79 lines
1.8 KiB
C++
79 lines
1.8 KiB
C++
// Copyright 2012 The Chromium Authors
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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/bucket_ranges.h"
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#include <stdint.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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TEST(BucketRangesTest, NormalSetup) {
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BucketRanges ranges(5);
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ASSERT_EQ(5u, ranges.size());
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ASSERT_EQ(4u, ranges.bucket_count());
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for (int i = 0; i < 5; ++i) {
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EXPECT_EQ(0, ranges.range(i));
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}
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EXPECT_EQ(0u, ranges.checksum());
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ranges.set_range(3, 100);
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EXPECT_EQ(100, ranges.range(3));
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}
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TEST(BucketRangesTest, Equals) {
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// Compare empty ranges.
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BucketRanges ranges1(3);
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BucketRanges ranges2(3);
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BucketRanges ranges3(5);
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EXPECT_TRUE(ranges1.Equals(&ranges2));
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EXPECT_FALSE(ranges1.Equals(&ranges3));
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EXPECT_FALSE(ranges2.Equals(&ranges3));
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// Compare full filled ranges.
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ranges1.set_range(0, 0);
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ranges1.set_range(1, 1);
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ranges1.set_range(2, 2);
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ranges1.set_checksum(100);
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ranges2.set_range(0, 0);
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ranges2.set_range(1, 1);
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ranges2.set_range(2, 2);
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ranges2.set_checksum(100);
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EXPECT_TRUE(ranges1.Equals(&ranges2));
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// Checksum does not match.
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ranges1.set_checksum(99);
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EXPECT_FALSE(ranges1.Equals(&ranges2));
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ranges1.set_checksum(100);
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// Range does not match.
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ranges1.set_range(1, 3);
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EXPECT_FALSE(ranges1.Equals(&ranges2));
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}
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TEST(BucketRangesTest, Checksum) {
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BucketRanges ranges(3);
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ranges.set_range(0, 0);
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ranges.set_range(1, 1);
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ranges.set_range(2, 2);
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ranges.ResetChecksum();
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EXPECT_EQ(289217253u, ranges.checksum());
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ranges.set_range(2, 3);
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EXPECT_FALSE(ranges.HasValidChecksum());
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ranges.ResetChecksum();
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EXPECT_EQ(2843835776u, ranges.checksum());
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EXPECT_TRUE(ranges.HasValidChecksum());
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}
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} // namespace
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} // namespace base
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