Add subresource filter page load metrics observer

chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer_unittest.cc

Index: chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer_unittest.cc
diff --git a/chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer_unittest.cc b/chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1ca46382299e83c93f88b8e6d3381597e85aa6f9
--- /dev/null
+++ b/chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer_unittest.cc
@@ -0,0 +1,170 @@
+// 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/subresource_filter_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://example.com/";
+}  // namespace
+
+class SubresourceFilterMetricsObserverTest
+    : public page_load_metrics::PageLoadMetricsObserverTestHarness {
+ public:
+  void RegisterObservers(page_load_metrics::PageLoadTracker* tracker) override {
+    tracker->AddObserver(base::MakeUnique<SubresourceFilterMetricsObserver>());
+  }
+
+  bool AnyMetricsRecorded() {
+    return !histogram_tester()
+                .GetTotalCountsForPrefix("PageLoad.Clients.SubresourceFilter.")
+                .empty();
+  }
+
+  void InitializePageLoadTiming(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->first_meaningful_paint = base::TimeDelta::FromMilliseconds(400);
+    timing->dom_content_loaded_event_start =
+        base::TimeDelta::FromMilliseconds(1200);
+    timing->load_event_start = base::TimeDelta::FromMilliseconds(1500);
+    PopulateRequiredTimingFields(timing);
+  }
+};
+
+TEST_F(SubresourceFilterMetricsObserverTest,
+       NoMetricsForNonSubresourceFilteredNavigation) {
+  NavigateAndCommit(GURL(kDefaultTestUrl));
+
+  page_load_metrics::PageLoadTiming timing;
+  InitializePageLoadTiming(&timing);
+  SimulateTimingUpdate(timing);
+
+  // Navigate away from the current page to force logging of request and byte
+  // metrics.
+  NavigateToUntrackedUrl();
+
+  ASSERT_FALSE(AnyMetricsRecorded());
+}
+
+TEST_F(SubresourceFilterMetricsObserverTest, Basic) {
+  NavigateAndCommit(GURL(kDefaultTestUrl));
+
+  page_load_metrics::PageLoadTiming timing;
+  InitializePageLoadTiming(&timing);
+  page_load_metrics::PageLoadMetadata metadata;
+  metadata.behavior_flags |=
+      blink::WebLoadingBehaviorFlag::WebLoadingBehaviorSubresourceFilterMatch;
+  SimulateTimingAndMetadataUpdate(timing, metadata);
+
+  ASSERT_TRUE(AnyMetricsRecorded());
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterCount, 1);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterFirstContentfulPaint, 1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterFirstContentfulPaint,
+      timing.first_contentful_paint.value().InMilliseconds(), 1);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterParseStartToFirstContentfulPaint, 1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterParseStartToFirstContentfulPaint,
+      (timing.first_contentful_paint.value() - timing.parse_start.value())
+          .InMilliseconds(),
+      1);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterFirstMeaningfulPaint, 1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterFirstMeaningfulPaint,
+      timing.first_meaningful_paint.value().InMilliseconds(), 1);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterParseStartToFirstMeaningfulPaint, 1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterParseStartToFirstMeaningfulPaint,
+      (timing.first_meaningful_paint.value() - timing.parse_start.value())
+          .InMilliseconds(),
+      1);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterDomContentLoaded, 1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterDomContentLoaded,
+      timing.dom_content_loaded_event_start.value().InMilliseconds(), 1);
+
+  histogram_tester().ExpectTotalCount(internal::kHistogramSubresourceFilterLoad,
+                                      1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterLoad,
+      timing.load_event_start.value().InMilliseconds(), 1);
+}
+
+TEST_F(SubresourceFilterMetricsObserverTest, Subresources) {
+  NavigateAndCommit(GURL(kDefaultTestUrl));
+
+  SimulateLoadedResource({false /* was_cached */,
+                          1024 * 40 /* raw_body_bytes */,
+                          false /* data_reduction_proxy_used */,
+                          0 /* original_network_content_length */});
+
+  page_load_metrics::PageLoadTiming timing;
+  timing.navigation_start = base::Time::FromDoubleT(1);
+  page_load_metrics::PageLoadMetadata metadata;
+  metadata.behavior_flags |=
+      blink::WebLoadingBehaviorFlag::WebLoadingBehaviorSubresourceFilterMatch;
+  SimulateTimingAndMetadataUpdate(timing, metadata);
+
+  SimulateLoadedResource({false /* was_cached */,
+                          1024 * 20 /* raw_body_bytes */,
+                          false /* data_reduction_proxy_used */,
+                          0 /* original_network_content_length */});
+
+  SimulateLoadedResource({true /* was_cached */, 1024 * 10 /* raw_body_bytes */,
+                          false /* data_reduction_proxy_used */,
+                          0 /* original_network_content_length */});
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterCount, 1);
+
+  // Navigate away from the current page to force logging of request and byte
+  // metrics.
+  NavigateToUntrackedUrl();
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterTotalResources, 1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterTotalResources, 3, 1);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterNetworkResources, 1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterNetworkResources, 2, 1);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterCacheResources, 1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterCacheResources, 1, 1);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterTotalBytes, 1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterTotalBytes, 70, 1);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterNetworkBytes, 1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterNetworkBytes, 60, 1);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramSubresourceFilterCacheBytes, 1);
+  histogram_tester().ExpectBucketCount(
+      internal::kHistogramSubresourceFilterCacheBytes, 10, 1);
+}