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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
// Copyright (c) 2012 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 <map>
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram.h"
#include "base/metrics/statistics_recorder.h"
#include "base/metrics/user_metrics.h"
#include "chrome/browser/extensions/extension_apitest.h"
#include "components/variations/variations_associated_data.h"
namespace {
// The tests that are run by this extension are expected to record the following
// user actions, with the specified counts. If the tests in test.js are
// modified, this array may need to be updated.
struct RecordedUserAction {
const char* name;
int count; // number of times the metric was recorded.
} g_user_actions[] = {
{"test.ua.1", 1},
{"test.ua.2", 2},
};
// The tests that are run by this extension are expected to record the following
// histograms. If the tests in test.js are modified, this array may need to be
// updated.
struct RecordedHistogram {
const char* name;
base::HistogramType type;
int min;
int max;
size_t buckets;
int count;
} g_histograms[] = {
{"test.h.1", base::HISTOGRAM, 1, 100, 50, 1}, // custom
{"test.h.2", base::LINEAR_HISTOGRAM, 1, 200, 50, 1}, // custom
{"test.h.3", base::LINEAR_HISTOGRAM, 1, 101, 102, 2}, // percentage
{"test.sparse.1", base::SPARSE_HISTOGRAM, 0, 0, 0, 1},
{"test.sparse.2", base::SPARSE_HISTOGRAM, 0, 0, 0, 2},
{"test.sparse.3", base::SPARSE_HISTOGRAM, 0, 0, 0, 6},
{"test.time", base::HISTOGRAM, 1, 10000, 50, 1},
{"test.medium.time", base::HISTOGRAM, 1, 180000, 50, 1},
{"test.long.time", base::HISTOGRAM, 1, 3600000, 50, 1},
{"test.count", base::HISTOGRAM, 1, 1000000, 50, 1},
{"test.medium.count", base::HISTOGRAM, 1, 10000, 50, 1},
{"test.small.count", base::HISTOGRAM, 1, 100, 50, 1},
{"test.bucketchange.linear", base::LINEAR_HISTOGRAM, 1, 100, 10, 2},
{"test.bucketchange.log", base::HISTOGRAM, 1, 100, 10, 2}, };
// Represents a bucket in a sparse histogram.
struct Bucket {
int histogram_value;
int count;
};
// We expect the following sparse histograms.
struct SparseHistogram {
const char* name;
int bucket_count;
Bucket buckets[10];
} g_sparse_histograms[] = {
{"test.sparse.1", 1, {{42, 1}}},
{"test.sparse.2", 1, {{24, 2}}},
{"test.sparse.3", 3, {{1, 1}, {2, 2}, {3, 3}}}};
// This class observes and collects user action notifications that are sent
// by the tests, so that they can be examined afterwards for correctness.
class UserActionObserver {
public:
UserActionObserver();
~UserActionObserver();
void ValidateUserActions(const RecordedUserAction* recorded, int count);
private:
typedef std::map<std::string, int> UserActionCountMap;
void OnUserAction(const std::string& action);
int num_metrics() const {
return count_map_.size();
}
int GetMetricCount(const std::string& name) const {
UserActionCountMap::const_iterator i = count_map_.find(name);
return i == count_map_.end() ? -1 : i->second;
}
UserActionCountMap count_map_;
base::ActionCallback action_callback_;
DISALLOW_COPY_AND_ASSIGN(UserActionObserver);
};
UserActionObserver::UserActionObserver()
: action_callback_(base::Bind(&UserActionObserver::OnUserAction,
base::Unretained(this))) {
base::AddActionCallback(action_callback_);
}
UserActionObserver::~UserActionObserver() {
base::RemoveActionCallback(action_callback_);
}
void UserActionObserver::OnUserAction(const std::string& action) {
++(count_map_[action]);
}
void UserActionObserver::ValidateUserActions(const RecordedUserAction* recorded,
int count) {
for (int i = 0; i < count; ++i) {
const RecordedUserAction& ua = recorded[i];
EXPECT_EQ(ua.count, GetMetricCount(ua.name));
}
}
void ValidateSparseHistogramSamples(
const std::string& name,
const base::HistogramSamples& samples) {
for (unsigned int i = 0; i < arraysize(g_sparse_histograms); ++i) {
const SparseHistogram& sparse_histogram = g_sparse_histograms[i];
if (std::string(name) == sparse_histogram.name) {
for (int j = 0; j < sparse_histogram.bucket_count; ++j) {
const Bucket& bucket = sparse_histogram.buckets[j];
EXPECT_EQ(bucket.count, samples.GetCount(bucket.histogram_value));
}
}
}
}
void ValidateHistograms(const RecordedHistogram* recorded,
int count) {
base::StatisticsRecorder::Histograms histograms;
base::StatisticsRecorder::GetHistograms(&histograms);
// Code other than the tests tun here will record some histogram values, but
// we will ignore those. This function validates that all the histogram we
// expect to see are present in the list, and that their basic info is
// correct.
for (int i = 0; i < count; ++i) {
const RecordedHistogram& r = recorded[i];
size_t j = 0;
for (j = 0; j < histograms.size(); ++j) {
base::HistogramBase* histogram(histograms[j]);
if (r.name == histogram->histogram_name()) {
scoped_ptr<base::HistogramSamples> snapshot =
histogram->SnapshotSamples();
base::HistogramBase::Count sample_count = snapshot->TotalCount();
EXPECT_EQ(r.count, sample_count);
EXPECT_EQ(r.type, histogram->GetHistogramType());
if (r.type == base::SPARSE_HISTOGRAM) {
ValidateSparseHistogramSamples(r.name, *snapshot);
} else {
EXPECT_TRUE(
histogram->HasConstructionArguments(r.min, r.max, r.buckets));
}
break;
}
}
EXPECT_LT(j, histograms.size());
}
}
} // anonymous namespace
IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Metrics) {
UserActionObserver observer;
base::FieldTrialList::CreateFieldTrial("apitestfieldtrial2", "group1");
std::map<std::string, std::string> params;
params["a"] = "aa";
params["b"] = "bb";
ASSERT_TRUE(variations::AssociateVariationParams(
"apitestfieldtrial2", "group1", params));
ASSERT_TRUE(RunComponentExtensionTest("metrics")) << message_;
observer.ValidateUserActions(g_user_actions, arraysize(g_user_actions));
ValidateHistograms(g_histograms, arraysize(g_histograms));
}
|
