| // Copyright 2018 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/stale_while_revalidate_page_load_metrics_observer.h" |
| |
| #include <memory> |
| |
| #include "chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h" |
| #include "chrome/browser/page_load_metrics/page_load_tracker.h" |
| #include "chrome/common/page_load_metrics/test/page_load_metrics_test_util.h" |
| #include "chrome/test/base/testing_browser_process.h" |
| #include "services/metrics/public/cpp/ukm_builders.h" |
| #include "third_party/blink/public/platform/web_loading_behavior_flag.h" |
| |
| class StaleWhileRevalidatePageLoadMetricsObserverTest |
| : public page_load_metrics::PageLoadMetricsObserverTestHarness { |
| protected: |
| void RegisterObservers(page_load_metrics::PageLoadTracker* tracker) override { |
| tracker->AddObserver( |
| std::make_unique<StaleWhileRevalidatePageLoadMetricsObserver>()); |
| } |
| }; |
| |
| TEST_F(StaleWhileRevalidatePageLoadMetricsObserverTest, TestHistograms) { |
| struct TestCase { |
| blink::WebLoadingBehaviorFlag flag; |
| const char* fcp_histogram; |
| const char* parse_to_fcp_histogram; |
| }; |
| |
| TestCase test_cases[] = { |
| {blink::WebLoadingBehaviorFlag:: |
| kStaleWhileRevalidateResourceCandidateNetworkLoad, |
| internal::kHistogramSWRFirstContentfulPaintNetwork, |
| internal::kHistogramSWRParseToFirstContentfulPaintNetwork}, |
| {blink::WebLoadingBehaviorFlag:: |
| kStaleWhileRevalidateResourceCandidateStaleCacheLoad, |
| internal::kHistogramSWRFirstContentfulPaintStaleCache, |
| internal::kHistogramSWRParseToFirstContentfulPaintStaleCache}, |
| {blink::WebLoadingBehaviorFlag:: |
| kStaleWhileRevalidateResourceCandidateCacheLoad, |
| internal::kHistogramSWRFirstContentfulPaintCache, |
| internal::kHistogramSWRParseToFirstContentfulPaintCache}}; |
| for (const auto test_case : test_cases) { |
| base::TimeDelta parse_start = base::TimeDelta::FromMilliseconds(1); |
| base::TimeDelta contentful_paint = base::TimeDelta::FromMilliseconds(3); |
| page_load_metrics::mojom::PageLoadTiming timing; |
| page_load_metrics::InitPageLoadTimingForTest(&timing); |
| timing.navigation_start = base::Time::FromDoubleT(1); |
| timing.parse_timing->parse_start = parse_start; |
| timing.paint_timing->first_contentful_paint = contentful_paint; |
| PopulateRequiredTimingFields(&timing); |
| |
| page_load_metrics::mojom::PageLoadMetadata metadata; |
| metadata.behavior_flags |= test_case.flag; |
| NavigateAndCommit(GURL("https://www.google.com/")); |
| SimulateTimingAndMetadataUpdate(timing, metadata); |
| |
| histogram_tester().ExpectTotalCount(test_case.fcp_histogram, 1); |
| histogram_tester().ExpectBucketCount(test_case.fcp_histogram, |
| contentful_paint.InMilliseconds(), 1); |
| histogram_tester().ExpectTotalCount(test_case.parse_to_fcp_histogram, 1); |
| histogram_tester().ExpectBucketCount( |
| test_case.parse_to_fcp_histogram, |
| contentful_paint.InMilliseconds() - parse_start.InMilliseconds(), 1); |
| } |
| } |