1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "chrome/common/metrics/metrics_log_base.h"
9 #include "base/base64.h"
10 #include "base/metrics/bucket_ranges.h"
11 #include "base/metrics/sample_vector.h"
12 #include "chrome/common/metrics/proto/chrome_user_metrics_extension.pb.h"
13 #include "testing/gtest/include/gtest/gtest.h"
17 class TestMetricsLogBase : public MetricsLogBase {
19 TestMetricsLogBase() : MetricsLogBase("client_id", 1, "1.2.3.4") {}
20 virtual ~TestMetricsLogBase() {}
22 using MetricsLogBase::uma_proto;
25 DISALLOW_COPY_AND_ASSIGN(TestMetricsLogBase);
30 TEST(MetricsLogBaseTest, EmptyRecord) {
31 MetricsLogBase log("totally bogus client ID", 137, "bogus version");
32 log.set_hardware_class("sample-class");
36 log.GetEncodedLog(&encoded);
38 // A couple of fields are hard to mock, so these will be copied over directly
39 // for the expected output.
40 metrics::ChromeUserMetricsExtension parsed;
41 ASSERT_TRUE(parsed.ParseFromString(encoded));
43 metrics::ChromeUserMetricsExtension expected;
44 expected.set_client_id(5217101509553811875); // Hashed bogus client ID
45 expected.set_session_id(137);
46 expected.mutable_system_profile()->set_build_timestamp(
47 parsed.system_profile().build_timestamp());
48 expected.mutable_system_profile()->set_app_version("bogus version");
49 expected.mutable_system_profile()->set_channel(
50 parsed.system_profile().channel());
51 expected.mutable_system_profile()->mutable_hardware()->set_hardware_class(
54 EXPECT_EQ(expected.SerializeAsString(), encoded);
57 TEST(MetricsLogBaseTest, HistogramBucketFields) {
58 // Create buckets: 1-5, 5-7, 7-8, 8-9, 9-10, 10-11, 11-12.
59 base::BucketRanges ranges(8);
60 ranges.set_range(0, 1);
61 ranges.set_range(1, 5);
62 ranges.set_range(2, 7);
63 ranges.set_range(3, 8);
64 ranges.set_range(4, 9);
65 ranges.set_range(5, 10);
66 ranges.set_range(6, 11);
67 ranges.set_range(7, 12);
69 base::SampleVector samples(&ranges);
70 samples.Accumulate(3, 1); // Bucket 1-5.
71 samples.Accumulate(6, 1); // Bucket 5-7.
72 samples.Accumulate(8, 1); // Bucket 8-9. (7-8 skipped)
73 samples.Accumulate(10, 1); // Bucket 10-11. (9-10 skipped)
74 samples.Accumulate(11, 1); // Bucket 11-12.
76 TestMetricsLogBase log;
77 log.RecordHistogramDelta("Test", samples);
79 const metrics::ChromeUserMetricsExtension* uma_proto = log.uma_proto();
80 const metrics::HistogramEventProto& histogram_proto =
81 uma_proto->histogram_event(uma_proto->histogram_event_size() - 1);
83 // Buckets with samples: 1-5, 5-7, 8-9, 10-11, 11-12.
84 // Should become: 1-/, 5-7, /-9, 10-/, /-12.
85 ASSERT_EQ(5, histogram_proto.bucket_size());
87 // 1-5 becomes 1-/ (max is same as next min).
88 EXPECT_TRUE(histogram_proto.bucket(0).has_min());
89 EXPECT_FALSE(histogram_proto.bucket(0).has_max());
90 EXPECT_EQ(1, histogram_proto.bucket(0).min());
92 // 5-7 stays 5-7 (no optimization possible).
93 EXPECT_TRUE(histogram_proto.bucket(1).has_min());
94 EXPECT_TRUE(histogram_proto.bucket(1).has_max());
95 EXPECT_EQ(5, histogram_proto.bucket(1).min());
96 EXPECT_EQ(7, histogram_proto.bucket(1).max());
98 // 8-9 becomes /-9 (min is same as max - 1).
99 EXPECT_FALSE(histogram_proto.bucket(2).has_min());
100 EXPECT_TRUE(histogram_proto.bucket(2).has_max());
101 EXPECT_EQ(9, histogram_proto.bucket(2).max());
103 // 10-11 becomes 10-/ (both optimizations apply, omit max is prioritized).
104 EXPECT_TRUE(histogram_proto.bucket(3).has_min());
105 EXPECT_FALSE(histogram_proto.bucket(3).has_max());
106 EXPECT_EQ(10, histogram_proto.bucket(3).min());
108 // 11-12 becomes /-12 (last record must keep max, min is same as max - 1).
109 EXPECT_FALSE(histogram_proto.bucket(4).has_min());
110 EXPECT_TRUE(histogram_proto.bucket(4).has_max());
111 EXPECT_EQ(12, histogram_proto.bucket(4).max());