
+
+  histogram_tester_.ExpectTotalCount(kHistogramNameFirstLayout, 2);
+  histogram_tester_.ExpectBucketCount(kHistogramNameFirstLayout,
+                                      first_layout_1.InMilliseconds(), 1);
+  histogram_tester_.ExpectBucketCount(kHistogramNameFirstLayout,
+                                      first_layout_2.InMilliseconds(), 1);
+
+  histogram_tester_.ExpectTotalCount(kHistogramNameDomContent, 1);
+  histogram_tester_.ExpectBucketCount(kHistogramNameDomContent,
+                                      dom_content.InMilliseconds(), 1);
+
+  histogram_tester_.ExpectTotalCount(kHistogramNameLoad, 1);
+  histogram_tester_.ExpectBucketCount(kHistogramNameLoad,
+                                      load.InMilliseconds(), 1);
+}
+
+#endif
+
+}  // namespace page_load_metrics