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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#ifdef ENABLE_METRICS_PREVIEW
# include <gtest/gtest.h>
# include <thread>
# include "opentelemetry/sdk/_metrics/aggregator/min_max_sum_count_aggregator.h"
using namespace opentelemetry::sdk::metrics;
namespace metrics_api = opentelemetry::metrics;
TEST(MinMaxSumCountAggregator, Update)
{
// This tests that the aggregator updates the maintained value correctly
// after a call to the update() function.
MinMaxSumCountAggregator<int> agg(metrics_api::InstrumentKind::Counter);
auto value_set = agg.get_values();
ASSERT_EQ(value_set[0], 0);
ASSERT_EQ(value_set[1], 0);
ASSERT_EQ(value_set[2], 0);
ASSERT_EQ(value_set[3], 0);
// 1 + 2 + 3 + ... + 10 = 55
for (int i = 1; i <= 10; ++i)
{
agg.update(i);
}
value_set = agg.get_values();
ASSERT_EQ(value_set[0], 1); // min
ASSERT_EQ(value_set[1], 10); // max
ASSERT_EQ(value_set[2], 55); // sum
ASSERT_EQ(value_set[3], 10); // count
}
TEST(MinMaxSumCountAggregator, FirstUpdate)
{
// This tests that the aggregator appropriately maintains the min and
// max values after a single update call.
MinMaxSumCountAggregator<int> agg(metrics_api::InstrumentKind::Counter);
agg.update(1);
auto value_set = agg.get_values();
ASSERT_EQ(value_set[0], 1); // min
ASSERT_EQ(value_set[1], 1); // max
ASSERT_EQ(value_set[2], 1); // sum
ASSERT_EQ(value_set[3], 1); // count
}
TEST(MinMaxSumCountAggregator, Checkpoint)
{
// This test verifies that the default checkpoint is set correctly
// and that the checkpoint values update correctly after a call
// to the checkpoint() function.
MinMaxSumCountAggregator<int> agg(metrics_api::InstrumentKind::Counter);
// Verify that the default checkpoint is set correctly.
auto checkpoint_set = agg.get_checkpoint();
ASSERT_EQ(checkpoint_set[0], 0); // min
ASSERT_EQ(checkpoint_set[1], 0); // max
ASSERT_EQ(checkpoint_set[2], 0); // sum
ASSERT_EQ(checkpoint_set[3], 0); // count
// 1 + 2 + 3 + ... + 10 = 55
for (int i = 1; i <= 10; ++i)
{
agg.update(i);
}
agg.checkpoint();
// Verify that the checkpoint values were updated.
checkpoint_set = agg.get_checkpoint();
ASSERT_EQ(checkpoint_set[0], 1); // min
ASSERT_EQ(checkpoint_set[1], 10); // max
ASSERT_EQ(checkpoint_set[2], 55); // sum
ASSERT_EQ(checkpoint_set[3], 10); // count
// Verify that the current values were reset to the default state.
auto value_set = agg.get_values();
ASSERT_EQ(value_set[0], 0); // min
ASSERT_EQ(value_set[1], 0); // max
ASSERT_EQ(value_set[2], 0); // sum
ASSERT_EQ(value_set[3], 0); // count
}
TEST(MinMaxSumCountAggregator, Merge)
{
// This tests that the values_ vector is updated correctly after
// two aggregators are merged together.
MinMaxSumCountAggregator<int> agg1(metrics_api::InstrumentKind::Counter);
MinMaxSumCountAggregator<int> agg2(metrics_api::InstrumentKind::Counter);
// 1 + 2 + 3 + ... + 10 = 55
for (int i = 1; i <= 10; ++i)
{
agg1.update(i);
}
// 1 + 2 + 3 + ... + 20 = 210
for (int i = 1; i <= 20; ++i)
{
agg2.update(i);
}
agg1.merge(agg2);
// Verify that the current values were changed by the merge.
auto value_set = agg1.get_values();
ASSERT_EQ(value_set[0], 1); // min
ASSERT_EQ(value_set[1], 20); // max
ASSERT_EQ(value_set[2], 265); // sum
ASSERT_EQ(value_set[3], 30); // count
}
TEST(MinMaxSumCountAggregator, BadMerge)
{
// This verifies that we encounter and error when we try to merge
// two aggregators of different numeric types together.
MinMaxSumCountAggregator<int> agg1(metrics_api::InstrumentKind::Counter);
MinMaxSumCountAggregator<int> agg2(metrics_api::InstrumentKind::ValueRecorder);
agg1.update(1);
agg2.update(2);
agg1.merge(agg2);
// Verify that the values did NOT merge
auto value_set = agg1.get_values();
ASSERT_EQ(value_set[0], 1); // min
ASSERT_EQ(value_set[0], 1); // max
ASSERT_EQ(value_set[0], 1); // sum
ASSERT_EQ(value_set[0], 1); // count
}
TEST(MinMaxSumCountAggregator, Types)
{
// This test verifies that we do not encounter any errors when
// using various numeric types.
MinMaxSumCountAggregator<int> agg_int(metrics_api::InstrumentKind::Counter);
MinMaxSumCountAggregator<long> agg_long(metrics_api::InstrumentKind::Counter);
MinMaxSumCountAggregator<float> agg_float(metrics_api::InstrumentKind::Counter);
MinMaxSumCountAggregator<double> agg_double(metrics_api::InstrumentKind::Counter);
for (int i = 1; i <= 10; ++i)
{
agg_int.update(i);
agg_long.update(i);
}
for (float i = 1.0; i <= 10.0; i += 1)
{
agg_float.update(i);
agg_double.update(i);
}
auto value_set = agg_int.get_values();
ASSERT_EQ(value_set[0], 1); // min
ASSERT_EQ(value_set[1], 10); // max
ASSERT_EQ(value_set[2], 55); // sum
ASSERT_EQ(value_set[3], 10); // count
auto value_set2 = agg_long.get_values();
ASSERT_EQ(value_set[0], 1); // min
ASSERT_EQ(value_set[1], 10); // max
ASSERT_EQ(value_set[2], 55); // sum
ASSERT_EQ(value_set[3], 10); // count
auto value_set3 = agg_float.get_values();
ASSERT_EQ(value_set[0], 1.0); // min
ASSERT_EQ(value_set[1], 10.0); // max
ASSERT_EQ(value_set[2], 55.0); // sum
ASSERT_EQ(value_set[3], 10); // count
auto value_set4 = agg_double.get_values();
ASSERT_EQ(value_set[0], 1.0); // min
ASSERT_EQ(value_set[1], 10.0); // max
ASSERT_EQ(value_set[2], 55.0); // sum
ASSERT_EQ(value_set[3], 10); // count
}
static void callback(MinMaxSumCountAggregator<int> &agg)
{
// 1 + 2 + ... + 10000 = 50005000
for (int i = 1; i <= 10000; ++i)
{
agg.update(i);
}
}
TEST(MinMaxSumCountAggregator, Concurrency)
{
// This test checks that the aggregator updates appropriately
// when called in a multi-threaded context.
MinMaxSumCountAggregator<int> agg(metrics_api::InstrumentKind::Counter);
std::thread first(&callback, std::ref(agg));
std::thread second(&callback, std::ref(agg));
first.join();
second.join();
auto value_set = agg.get_values();
ASSERT_EQ(value_set[0], 1);
ASSERT_EQ(value_set[1], 10000);
ASSERT_EQ(value_set[2], 2 * 50005000);
ASSERT_EQ(value_set[3], 2 * 10000);
}
#endif
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