1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
// Copyright 2021 The Chromium Authors
// 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/integration_tests/metric_integration_test.h"
#include "chrome/test/base/ui_test_utils.h"
#include "content/public/browser/back_forward_cache.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "services/metrics/public/cpp/ukm_builders.h"
using ukm::builders::PageLoad;
IN_PROC_BROWSER_TEST_F(MetricIntegrationTest, UserTiming) {
LoadHTML(R"HTML(
<p>Sample website</p>
<script>
function runtest() {
let results = [];
for (let name of ['fully_loaded', 'fully_visible', 'interactive']) {
const m = performance.mark('mark_' + name);
results.push(m.startTime);
}
return results;
}
</script>
)HTML");
// Ensure that the previous page won't be stored in the back/forward cache, so
// that the histogram will be recorded when the previous page is unloaded.
web_contents()->GetController().GetBackForwardCache().DisableForTesting(
content::BackForwardCache::TEST_REQUIRES_NO_CACHING);
// Check web perf API.
const base::Value::List eval_result =
EvalJs(web_contents(), "runtest()").ExtractList();
const double fully_loaded = eval_result[0].GetDouble();
EXPECT_GT(fully_loaded, 0.0);
const double fully_visible = eval_result[1].GetDouble();
EXPECT_GT(fully_visible, 0.0);
const double interactive = eval_result[2].GetDouble();
EXPECT_GT(interactive, 0.0);
ASSERT_TRUE(ui_test_utils::NavigateToURL(browser(), GURL("about:blank")));
// Check UKM. We compare the webexposed value to the UKM value. The webexposed
// value will be rounded whereas the UKM value will not, so it may be off by 1
// given that the comparison is at 1ms granularity. Since expected_time is a
// double and the UKM values are int, we need leeway slightly more than 1. For
// instance expected_value could be 2.0004 and the reported value could be 1.
// So we use an epsilon of 1.3 to capture these cases.
ExpectUKMPageLoadMetricNear(
PageLoad::kPageTiming_UserTimingMarkFullyLoadedName, fully_loaded, 1.3);
ExpectUKMPageLoadMetricNear(
PageLoad::kPageTiming_UserTimingMarkFullyVisibleName, fully_visible, 1.3);
ExpectUKMPageLoadMetricNear(
PageLoad::kPageTiming_UserTimingMarkInteractiveName, interactive, 1.3);
}
|
