mirror of
https://github.com/jupp0r/prometheus-cpp.git
synced 2026-07-22 14:43:33 +00:00
Gregor Jasny
124 lines
3.9 KiB
C++
124 lines
3.9 KiB
C++
#include "prometheus/text_serializer.h"
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#include <gmock/gmock.h>
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#include <gtest/gtest.h>
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#include <cmath>
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#include <limits>
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#include <string>
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#include "prometheus/client_metric.h"
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#include "prometheus/histogram.h"
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#include "prometheus/metric_family.h"
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#include "prometheus/metric_type.h"
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#include "prometheus/summary.h"
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namespace prometheus {
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namespace {
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class TextSerializerTest : public testing::Test {
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public:
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std::string Serialize(MetricType type) const {
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MetricFamily metricFamily;
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metricFamily.name = name;
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metricFamily.help = "my metric help text";
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metricFamily.type = type;
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metricFamily.metric = std::vector<ClientMetric>{metric};
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std::vector<MetricFamily> families{metricFamily};
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return textSerializer.Serialize(families);
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}
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const std::string name = "my_metric";
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ClientMetric metric;
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TextSerializer textSerializer;
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};
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TEST_F(TextSerializerTest, shouldSerializeNotANumber) {
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metric.gauge.value = std::nan("");
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EXPECT_THAT(Serialize(MetricType::Gauge), testing::HasSubstr(name + " Nan"));
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}
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TEST_F(TextSerializerTest, shouldSerializeNegativeInfinity) {
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metric.gauge.value = -std::numeric_limits<double>::infinity();
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EXPECT_THAT(Serialize(MetricType::Gauge), testing::HasSubstr(name + " -Inf"));
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}
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TEST_F(TextSerializerTest, shouldSerializePositiveInfinity) {
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metric.gauge.value = std::numeric_limits<double>::infinity();
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EXPECT_THAT(Serialize(MetricType::Gauge), testing::HasSubstr(name + " +Inf"));
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}
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TEST_F(TextSerializerTest, shouldEscapeBackslash) {
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metric.label.resize(1, ClientMetric::Label{"k", "v\\v"});
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EXPECT_THAT(Serialize(MetricType::Gauge),
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testing::HasSubstr(name + "{k=\"v\\\\v\"}"));
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}
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TEST_F(TextSerializerTest, shouldEscapeNewline) {
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metric.label.resize(1, ClientMetric::Label{"k", "v\nv"});
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EXPECT_THAT(Serialize(MetricType::Gauge),
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testing::HasSubstr(name + "{k=\"v\\nv\"}"));
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}
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TEST_F(TextSerializerTest, shouldEscapeDoubleQuote) {
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metric.label.resize(1, ClientMetric::Label{"k", "v\"v"});
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EXPECT_THAT(Serialize(MetricType::Gauge),
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testing::HasSubstr(name + "{k=\"v\\\"v\"}"));
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}
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TEST_F(TextSerializerTest, shouldSerializeUntyped) {
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metric.untyped.value = 64.0;
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const auto serialized = Serialize(MetricType::Untyped);
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EXPECT_THAT(serialized, testing::HasSubstr(name + " 64\n"));
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}
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TEST_F(TextSerializerTest, shouldSerializeTimestamp) {
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metric.counter.value = 64.0;
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metric.timestamp_ms = 1234;
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const auto serialized = Serialize(MetricType::Counter);
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EXPECT_THAT(serialized, testing::HasSubstr(name + " 64 1234\n"));
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}
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TEST_F(TextSerializerTest, shouldSerializeHistogramWithNoBuckets) {
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metric.histogram.sample_count = 2;
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metric.histogram.sample_sum = 32.0;
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const auto serialized = Serialize(MetricType::Histogram);
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EXPECT_THAT(serialized, testing::HasSubstr(name + "_count 2"));
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EXPECT_THAT(serialized, testing::HasSubstr(name + "_sum 32\n"));
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EXPECT_THAT(serialized, testing::HasSubstr(name + "_bucket{le=\"+Inf\"} 2"));
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}
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TEST_F(TextSerializerTest, shouldSerializeHistogram) {
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Histogram histogram{{1}};
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histogram.Observe(0);
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histogram.Observe(200);
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metric = histogram.Collect();
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const auto serialized = Serialize(MetricType::Histogram);
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EXPECT_THAT(serialized, testing::HasSubstr(name + "_count 2\n"));
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EXPECT_THAT(serialized, testing::HasSubstr(name + "_sum 200\n"));
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EXPECT_THAT(serialized, testing::HasSubstr(name + "_bucket{le=\"1\"} 1\n"));
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EXPECT_THAT(serialized,
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testing::HasSubstr(name + "_bucket{le=\"+Inf\"} 2\n"));
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}
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TEST_F(TextSerializerTest, shouldSerializeSummary) {
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Summary summary{Summary::Quantiles{{0.5, 0.05}}};
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summary.Observe(0);
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summary.Observe(200);
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metric = summary.Collect();
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const auto serialized = Serialize(MetricType::Summary);
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EXPECT_THAT(serialized, testing::HasSubstr(name + "_count 2"));
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EXPECT_THAT(serialized, testing::HasSubstr(name + "_sum 200\n"));
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EXPECT_THAT(serialized, testing::HasSubstr(name + "{quantile=\"0.5\"} 0\n"));
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}
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} // namespace
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} // namespace prometheus
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