79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
// Copyright 2018 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/metrics/persistent_histogram_storage.h"
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#include <memory>
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#include "base/files/file_path.h"
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#include "base/files/file_util.h"
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#include "base/files/scoped_temp_dir.h"
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#include "base/metrics/histogram_macros.h"
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#include "base/time/time.h"
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#include "build/build_config.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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namespace {
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// Name of the allocator for storing histograms.
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constexpr char kTestHistogramAllocatorName[] = "TestMetrics";
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} // namespace
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class PersistentHistogramStorageTest : public testing::Test {
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protected:
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PersistentHistogramStorageTest() = default;
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~PersistentHistogramStorageTest() override = default;
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// Creates a unique temporary directory, and sets the test storage directory.
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void SetUp() override {
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ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
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test_storage_dir_ =
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temp_dir_path().AppendASCII(kTestHistogramAllocatorName);
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}
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// Gets the path to the temporary directory.
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const FilePath& temp_dir_path() { return temp_dir_.GetPath(); }
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const FilePath& test_storage_dir() { return test_storage_dir_; }
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private:
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// A temporary directory where all file IO operations take place.
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ScopedTempDir temp_dir_;
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// The directory into which metrics files are written.
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FilePath test_storage_dir_;
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DISALLOW_COPY_AND_ASSIGN(PersistentHistogramStorageTest);
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};
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// TODO(chengx): Re-enable the test on OS_IOS after issue 836789 is fixed.
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// PersistentHistogramStorage is only used on OS_WIN now, so disabling this
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// test on OS_IOS is fine.
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#if !defined(OS_NACL) && !defined(OS_IOS)
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TEST_F(PersistentHistogramStorageTest, HistogramWriteTest) {
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auto persistent_histogram_storage =
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std::make_unique<PersistentHistogramStorage>(
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kTestHistogramAllocatorName,
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PersistentHistogramStorage::StorageDirManagement::kCreate);
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persistent_histogram_storage->set_storage_base_dir(temp_dir_path());
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// Log some random data.
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UMA_HISTOGRAM_BOOLEAN("Some.Test.Metric", true);
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// Deleting the object causes the data to be written to the disk.
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persistent_histogram_storage.reset();
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// The storage directory and the histogram file are created during the
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// destruction of the PersistentHistogramStorage instance.
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EXPECT_TRUE(DirectoryExists(test_storage_dir()));
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EXPECT_FALSE(IsDirectoryEmpty(test_storage_dir()));
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}
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#endif // !defined(OS_NACL) && !defined(OS_IOS)
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} // namespace base
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