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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <vector>
#include <base/at_exit.h>
#include <base/files/file_util.h>
#include <base/files/scoped_temp_dir.h>
#include <base/strings/string_number_conversions.h>
#include <brillo/flag_helper.h>
#include <gtest/gtest.h>
#include "constants.h"
#include "metrics_collector.h"
#include "metrics/metrics_library_mock.h"
#include "persistent_integer_mock.h"
using base::FilePath;
using base::TimeDelta;
using std::string;
using std::vector;
using ::testing::_;
using ::testing::AnyNumber;
using ::testing::AtLeast;
using ::testing::Return;
using ::testing::StrictMock;
using chromeos_metrics::PersistentIntegerMock;
class MetricsCollectorTest : public testing::Test {
protected:
virtual void SetUp() {
brillo::FlagHelper::Init(0, nullptr, "");
EXPECT_TRUE(temp_dir_.CreateUniqueTempDir());
base::FilePath private_dir = temp_dir_.path().Append("private");
base::FilePath shared_dir = temp_dir_.path().Append("shared");
EXPECT_TRUE(base::CreateDirectory(private_dir));
EXPECT_TRUE(base::CreateDirectory(shared_dir));
daemon_.Init(true, &metrics_lib_, "", private_dir, shared_dir);
}
// Adds a metrics library mock expectation that the specified metric
// will be generated.
void ExpectSample(const std::string& name, int sample) {
EXPECT_CALL(metrics_lib_, SendToUMA(name, sample, _, _, _))
.Times(1)
.WillOnce(Return(true))
.RetiresOnSaturation();
}
// Creates or overwrites the file in |path| so that it contains the printable
// representation of |value|.
void CreateUint64ValueFile(const base::FilePath& path, uint64_t value) {
std::string value_string = base::Uint64ToString(value);
ASSERT_EQ(value_string.length(),
base::WriteFile(path, value_string.c_str(),
value_string.length()));
}
// The MetricsCollector under test.
MetricsCollector daemon_;
// Temporary directory used for tests.
base::ScopedTempDir temp_dir_;
// Mocks. They are strict mock so that all unexpected
// calls are marked as failures.
StrictMock<MetricsLibraryMock> metrics_lib_;
};
TEST_F(MetricsCollectorTest, SendSample) {
ExpectSample("Dummy.Metric", 3);
daemon_.SendSample("Dummy.Metric", /* sample */ 3,
/* min */ 1, /* max */ 100, /* buckets */ 50);
}
TEST_F(MetricsCollectorTest, ProcessMeminfo) {
string meminfo =
"MemTotal: 2000000 kB\nMemFree: 500000 kB\n"
"Buffers: 1000000 kB\nCached: 213652 kB\n"
"SwapCached: 0 kB\nActive: 133400 kB\n"
"Inactive: 183396 kB\nActive(anon): 92984 kB\n"
"Inactive(anon): 58860 kB\nActive(file): 40416 kB\n"
"Inactive(file): 124536 kB\nUnevictable: 0 kB\n"
"Mlocked: 0 kB\nSwapTotal: 0 kB\n"
"SwapFree: 0 kB\nDirty: 40 kB\n"
"Writeback: 0 kB\nAnonPages: 92652 kB\n"
"Mapped: 59716 kB\nShmem: 59196 kB\n"
"Slab: 16656 kB\nSReclaimable: 6132 kB\n"
"SUnreclaim: 10524 kB\nKernelStack: 1648 kB\n"
"PageTables: 2780 kB\nNFS_Unstable: 0 kB\n"
"Bounce: 0 kB\nWritebackTmp: 0 kB\n"
"CommitLimit: 970656 kB\nCommitted_AS: 1260528 kB\n"
"VmallocTotal: 122880 kB\nVmallocUsed: 12144 kB\n"
"VmallocChunk: 103824 kB\nDirectMap4k: 9636 kB\n"
"DirectMap2M: 1955840 kB\n";
// All enum calls must report percents.
EXPECT_CALL(metrics_lib_, SendEnumToUMA(_, _, 100)).Times(AtLeast(1));
// Check that MemFree is correctly computed at 25%.
EXPECT_CALL(metrics_lib_, SendEnumToUMA("Platform.MeminfoMemFree", 25, 100))
.Times(AtLeast(1));
// Check that we call SendToUma at least once (log histogram).
EXPECT_CALL(metrics_lib_, SendToUMA(_, _, _, _, _))
.Times(AtLeast(1));
// Make sure we don't report fields not in the list.
EXPECT_CALL(metrics_lib_, SendToUMA("Platform.MeminfoMlocked", _, _, _, _))
.Times(0);
EXPECT_CALL(metrics_lib_, SendEnumToUMA("Platform.MeminfoMlocked", _, _))
.Times(0);
EXPECT_TRUE(daemon_.ProcessMeminfo(meminfo));
}
TEST_F(MetricsCollectorTest, ProcessMeminfo2) {
string meminfo = "MemTotal: 2000000 kB\nMemFree: 1000000 kB\n";
// Not enough fields.
EXPECT_FALSE(daemon_.ProcessMeminfo(meminfo));
}
TEST_F(MetricsCollectorTest, SendZramMetrics) {
EXPECT_TRUE(daemon_.testing_);
// |compr_data_size| is the size in bytes of compressed data.
const uint64_t compr_data_size = 50 * 1000 * 1000;
// The constant '3' is a realistic but random choice.
// |orig_data_size| does not include zero pages.
const uint64_t orig_data_size = compr_data_size * 3;
const uint64_t page_size = 4096;
const uint64_t zero_pages = 10 * 1000 * 1000 / page_size;
CreateUint64ValueFile(
temp_dir_.path().Append(MetricsCollector::kComprDataSizeName),
compr_data_size);
CreateUint64ValueFile(
temp_dir_.path().Append(MetricsCollector::kOrigDataSizeName),
orig_data_size);
CreateUint64ValueFile(
temp_dir_.path().Append(MetricsCollector::kZeroPagesName), zero_pages);
const uint64_t real_orig_size = orig_data_size + zero_pages * page_size;
const uint64_t zero_ratio_percent =
zero_pages * page_size * 100 / real_orig_size;
// Ratio samples are in percents.
const uint64_t actual_ratio_sample = real_orig_size * 100 / compr_data_size;
EXPECT_CALL(metrics_lib_, SendToUMA(_, compr_data_size >> 20, _, _, _));
EXPECT_CALL(metrics_lib_,
SendToUMA(_, (real_orig_size - compr_data_size) >> 20, _, _, _));
EXPECT_CALL(metrics_lib_, SendToUMA(_, actual_ratio_sample, _, _, _));
EXPECT_CALL(metrics_lib_, SendToUMA(_, zero_pages, _, _, _));
EXPECT_CALL(metrics_lib_, SendToUMA(_, zero_ratio_percent, _, _, _));
EXPECT_TRUE(daemon_.ReportZram(temp_dir_.path()));
}
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