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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <gtest/gtest.h>
#include <cstdint>
#include <limits>
#include <string>
#include "opentelemetry/sdk/metrics/data/circular_buffer.h"
using namespace opentelemetry::sdk::metrics;
class AdaptingIntegerArrayTest : public testing::TestWithParam<uint64_t>
{};
INSTANTIATE_TEST_SUITE_P(InterestingValues,
AdaptingIntegerArrayTest,
testing::Values<uint64_t>(1,
std::numeric_limits<uint8_t>::max() + 1ull,
std::numeric_limits<uint16_t>::max() + 1ull,
std::numeric_limits<uint32_t>::max() + 1ull));
TEST_P(AdaptingIntegerArrayTest, PreservesSizeOnEnlargement)
{
AdaptingIntegerArray counter(10);
EXPECT_EQ(counter.Size(), 10);
counter.Increment(0, GetParam());
EXPECT_EQ(counter.Size(), 10);
}
TEST_P(AdaptingIntegerArrayTest, IncrementAndGet)
{
AdaptingIntegerArray counter(10);
for (int idx = 0; idx < 10; idx += 1)
{
EXPECT_EQ(counter.Get(idx), 0);
counter.Increment(idx, 1);
EXPECT_EQ(counter.Get(idx), 1);
counter.Increment(idx, GetParam());
EXPECT_EQ(counter.Get(idx), GetParam() + 1);
}
}
TEST_P(AdaptingIntegerArrayTest, Copy)
{
AdaptingIntegerArray counter(10);
counter.Increment(0, GetParam());
EXPECT_EQ(counter.Get(0), GetParam());
AdaptingIntegerArray copy = counter;
EXPECT_EQ(copy.Get(0), GetParam());
counter.Increment(0, 1);
EXPECT_EQ(counter.Get(0), GetParam() + 1);
EXPECT_EQ(copy.Get(0), GetParam());
}
TEST_P(AdaptingIntegerArrayTest, Clear)
{
AdaptingIntegerArray counter(10);
counter.Increment(0, GetParam());
EXPECT_EQ(counter.Get(0), GetParam());
counter.Clear();
counter.Increment(0, 1);
EXPECT_EQ(counter.Get(0), 1);
}
TEST(AdaptingCircularBufferCounterTest, ReturnsZeroOutsidePopulatedRange)
{
AdaptingCircularBufferCounter counter{10};
EXPECT_EQ(counter.Get(0), 0);
EXPECT_EQ(counter.Get(100), 0);
counter.Increment(2, 1);
counter.Increment(99, 1);
EXPECT_EQ(counter.Get(0), 0);
EXPECT_EQ(counter.Get(100), 0);
}
TEST(AdaptingCircularBufferCounterTest, ExpandLower)
{
AdaptingCircularBufferCounter counter{160};
EXPECT_TRUE(counter.Increment(10, 1));
// Add BEFORE the initial see (array index 0) and make sure we wrap around the datastructure.
EXPECT_TRUE(counter.Increment(0, 1));
EXPECT_EQ(counter.Get(10), 1);
EXPECT_EQ(counter.Get(0), 1);
EXPECT_EQ(counter.StartIndex(), 0);
EXPECT_EQ(counter.EndIndex(), 10);
// Add AFTER initial entry and just push back end.
EXPECT_TRUE(counter.Increment(20, 1));
EXPECT_EQ(counter.Get(20), 1);
EXPECT_EQ(counter.Get(10), 1);
EXPECT_EQ(counter.Get(0), 1);
EXPECT_EQ(counter.StartIndex(), 0);
EXPECT_EQ(counter.EndIndex(), 20);
}
TEST(AdaptingCircularBufferCounterTest, ShouldFailAtLimit)
{
AdaptingCircularBufferCounter counter{10};
EXPECT_TRUE(counter.Increment(10, 1));
EXPECT_TRUE(counter.Increment(15, 2));
EXPECT_TRUE(counter.Increment(6, 3));
// Check state
EXPECT_EQ(counter.StartIndex(), 6);
EXPECT_EQ(counter.EndIndex(), 15);
EXPECT_EQ(counter.Get(6), 3);
EXPECT_EQ(counter.Get(10), 1);
EXPECT_EQ(counter.Get(15), 2);
// Adding over the maximum # of buckets
EXPECT_FALSE(counter.Increment(5, 1));
EXPECT_FALSE(counter.Increment(16, 1));
}
TEST(AdaptingCircularBufferCounterTest, ShouldCopyCounters)
{
AdaptingCircularBufferCounter counter{2};
EXPECT_TRUE(counter.Increment(2, 1));
EXPECT_TRUE(counter.Increment(1, 1));
EXPECT_FALSE(counter.Increment(3, 1));
AdaptingCircularBufferCounter copy{counter};
EXPECT_EQ(counter.Get(2), 1);
EXPECT_EQ(copy.Get(2), 1);
EXPECT_EQ(copy.MaxSize(), counter.MaxSize());
EXPECT_EQ(copy.StartIndex(), counter.StartIndex());
EXPECT_EQ(copy.EndIndex(), counter.EndIndex());
// Mutate copy and make sure original is unchanged.
EXPECT_TRUE(copy.Increment(2, 1));
EXPECT_EQ(copy.Get(2), 2);
EXPECT_EQ(counter.Get(2), 1);
}
TEST(AdaptingCircularBufferCounterTest, Clear)
{
AdaptingCircularBufferCounter counter{10};
EXPECT_TRUE(counter.Empty());
EXPECT_TRUE(counter.Increment(2, 1));
EXPECT_FALSE(counter.Empty());
EXPECT_TRUE(counter.Increment(8, 1));
// Check state.
EXPECT_EQ(counter.StartIndex(), 2);
EXPECT_EQ(counter.EndIndex(), 8);
EXPECT_EQ(counter.Get(2), 1);
EXPECT_EQ(counter.Get(8), 1);
// Clear and verify.
EXPECT_FALSE(counter.Empty());
counter.Clear();
EXPECT_TRUE(counter.Empty());
}
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