opentelemetry-cpp/sdk/test/metrics/attributes_hashmap_test.cc

161 lines
5.2 KiB
C++

// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <gtest/gtest.h>
#include <stddef.h>
#include <stdint.h>
#include <functional>
#include <memory>
#include <string>
#include <utility>
#include "opentelemetry/nostd/function_ref.h"
#include "opentelemetry/nostd/string_view.h"
#include "opentelemetry/sdk/common/attributemap_hash.h"
#include "opentelemetry/sdk/metrics/aggregation/aggregation.h"
#include "opentelemetry/sdk/metrics/aggregation/drop_aggregation.h"
#include "opentelemetry/sdk/metrics/state/attributes_hashmap.h"
#include "opentelemetry/sdk/metrics/view/attributes_processor.h"
using namespace opentelemetry::sdk::metrics;
namespace nostd = opentelemetry::nostd;
TEST(AttributesHashMap, BasicTests)
{
// Empty map
AttributesHashMap hash_map;
EXPECT_EQ(hash_map.Size(), 0);
MetricAttributes m1 = {{"k1", "v1"}};
EXPECT_EQ(hash_map.Get(m1), nullptr);
EXPECT_EQ(hash_map.Has(m1), false);
// Set
std::unique_ptr<Aggregation> aggregation1(
new DropAggregation()); // = std::unique_ptr<Aggregation>(new DropAggregation);
hash_map.Set(m1, std::move(aggregation1));
hash_map.Get(m1)->Aggregate(static_cast<int64_t>(1));
EXPECT_EQ(hash_map.Size(), 1);
EXPECT_EQ(hash_map.Has(m1), true);
// Set same key again
auto aggregation2 = std::unique_ptr<Aggregation>(new DropAggregation());
hash_map.Set(m1, std::move(aggregation2));
hash_map.Get(m1)->Aggregate(static_cast<int64_t>(1));
EXPECT_EQ(hash_map.Size(), 1);
EXPECT_EQ(hash_map.Has(m1), true);
// Set more enteria
auto aggregation3 = std::unique_ptr<Aggregation>(new DropAggregation());
MetricAttributes m3 = {{"k1", "v1"}, {"k2", "v2"}};
hash_map.Set(m3, std::move(aggregation3));
EXPECT_EQ(hash_map.Has(m1), true);
EXPECT_EQ(hash_map.Has(m3), true);
hash_map.Get(m3)->Aggregate(static_cast<int64_t>(1));
EXPECT_EQ(hash_map.Size(), 2);
// GetOrSetDefault
std::function<std::unique_ptr<Aggregation>()> create_default_aggregation =
[]() -> std::unique_ptr<Aggregation> {
return std::unique_ptr<Aggregation>(new DropAggregation);
};
MetricAttributes m4 = {{"k1", "v1"}, {"k2", "v2"}, {"k3", "v3"}};
hash_map.GetOrSetDefault(m4, create_default_aggregation)->Aggregate(static_cast<int64_t>(1));
EXPECT_EQ(hash_map.Size(), 3);
// Set attributes with different order - shouldn't create a new entry.
MetricAttributes m5 = {{"k2", "v2"}, {"k1", "v1"}};
EXPECT_EQ(hash_map.Has(m5), true);
// Set attributes with different order - shouldn't create a new entry.
MetricAttributes m6 = {{"k1", "v2"}, {"k2", "v1"}};
EXPECT_EQ(hash_map.Has(m6), false);
// GetAllEnteries
size_t count = 0;
hash_map.GetAllEnteries(
[&count](const MetricAttributes & /* attributes */, Aggregation & /* aggregation */) {
count++;
return true;
});
EXPECT_EQ(count, hash_map.Size());
}
class MetricAttributeMapHashForCollision
{
public:
size_t operator()(const MetricAttributes & /*attributes*/) const { return 42; }
};
TEST(AttributesHashMap, CollisionTest)
{
// The hash on MetricsAttributes will be ignored by MetricAttributeMapHashForCollision
MetricAttributes m1 = {{"k1", "v1"}};
MetricAttributes m2 = {{"k2", "v2"}};
MetricAttributes m3 = {{"k1", "v1"}, {"k2", "v2"}};
MetricAttributes m4 = {};
AttributesHashMapWithCustomHash<MetricAttributeMapHashForCollision> hash_map;
hash_map.Set(m1, std::unique_ptr<Aggregation>(new DropAggregation()));
hash_map.Set(m2, std::unique_ptr<Aggregation>(new DropAggregation()));
hash_map.Set(m3, std::unique_ptr<Aggregation>(new DropAggregation()));
hash_map.Set(m4, std::unique_ptr<Aggregation>(new DropAggregation()));
EXPECT_EQ(hash_map.Size(), 4);
EXPECT_EQ(hash_map.Has(m1), true);
EXPECT_EQ(hash_map.Has(m2), true);
EXPECT_EQ(hash_map.Has(m3), true);
EXPECT_EQ(hash_map.Has(m4), true);
MetricAttributes m5 = {{"k2", "v1"}};
EXPECT_EQ(hash_map.Has(m5), false);
//
// Verify only one bucket used based on the custom hash
//
size_t total_active_buckets = 0;
size_t total_elements = 0;
for (size_t i = 0; i < hash_map.BucketCount(); i++)
{
size_t bucket_size = hash_map.BucketSize(i);
if (bucket_size > 0)
{
total_active_buckets++;
total_elements += bucket_size;
}
}
EXPECT_EQ(total_active_buckets, 1);
EXPECT_EQ(total_elements, 4);
}
TEST(AttributesHashMap, HashConsistencyAcrossStringTypes)
{
const char *c_str = "teststring";
std::string std_str = "teststring";
nostd::string_view nostd_str_view = "teststring";
#if __cplusplus >= 201703L
std::string_view std_str_view = "teststring";
#endif
size_t hash_c_str = 0;
size_t hash_std_str = 0;
size_t hash_nostd_str_view = 0;
#if __cplusplus >= 201703L
size_t hash_std_str_view = 0;
#endif
opentelemetry::sdk::common::GetHash(hash_c_str, c_str);
opentelemetry::sdk::common::GetHash(hash_std_str, std_str);
opentelemetry::sdk::common::GetHash(hash_nostd_str_view, nostd_str_view);
#if __cplusplus >= 201703L
opentelemetry::sdk::common::GetHash(hash_std_str_view, std_str_view);
#endif
EXPECT_EQ(hash_c_str, hash_std_str);
EXPECT_EQ(hash_c_str, hash_nostd_str_view);
#if __cplusplus >= 201703L
EXPECT_EQ(hash_c_str, hash_std_str_view);
#endif
}