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PrometheusSerializerTests.cs
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PrometheusSerializerTests.cs
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// <copyright file="PrometheusSerializerTests.cs" company="OpenTelemetry Authors">
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// </copyright>
using System.Collections.Generic;
using System.Diagnostics.Metrics;
using System.Text;
using OpenTelemetry.Metrics;
using OpenTelemetry.Tests;
using Xunit;
namespace OpenTelemetry.Exporter.Prometheus.Tests
{
public sealed class PrometheusSerializerTests
{
[Fact]
public void GaugeZeroDimension()
{
var buffer = new byte[85000];
var metrics = new List<Metric>();
using var meter = new Meter(Utils.GetCurrentMethodName());
using var provider = Sdk.CreateMeterProviderBuilder()
.AddMeter(meter.Name)
.AddInMemoryExporter(metrics)
.Build();
meter.CreateObservableGauge("test_gauge", () => 123);
provider.ForceFlush();
var cursor = PrometheusSerializer.WriteMetric(buffer, 0, metrics[0]);
Assert.Matches(
("^"
+ "# TYPE test_gauge gauge\n"
+ "test_gauge 123 \\d+\n"
+ "$").Replace('\'', '"'),
Encoding.UTF8.GetString(buffer, 0, cursor));
}
[Fact]
public void GaugeZeroDimensionWithDescription()
{
var buffer = new byte[85000];
var metrics = new List<Metric>();
using var meter = new Meter(Utils.GetCurrentMethodName());
using var provider = Sdk.CreateMeterProviderBuilder()
.AddMeter(meter.Name)
.AddInMemoryExporter(metrics)
.Build();
meter.CreateObservableGauge("test_gauge", () => 123, description: "Hello, world!");
provider.ForceFlush();
var cursor = PrometheusSerializer.WriteMetric(buffer, 0, metrics[0]);
Assert.Matches(
("^"
+ "# HELP test_gauge Hello, world!\n"
+ "# TYPE test_gauge gauge\n"
+ "test_gauge 123 \\d+\n"
+ "$").Replace('\'', '"'),
Encoding.UTF8.GetString(buffer, 0, cursor));
}
[Fact]
public void GaugeZeroDimensionWithUnit()
{
var buffer = new byte[85000];
var metrics = new List<Metric>();
using var meter = new Meter(Utils.GetCurrentMethodName());
using var provider = Sdk.CreateMeterProviderBuilder()
.AddMeter(meter.Name)
.AddInMemoryExporter(metrics)
.Build();
meter.CreateObservableGauge("test_gauge", () => 123, unit: "seconds");
provider.ForceFlush();
var cursor = PrometheusSerializer.WriteMetric(buffer, 0, metrics[0]);
Assert.Matches(
("^"
+ "# TYPE test_gauge_seconds gauge\n"
+ "test_gauge_seconds 123 \\d+\n"
+ "$").Replace('\'', '"'),
Encoding.UTF8.GetString(buffer, 0, cursor));
}
[Fact]
public void GaugeOneDimension()
{
var buffer = new byte[85000];
var metrics = new List<Metric>();
using var meter = new Meter(Utils.GetCurrentMethodName());
using var provider = Sdk.CreateMeterProviderBuilder()
.AddMeter(meter.Name)
.AddInMemoryExporter(metrics)
.Build();
meter.CreateObservableGauge(
"test_gauge",
() => new Measurement<long>(123, new KeyValuePair<string, object>("tagKey", "tagValue")));
provider.ForceFlush();
var cursor = PrometheusSerializer.WriteMetric(buffer, 0, metrics[0]);
Assert.Matches(
("^"
+ "# TYPE test_gauge gauge\n"
+ "test_gauge{tagKey='tagValue'} 123 \\d+\n"
+ "$").Replace('\'', '"'),
Encoding.UTF8.GetString(buffer, 0, cursor));
}
[Fact]
public void GaugeDoubleSubnormal()
{
var buffer = new byte[85000];
var metrics = new List<Metric>();
using var meter = new Meter(Utils.GetCurrentMethodName());
using var provider = Sdk.CreateMeterProviderBuilder()
.AddMeter(meter.Name)
.AddInMemoryExporter(metrics)
.Build();
meter.CreateObservableGauge("test_gauge", () => new List<Measurement<double>>
{
new(double.NegativeInfinity, new("x", "1"), new("y", "2")),
new(double.PositiveInfinity, new("x", "3"), new("y", "4")),
new(double.NaN, new("x", "5"), new("y", "6")),
});
provider.ForceFlush();
var cursor = PrometheusSerializer.WriteMetric(buffer, 0, metrics[0]);
Assert.Matches(
("^"
+ "# TYPE test_gauge gauge\n"
+ "test_gauge{x='1',y='2'} -Inf \\d+\n"
+ "test_gauge{x='3',y='4'} \\+Inf \\d+\n"
+ "test_gauge{x='5',y='6'} Nan \\d+\n"
+ "$").Replace('\'', '"'),
Encoding.UTF8.GetString(buffer, 0, cursor));
}
[Fact]
public void SumDoubleInfinites()
{
var buffer = new byte[85000];
var metrics = new List<Metric>();
using var meter = new Meter(Utils.GetCurrentMethodName());
using var provider = Sdk.CreateMeterProviderBuilder()
.AddMeter(meter.Name)
.AddInMemoryExporter(metrics)
.Build();
var counter = meter.CreateCounter<double>("test_counter");
counter.Add(1.0E308);
counter.Add(1.0E308);
provider.ForceFlush();
var cursor = PrometheusSerializer.WriteMetric(buffer, 0, metrics[0]);
Assert.Matches(
("^"
+ "# TYPE test_counter counter\n"
+ "test_counter \\+Inf \\d+\n"
+ "$").Replace('\'', '"'),
Encoding.UTF8.GetString(buffer, 0, cursor));
}
[Fact]
public void HistogramZeroDimension()
{
var buffer = new byte[85000];
var metrics = new List<Metric>();
using var meter = new Meter(Utils.GetCurrentMethodName());
using var provider = Sdk.CreateMeterProviderBuilder()
.AddMeter(meter.Name)
.AddInMemoryExporter(metrics)
.Build();
var histogram = meter.CreateHistogram<double>("test_histogram");
histogram.Record(18);
histogram.Record(100);
provider.ForceFlush();
var cursor = PrometheusSerializer.WriteMetric(buffer, 0, metrics[0]);
Assert.Matches(
("^"
+ "# TYPE test_histogram histogram\n"
+ "test_histogram_bucket{le='0'} 0 \\d+\n"
+ "test_histogram_bucket{le='5'} 0 \\d+\n"
+ "test_histogram_bucket{le='10'} 0 \\d+\n"
+ "test_histogram_bucket{le='25'} 1 \\d+\n"
+ "test_histogram_bucket{le='50'} 1 \\d+\n"
+ "test_histogram_bucket{le='75'} 1 \\d+\n"
+ "test_histogram_bucket{le='100'} 2 \\d+\n"
+ "test_histogram_bucket{le='250'} 2 \\d+\n"
+ "test_histogram_bucket{le='500'} 2 \\d+\n"
+ "test_histogram_bucket{le='1000'} 2 \\d+\n"
+ "test_histogram_bucket{le='\\+Inf'} 2 \\d+\n"
+ "test_histogram_sum 118 \\d+\n"
+ "test_histogram_count 2 \\d+\n"
+ "$").Replace('\'', '"'),
Encoding.UTF8.GetString(buffer, 0, cursor));
}
[Fact]
public void HistogramOneDimension()
{
var buffer = new byte[85000];
var metrics = new List<Metric>();
using var meter = new Meter(Utils.GetCurrentMethodName());
using var provider = Sdk.CreateMeterProviderBuilder()
.AddMeter(meter.Name)
.AddInMemoryExporter(metrics)
.Build();
var histogram = meter.CreateHistogram<double>("test_histogram");
histogram.Record(18, new KeyValuePair<string, object>("x", "1"));
histogram.Record(100, new KeyValuePair<string, object>("x", "1"));
provider.ForceFlush();
var cursor = PrometheusSerializer.WriteMetric(buffer, 0, metrics[0]);
Assert.Matches(
("^"
+ "# TYPE test_histogram histogram\n"
+ "test_histogram_bucket{x='1',le='0'} 0 \\d+\n"
+ "test_histogram_bucket{x='1',le='5'} 0 \\d+\n"
+ "test_histogram_bucket{x='1',le='10'} 0 \\d+\n"
+ "test_histogram_bucket{x='1',le='25'} 1 \\d+\n"
+ "test_histogram_bucket{x='1',le='50'} 1 \\d+\n"
+ "test_histogram_bucket{x='1',le='75'} 1 \\d+\n"
+ "test_histogram_bucket{x='1',le='100'} 2 \\d+\n"
+ "test_histogram_bucket{x='1',le='250'} 2 \\d+\n"
+ "test_histogram_bucket{x='1',le='500'} 2 \\d+\n"
+ "test_histogram_bucket{x='1',le='1000'} 2 \\d+\n"
+ "test_histogram_bucket{x='1',le='\\+Inf'} 2 \\d+\n"
+ "test_histogram_sum{x='1'} 118 \\d+\n"
+ "test_histogram_count{x='1'} 2 \\d+\n"
+ "$").Replace('\'', '"'),
Encoding.UTF8.GetString(buffer, 0, cursor));
}
[Fact]
public void HistogramTwoDimensions()
{
var buffer = new byte[85000];
var metrics = new List<Metric>();
using var meter = new Meter(Utils.GetCurrentMethodName());
using var provider = Sdk.CreateMeterProviderBuilder()
.AddMeter(meter.Name)
.AddInMemoryExporter(metrics)
.Build();
var histogram = meter.CreateHistogram<double>("test_histogram");
histogram.Record(18, new("x", "1"), new("y", "2"));
histogram.Record(100, new("x", "1"), new("y", "2"));
provider.ForceFlush();
var cursor = PrometheusSerializer.WriteMetric(buffer, 0, metrics[0]);
Assert.Matches(
("^"
+ "# TYPE test_histogram histogram\n"
+ "test_histogram_bucket{x='1',y='2',le='0'} 0 \\d+\n"
+ "test_histogram_bucket{x='1',y='2',le='5'} 0 \\d+\n"
+ "test_histogram_bucket{x='1',y='2',le='10'} 0 \\d+\n"
+ "test_histogram_bucket{x='1',y='2',le='25'} 1 \\d+\n"
+ "test_histogram_bucket{x='1',y='2',le='50'} 1 \\d+\n"
+ "test_histogram_bucket{x='1',y='2',le='75'} 1 \\d+\n"
+ "test_histogram_bucket{x='1',y='2',le='100'} 2 \\d+\n"
+ "test_histogram_bucket{x='1',y='2',le='250'} 2 \\d+\n"
+ "test_histogram_bucket{x='1',y='2',le='500'} 2 \\d+\n"
+ "test_histogram_bucket{x='1',y='2',le='1000'} 2 \\d+\n"
+ "test_histogram_bucket{x='1',y='2',le='\\+Inf'} 2 \\d+\n"
+ "test_histogram_sum{x='1',y='2'} 118 \\d+\n"
+ "test_histogram_count{x='1',y='2'} 2 \\d+\n"
+ "$").Replace('\'', '"'),
Encoding.UTF8.GetString(buffer, 0, cursor));
}
[Fact]
public void HistogramInfinites()
{
var buffer = new byte[85000];
var metrics = new List<Metric>();
using var meter = new Meter(Utils.GetCurrentMethodName());
using var provider = Sdk.CreateMeterProviderBuilder()
.AddMeter(meter.Name)
.AddInMemoryExporter(metrics)
.Build();
var histogram = meter.CreateHistogram<double>("test_histogram");
histogram.Record(18);
histogram.Record(double.PositiveInfinity);
histogram.Record(double.PositiveInfinity);
provider.ForceFlush();
var cursor = PrometheusSerializer.WriteMetric(buffer, 0, metrics[0]);
Assert.Matches(
("^"
+ "# TYPE test_histogram histogram\n"
+ "test_histogram_bucket{le='0'} 0 \\d+\n"
+ "test_histogram_bucket{le='5'} 0 \\d+\n"
+ "test_histogram_bucket{le='10'} 0 \\d+\n"
+ "test_histogram_bucket{le='25'} 1 \\d+\n"
+ "test_histogram_bucket{le='50'} 1 \\d+\n"
+ "test_histogram_bucket{le='75'} 1 \\d+\n"
+ "test_histogram_bucket{le='100'} 1 \\d+\n"
+ "test_histogram_bucket{le='250'} 1 \\d+\n"
+ "test_histogram_bucket{le='500'} 1 \\d+\n"
+ "test_histogram_bucket{le='1000'} 1 \\d+\n"
+ "test_histogram_bucket{le='\\+Inf'} 3 \\d+\n"
+ "test_histogram_sum \\+Inf \\d+\n"
+ "test_histogram_count 3 \\d+\n"
+ "$").Replace('\'', '"'),
Encoding.UTF8.GetString(buffer, 0, cursor));
}
[Fact]
public void HistogramNaN()
{
var buffer = new byte[85000];
var metrics = new List<Metric>();
using var meter = new Meter(Utils.GetCurrentMethodName());
using var provider = Sdk.CreateMeterProviderBuilder()
.AddMeter(meter.Name)
.AddInMemoryExporter(metrics)
.Build();
var histogram = meter.CreateHistogram<double>("test_histogram");
histogram.Record(18);
histogram.Record(double.PositiveInfinity);
histogram.Record(double.NaN);
provider.ForceFlush();
var cursor = PrometheusSerializer.WriteMetric(buffer, 0, metrics[0]);
Assert.Matches(
("^"
+ "# TYPE test_histogram histogram\n"
+ "test_histogram_bucket{le='0'} 0 \\d+\n"
+ "test_histogram_bucket{le='5'} 0 \\d+\n"
+ "test_histogram_bucket{le='10'} 0 \\d+\n"
+ "test_histogram_bucket{le='25'} 1 \\d+\n"
+ "test_histogram_bucket{le='50'} 1 \\d+\n"
+ "test_histogram_bucket{le='75'} 1 \\d+\n"
+ "test_histogram_bucket{le='100'} 1 \\d+\n"
+ "test_histogram_bucket{le='250'} 1 \\d+\n"
+ "test_histogram_bucket{le='500'} 1 \\d+\n"
+ "test_histogram_bucket{le='1000'} 1 \\d+\n"
+ "test_histogram_bucket{le='\\+Inf'} 3 \\d+\n"
+ "test_histogram_sum Nan \\d+\n"
+ "test_histogram_count 3 \\d+\n"
+ "$").Replace('\'', '"'),
Encoding.UTF8.GetString(buffer, 0, cursor));
}
}
}