1 // Copyright 2014 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "components/metrics/library_support/histogram_manager.h"
6
7 #include <stdint.h>
8
9 #include <string>
10
11 #include "base/metrics/histogram_macros.h"
12 #include "testing/gtest/include/gtest/gtest.h"
13
14 namespace metrics {
15
TEST(HistogramManager,HistogramBucketFields)16 TEST(HistogramManager, HistogramBucketFields) {
17 // Capture histograms at the start of the test to avoid later GetDeltas()
18 // calls picking them up.
19 std::vector<uint8_t> data_init;
20 HistogramManager::GetInstance()->GetDeltas(&data_init);
21
22 // kNoFlags filter should record all histograms.
23 UMA_HISTOGRAM_ENUMERATION("UmaHistogramManager", 1, 2);
24
25 std::vector<uint8_t> data;
26 EXPECT_TRUE(HistogramManager::GetInstance()->GetDeltas(&data));
27 EXPECT_FALSE(data.empty());
28 ChromeUserMetricsExtension uma_proto;
29 EXPECT_TRUE(uma_proto.ParseFromArray(reinterpret_cast<const char*>(&data[0]),
30 data.size()));
31 EXPECT_FALSE(data.empty());
32
33 const HistogramEventProto& histogram_proto =
34 uma_proto.histogram_event(uma_proto.histogram_event_size() - 1);
35 ASSERT_EQ(1, histogram_proto.bucket_size());
36 EXPECT_LE(0, histogram_proto.bucket(0).min());
37 EXPECT_LE(2, histogram_proto.bucket(0).max());
38 EXPECT_EQ(1, histogram_proto.bucket(0).count());
39
40 UMA_HISTOGRAM_ENUMERATION("UmaHistogramManager2", 2, 3);
41 std::vector<uint8_t> data2;
42 EXPECT_TRUE(HistogramManager::GetInstance()->GetDeltas(&data2));
43 EXPECT_FALSE(data2.empty());
44 ChromeUserMetricsExtension uma_proto2;
45 EXPECT_TRUE(uma_proto2.ParseFromArray(
46 reinterpret_cast<const char*>(&data2[0]), data2.size()));
47 EXPECT_FALSE(data2.empty());
48
49 const HistogramEventProto& histogram_proto2 =
50 uma_proto2.histogram_event(uma_proto2.histogram_event_size() - 1);
51 ASSERT_EQ(1, histogram_proto2.bucket_size());
52 EXPECT_LE(0, histogram_proto2.bucket(0).min());
53 EXPECT_LE(3, histogram_proto2.bucket(0).max());
54 EXPECT_EQ(1, histogram_proto2.bucket(0).count());
55 }
56
57 } // namespace metrics
58