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#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <algorithm>
#include <iterator>
#include <map>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "prometheus/client_metric.h"
#include "prometheus/counter.h"
#include "prometheus/family.h"
#include "prometheus/gauge.h"
#include "prometheus/histogram.h"
#include "prometheus/labels.h"
#include "prometheus/registry.h"
#include "prometheus/summary.h"
namespace prometheus {
namespace {
class BuilderTest : public testing::Test {
protected:
std::vector<ClientMetric::Label> getExpectedLabels() {
std::vector<ClientMetric::Label> labels;
auto gen = [](std::pair<const std::string, std::string> p) {
return ClientMetric::Label{p.first, p.second};
};
std::transform(std::begin(const_labels), std::end(const_labels),
std::back_inserter(labels), gen);
std::transform(std::begin(more_labels), std::end(more_labels),
std::back_inserter(labels), gen);
return labels;
}
void verifyCollectedLabels() {
const auto collected = registry.Collect();
ASSERT_EQ(1U, collected.size());
EXPECT_EQ(name, collected.at(0).name);
EXPECT_EQ(help, collected.at(0).help);
ASSERT_EQ(1U, collected.at(0).metric.size());
EXPECT_THAT(collected.at(0).metric.at(0).label,
testing::UnorderedElementsAreArray(expected_labels));
}
Registry registry;
const std::string name = "some_name";
const std::string help = "Additional description.";
const Labels const_labels = {{"key", "value"}};
const Labels more_labels = {{"name", "test"}};
const std::vector<ClientMetric::Label> expected_labels = getExpectedLabels();
};
TEST_F(BuilderTest, build_counter) {
auto& family = BuildCounter()
.Name(name)
.Help(help)
.Labels(const_labels)
.Register(registry);
family.Add(more_labels);
verifyCollectedLabels();
}
TEST_F(BuilderTest, build_gauge) {
auto& family = BuildGauge()
.Name(name)
.Help(help)
.Labels(const_labels)
.Register(registry);
family.Add(more_labels);
verifyCollectedLabels();
}
TEST_F(BuilderTest, build_histogram) {
auto& family = BuildHistogram()
.Name(name)
.Help(help)
.Labels(const_labels)
.Register(registry);
family.Add(more_labels, Histogram::BucketBoundaries{1, 2});
verifyCollectedLabels();
}
TEST_F(BuilderTest, build_summary) {
auto& family = BuildSummary()
.Name(name)
.Help(help)
.Labels(const_labels)
.Register(registry);
family.Add(more_labels, Summary::Quantiles{});
verifyCollectedLabels();
}
} // namespace
} // namespace prometheus
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