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// 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 "chrome/common/metrics/metrics_log_base.h"
#include <string>
#include "base/base64.h"
#include "base/format_macros.h"
#include "base/metrics/bucket_ranges.h"
#include "base/metrics/sample_vector.h"
#include "base/strings/stringprintf.h"
#include "chrome/common/metrics/proto/chrome_user_metrics_extension.pb.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
class TestMetricsLogBase : public MetricsLogBase {
public:
TestMetricsLogBase() : MetricsLogBase("client_id", 1, "1.2.3.4") {}
virtual ~TestMetricsLogBase() {}
using MetricsLogBase::uma_proto;
private:
DISALLOW_COPY_AND_ASSIGN(TestMetricsLogBase);
};
} // namespace
TEST(MetricsLogBaseTest, EmptyRecord) {
MetricsLogBase log("totally bogus client ID", 137, "bogus version");
log.set_hardware_class("sample-class");
log.CloseLog();
std::string encoded;
log.GetEncodedLog(&encoded);
// A couple of fields are hard to mock, so these will be copied over directly
// for the expected output.
metrics::ChromeUserMetricsExtension parsed;
ASSERT_TRUE(parsed.ParseFromString(encoded));
metrics::ChromeUserMetricsExtension expected;
expected.set_client_id(5217101509553811875); // Hashed bogus client ID
expected.set_session_id(137);
expected.mutable_system_profile()->set_build_timestamp(
parsed.system_profile().build_timestamp());
expected.mutable_system_profile()->set_app_version("bogus version");
expected.mutable_system_profile()->set_channel(
parsed.system_profile().channel());
expected.mutable_system_profile()->mutable_hardware()->set_hardware_class(
"sample-class");
EXPECT_EQ(expected.SerializeAsString(), encoded);
}
// Make sure our ID hashes are the same as what we see on the server side.
TEST(MetricsLogBaseTest, Hashes) {
static const struct {
std::string input;
std::string output;
} cases[] = {
{"Back", "0x0557fa923dcee4d0"},
{"Forward", "0x67d2f6740a8eaebf"},
{"NewTab", "0x290eb683f96572f1"},
};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); ++i) {
uint64 hash = MetricsLogBase::Hash(cases[i].input);
std::string hash_hex = base::StringPrintf("0x%016" PRIx64, hash);
EXPECT_EQ(cases[i].output, hash_hex);
}
}
TEST(MetricsLogBaseTest, HistogramBucketFields) {
// Create buckets: 1-5, 5-7, 7-8, 8-9, 9-10, 10-11, 11-12.
base::BucketRanges ranges(8);
ranges.set_range(0, 1);
ranges.set_range(1, 5);
ranges.set_range(2, 7);
ranges.set_range(3, 8);
ranges.set_range(4, 9);
ranges.set_range(5, 10);
ranges.set_range(6, 11);
ranges.set_range(7, 12);
base::SampleVector samples(&ranges);
samples.Accumulate(3, 1); // Bucket 1-5.
samples.Accumulate(6, 1); // Bucket 5-7.
samples.Accumulate(8, 1); // Bucket 8-9. (7-8 skipped)
samples.Accumulate(10, 1); // Bucket 10-11. (9-10 skipped)
samples.Accumulate(11, 1); // Bucket 11-12.
TestMetricsLogBase log;
log.RecordHistogramDelta("Test", samples);
const metrics::ChromeUserMetricsExtension* uma_proto = log.uma_proto();
const metrics::HistogramEventProto& histogram_proto =
uma_proto->histogram_event(uma_proto->histogram_event_size() - 1);
// Buckets with samples: 1-5, 5-7, 8-9, 10-11, 11-12.
// Should become: 1-/, 5-7, /-9, 10-/, /-12.
ASSERT_EQ(5, histogram_proto.bucket_size());
// 1-5 becomes 1-/ (max is same as next min).
EXPECT_TRUE(histogram_proto.bucket(0).has_min());
EXPECT_FALSE(histogram_proto.bucket(0).has_max());
EXPECT_EQ(1, histogram_proto.bucket(0).min());
// 5-7 stays 5-7 (no optimization possible).
EXPECT_TRUE(histogram_proto.bucket(1).has_min());
EXPECT_TRUE(histogram_proto.bucket(1).has_max());
EXPECT_EQ(5, histogram_proto.bucket(1).min());
EXPECT_EQ(7, histogram_proto.bucket(1).max());
// 8-9 becomes /-9 (min is same as max - 1).
EXPECT_FALSE(histogram_proto.bucket(2).has_min());
EXPECT_TRUE(histogram_proto.bucket(2).has_max());
EXPECT_EQ(9, histogram_proto.bucket(2).max());
// 10-11 becomes 10-/ (both optimizations apply, omit max is prioritized).
EXPECT_TRUE(histogram_proto.bucket(3).has_min());
EXPECT_FALSE(histogram_proto.bucket(3).has_max());
EXPECT_EQ(10, histogram_proto.bucket(3).min());
// 11-12 becomes /-12 (last record must keep max, min is same as max - 1).
EXPECT_FALSE(histogram_proto.bucket(4).has_min());
EXPECT_TRUE(histogram_proto.bucket(4).has_max());
EXPECT_EQ(12, histogram_proto.bucket(4).max());
}
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