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#include "prometheus/registry.h"
#include <gtest/gtest.h>
#include <cstddef>
#include <vector>
#include "prometheus/counter.h"
#include "prometheus/gauge.h"
#include "prometheus/histogram.h"
#include "prometheus/summary.h"
namespace prometheus {
namespace {
TEST(RegistryTest, collect_single_metric_family) {
Registry registry{};
auto& counter_family =
BuildCounter().Name("test").Help("a test").Register(registry);
counter_family.Add({{"name", "counter1"}});
counter_family.Add({{"name", "counter2"}});
auto collected = registry.Collect();
ASSERT_EQ(collected.size(), 1U);
EXPECT_EQ(collected[0].name, "test");
EXPECT_EQ(collected[0].help, "a test");
ASSERT_EQ(collected[0].metric.size(), 2U);
ASSERT_EQ(collected[0].metric.at(0).label.size(), 1U);
EXPECT_EQ(collected[0].metric.at(0).label.at(0).name, "name");
ASSERT_EQ(collected[0].metric.at(1).label.size(), 1U);
EXPECT_EQ(collected[0].metric.at(1).label.at(0).name, "name");
}
TEST(RegistryTest, build_histogram_family) {
Registry registry{};
auto& histogram_family =
BuildHistogram().Name("hist").Help("Test Histogram").Register(registry);
auto& histogram = histogram_family.Add({{"name", "test_histogram_1"}},
Histogram::BucketBoundaries{0, 1, 2});
histogram.Observe(1.1);
auto collected = registry.Collect();
ASSERT_EQ(collected.size(), 1U);
}
TEST(RegistryTest, unable_to_remove_family) {
Family<Counter> family{"name", "help", {}};
Registry registry{};
EXPECT_FALSE(registry.Remove(family));
}
TEST(RegistryTest, remove_and_readd_family) {
Registry registry{Registry::InsertBehavior::Throw};
auto& counter = BuildCounter().Name("name").Register(registry);
EXPECT_TRUE(registry.Remove(counter));
EXPECT_NO_THROW(BuildCounter().Name("name").Register(registry));
}
TEST(RegistryTest, reject_different_type_than_counter) {
const auto same_name = std::string{"same_name"};
Registry registry{};
EXPECT_NO_THROW(BuildCounter().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildGauge().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildHistogram().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildSummary().Name(same_name).Register(registry));
}
TEST(RegistryTest, reject_different_type_than_gauge) {
const auto same_name = std::string{"same_name"};
Registry registry{};
EXPECT_NO_THROW(BuildGauge().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildCounter().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildHistogram().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildSummary().Name(same_name).Register(registry));
}
TEST(RegistryTest, reject_different_type_than_histogram) {
const auto same_name = std::string{"same_name"};
Registry registry{};
EXPECT_NO_THROW(BuildHistogram().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildCounter().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildGauge().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildSummary().Name(same_name).Register(registry));
}
TEST(RegistryTest, reject_different_type_than_summary) {
const auto same_name = std::string{"same_name"};
Registry registry{};
EXPECT_NO_THROW(BuildSummary().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildCounter().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildGauge().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildHistogram().Name(same_name).Register(registry));
}
TEST(RegistryTest, throw_for_same_family_name) {
const auto same_name = std::string{"same_name"};
Registry registry{Registry::InsertBehavior::Throw};
EXPECT_NO_THROW(BuildCounter().Name(same_name).Register(registry));
EXPECT_ANY_THROW(BuildCounter().Name(same_name).Register(registry));
}
TEST(RegistryTest, merge_same_families) {
Registry registry{Registry::InsertBehavior::Merge};
std::size_t loops = 4;
while (loops-- > 0) {
BuildCounter()
.Name("counter")
.Help("Test Counter")
.Register(registry)
.Add({{"name", "test_counter"}});
}
auto collected = registry.Collect();
EXPECT_EQ(1U, collected.size());
}
TEST(RegistryTest, do_not_merge_families_with_different_labels) {
Registry registry{Registry::InsertBehavior::Merge};
EXPECT_NO_THROW(BuildCounter()
.Name("counter")
.Help("Test Counter")
.Labels({{"a", "A"}})
.Register(registry));
EXPECT_ANY_THROW(BuildCounter()
.Name("counter")
.Help("Test Counter")
.Labels({{"b", "B"}})
.Register(registry));
}
} // namespace
} // namespace prometheus
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