719 lines
30 KiB
C#
719 lines
30 KiB
C#
// <copyright file="OtlpMetricsExporterTests.cs" company="OpenTelemetry Authors">
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// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// </copyright>
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using System.Diagnostics.Metrics;
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using Microsoft.Extensions.DependencyInjection;
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using OpenTelemetry.Exporter.OpenTelemetryProtocol.Implementation;
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using OpenTelemetry.Metrics;
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using OpenTelemetry.Resources;
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using OpenTelemetry.Tests;
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using OpenTelemetry.Trace;
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using Xunit;
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using OtlpCollector = OpenTelemetry.Proto.Collector.Metrics.V1;
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using OtlpMetrics = OpenTelemetry.Proto.Metrics.V1;
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namespace OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests
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{
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public class OtlpMetricsExporterTests : Http2UnencryptedSupportTests
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{
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[Fact]
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public void TestAddOtlpExporter_SetsCorrectMetricReaderDefaults()
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{
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if (Environment.Version.Major == 3)
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{
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// Adding the OtlpExporter creates a GrpcChannel.
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// This switch must be set before creating a GrpcChannel when calling an insecure HTTP/2 endpoint.
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// See: https://docs.microsoft.com/aspnet/core/grpc/troubleshoot#call-insecure-grpc-services-with-net-core-client
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AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
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}
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var meterProvider = Sdk.CreateMeterProviderBuilder()
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.AddOtlpExporter()
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.Build();
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CheckMetricReaderDefaults();
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meterProvider.Dispose();
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meterProvider = Sdk.CreateMeterProviderBuilder()
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.AddOtlpExporter()
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.Build();
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CheckMetricReaderDefaults();
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meterProvider.Dispose();
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void CheckMetricReaderDefaults()
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{
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var bindingFlags = System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance;
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var metricReader = typeof(MetricReader)
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.Assembly
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.GetType("OpenTelemetry.Metrics.MeterProviderSdk")
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.GetField("reader", bindingFlags)
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.GetValue(meterProvider) as PeriodicExportingMetricReader;
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Assert.NotNull(metricReader);
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var exportIntervalMilliseconds = (int)typeof(PeriodicExportingMetricReader)
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.GetField("ExportIntervalMilliseconds", bindingFlags)
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.GetValue(metricReader);
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Assert.Equal(60000, exportIntervalMilliseconds);
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}
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}
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[Fact]
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public void TestAddOtlpExporter_NamedOptions()
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{
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int defaultExporterOptionsConfigureOptionsInvocations = 0;
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int namedExporterOptionsConfigureOptionsInvocations = 0;
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using var meterProvider = Sdk.CreateMeterProviderBuilder()
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.ConfigureServices(services =>
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{
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services.Configure<OtlpExporterOptions>(o => defaultExporterOptionsConfigureOptionsInvocations++);
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services.Configure<MetricReaderOptions>(o => defaultExporterOptionsConfigureOptionsInvocations++);
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services.Configure<OtlpExporterOptions>("Exporter2", o => namedExporterOptionsConfigureOptionsInvocations++);
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services.Configure<MetricReaderOptions>("Exporter2", o => namedExporterOptionsConfigureOptionsInvocations++);
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services.Configure<OtlpExporterOptions>("Exporter3", o => namedExporterOptionsConfigureOptionsInvocations++);
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services.Configure<MetricReaderOptions>("Exporter3", o => namedExporterOptionsConfigureOptionsInvocations++);
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})
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.AddOtlpExporter()
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.AddOtlpExporter("Exporter2", o => { })
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.AddOtlpExporter("Exporter3", (eo, ro) => { })
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.Build();
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Assert.Equal(2, defaultExporterOptionsConfigureOptionsInvocations);
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Assert.Equal(4, namedExporterOptionsConfigureOptionsInvocations);
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}
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[Fact]
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public void UserHttpFactoryCalled()
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{
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OtlpExporterOptions options = new OtlpExporterOptions();
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var defaultFactory = options.HttpClientFactory;
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int invocations = 0;
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options.Protocol = OtlpExportProtocol.HttpProtobuf;
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options.HttpClientFactory = () =>
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{
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invocations++;
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return defaultFactory();
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};
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using (var exporter = new OtlpMetricExporter(options))
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{
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Assert.Equal(1, invocations);
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}
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using (var provider = Sdk.CreateMeterProviderBuilder()
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.AddOtlpExporter(o =>
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{
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o.Protocol = OtlpExportProtocol.HttpProtobuf;
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o.HttpClientFactory = options.HttpClientFactory;
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})
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.Build())
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{
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Assert.Equal(2, invocations);
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}
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options.HttpClientFactory = null;
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Assert.Throws<InvalidOperationException>(() =>
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{
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using var exporter = new OtlpMetricExporter(options);
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});
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options.HttpClientFactory = () => null;
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Assert.Throws<InvalidOperationException>(() =>
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{
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using var exporter = new OtlpMetricExporter(options);
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});
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}
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[Fact]
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public void ServiceProviderHttpClientFactoryInvoked()
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{
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IServiceCollection services = new ServiceCollection();
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services.AddHttpClient();
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int invocations = 0;
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services.AddHttpClient("OtlpMetricExporter", configureClient: (client) => invocations++);
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services.AddOpenTelemetry().WithMetrics(builder => builder
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.AddOtlpExporter(o => o.Protocol = OtlpExportProtocol.HttpProtobuf));
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using var serviceProvider = services.BuildServiceProvider();
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var meterProvider = serviceProvider.GetRequiredService<MeterProvider>();
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Assert.Equal(1, invocations);
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}
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[Theory]
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[InlineData(true)]
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[InlineData(false)]
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public void ToOtlpResourceMetricsTest(bool includeServiceNameInResource)
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{
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var resourceBuilder = ResourceBuilder.CreateEmpty();
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if (includeServiceNameInResource)
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{
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resourceBuilder.AddAttributes(
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new List<KeyValuePair<string, object>>
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{
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new KeyValuePair<string, object>(ResourceSemanticConventions.AttributeServiceName, "service-name"),
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new KeyValuePair<string, object>(ResourceSemanticConventions.AttributeServiceNamespace, "ns1"),
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});
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}
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var metrics = new List<Metric>();
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using var meter = new Meter($"{Utils.GetCurrentMethodName()}.{includeServiceNameInResource}", "0.0.1");
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using var provider = Sdk.CreateMeterProviderBuilder()
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.SetResourceBuilder(resourceBuilder)
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.AddMeter(meter.Name)
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.AddInMemoryExporter(metrics)
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.Build();
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var counter = meter.CreateCounter<int>("counter");
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counter.Add(100);
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provider.ForceFlush();
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var batch = new Batch<Metric>(metrics.ToArray(), metrics.Count);
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var request = new OtlpCollector.ExportMetricsServiceRequest();
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request.AddMetrics(resourceBuilder.Build().ToOtlpResource(), batch);
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Assert.Single(request.ResourceMetrics);
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var resourceMetric = request.ResourceMetrics.First();
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var otlpResource = resourceMetric.Resource;
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if (includeServiceNameInResource)
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{
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Assert.Contains(otlpResource.Attributes, (kvp) => kvp.Key == ResourceSemanticConventions.AttributeServiceName && kvp.Value.StringValue == "service-name");
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Assert.Contains(otlpResource.Attributes, (kvp) => kvp.Key == ResourceSemanticConventions.AttributeServiceNamespace && kvp.Value.StringValue == "ns1");
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}
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else
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{
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Assert.Contains(otlpResource.Attributes, (kvp) => kvp.Key == ResourceSemanticConventions.AttributeServiceName && kvp.Value.ToString().Contains("unknown_service:"));
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}
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Assert.Single(resourceMetric.ScopeMetrics);
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var instrumentationLibraryMetrics = resourceMetric.ScopeMetrics.First();
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Assert.Equal(string.Empty, instrumentationLibraryMetrics.SchemaUrl);
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Assert.Equal(meter.Name, instrumentationLibraryMetrics.Scope.Name);
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Assert.Equal("0.0.1", instrumentationLibraryMetrics.Scope.Version);
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}
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[Theory]
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[InlineData("test_gauge", null, null, 123L, null)]
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[InlineData("test_gauge", null, null, null, 123.45)]
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[InlineData("test_gauge", "description", "unit", 123L, null)]
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public void TestGaugeToOtlpMetric(string name, string description, string unit, long? longValue, double? doubleValue)
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{
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var metrics = new List<Metric>();
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using var meter = new Meter(Utils.GetCurrentMethodName());
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using var provider = Sdk.CreateMeterProviderBuilder()
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.AddMeter(meter.Name)
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.AddInMemoryExporter(metrics)
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.Build();
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if (longValue.HasValue)
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{
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meter.CreateObservableGauge(name, () => longValue.Value, unit, description);
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}
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else
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{
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meter.CreateObservableGauge(name, () => doubleValue.Value, unit, description);
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}
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provider.ForceFlush();
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var batch = new Batch<Metric>(metrics.ToArray(), metrics.Count);
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var request = new OtlpCollector.ExportMetricsServiceRequest();
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request.AddMetrics(ResourceBuilder.CreateEmpty().Build().ToOtlpResource(), batch);
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var resourceMetric = request.ResourceMetrics.Single();
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var scopeMetrics = resourceMetric.ScopeMetrics.Single();
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var actual = scopeMetrics.Metrics.Single();
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Assert.Equal(name, actual.Name);
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Assert.Equal(description ?? string.Empty, actual.Description);
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Assert.Equal(unit ?? string.Empty, actual.Unit);
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Assert.Equal(OtlpMetrics.Metric.DataOneofCase.Gauge, actual.DataCase);
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Assert.NotNull(actual.Gauge);
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Assert.Null(actual.Sum);
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Assert.Null(actual.Histogram);
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Assert.Null(actual.ExponentialHistogram);
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Assert.Null(actual.Summary);
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Assert.Single(actual.Gauge.DataPoints);
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var dataPoint = actual.Gauge.DataPoints.First();
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Assert.True(dataPoint.StartTimeUnixNano > 0);
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Assert.True(dataPoint.TimeUnixNano > 0);
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if (longValue.HasValue)
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{
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Assert.Equal(OtlpMetrics.NumberDataPoint.ValueOneofCase.AsInt, dataPoint.ValueCase);
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Assert.Equal(longValue, dataPoint.AsInt);
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}
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else
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{
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Assert.Equal(OtlpMetrics.NumberDataPoint.ValueOneofCase.AsDouble, dataPoint.ValueCase);
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Assert.Equal(doubleValue, dataPoint.AsDouble);
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}
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Assert.Empty(dataPoint.Attributes);
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Assert.Empty(dataPoint.Exemplars);
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}
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[Theory]
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[InlineData("test_counter", null, null, 123L, null, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_counter", null, null, null, 123.45, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_counter", null, null, 123L, null, MetricReaderTemporalityPreference.Delta)]
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[InlineData("test_counter", "description", "unit", 123L, null, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_counter", null, null, 123L, null, MetricReaderTemporalityPreference.Delta, "key1", "value1", "key2", 123)]
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public void TestCounterToOtlpMetric(string name, string description, string unit, long? longValue, double? doubleValue, MetricReaderTemporalityPreference aggregationTemporality, params object[] keysValues)
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{
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var metrics = new List<Metric>();
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using var meter = new Meter(Utils.GetCurrentMethodName());
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using var provider = Sdk.CreateMeterProviderBuilder()
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.AddMeter(meter.Name)
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.AddInMemoryExporter(metrics, metricReaderOptions =>
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{
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metricReaderOptions.TemporalityPreference = aggregationTemporality;
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})
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.Build();
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var attributes = ToAttributes(keysValues).ToArray();
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if (longValue.HasValue)
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{
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var counter = meter.CreateCounter<long>(name, unit, description);
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counter.Add(longValue.Value, attributes);
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}
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else
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{
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var counter = meter.CreateCounter<double>(name, unit, description);
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counter.Add(doubleValue.Value, attributes);
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}
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provider.ForceFlush();
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var batch = new Batch<Metric>(metrics.ToArray(), metrics.Count);
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var request = new OtlpCollector.ExportMetricsServiceRequest();
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request.AddMetrics(ResourceBuilder.CreateEmpty().Build().ToOtlpResource(), batch);
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var resourceMetric = request.ResourceMetrics.Single();
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var scopeMetrics = resourceMetric.ScopeMetrics.Single();
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var actual = scopeMetrics.Metrics.Single();
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Assert.Equal(name, actual.Name);
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Assert.Equal(description ?? string.Empty, actual.Description);
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Assert.Equal(unit ?? string.Empty, actual.Unit);
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Assert.Equal(OtlpMetrics.Metric.DataOneofCase.Sum, actual.DataCase);
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Assert.Null(actual.Gauge);
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Assert.NotNull(actual.Sum);
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Assert.Null(actual.Histogram);
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Assert.Null(actual.ExponentialHistogram);
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Assert.Null(actual.Summary);
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Assert.True(actual.Sum.IsMonotonic);
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var otlpAggregationTemporality = aggregationTemporality == MetricReaderTemporalityPreference.Cumulative
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? OtlpMetrics.AggregationTemporality.Cumulative
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: OtlpMetrics.AggregationTemporality.Delta;
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Assert.Equal(otlpAggregationTemporality, actual.Sum.AggregationTemporality);
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Assert.Single(actual.Sum.DataPoints);
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var dataPoint = actual.Sum.DataPoints.First();
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Assert.True(dataPoint.StartTimeUnixNano > 0);
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Assert.True(dataPoint.TimeUnixNano > 0);
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if (longValue.HasValue)
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{
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Assert.Equal(OtlpMetrics.NumberDataPoint.ValueOneofCase.AsInt, dataPoint.ValueCase);
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Assert.Equal(longValue, dataPoint.AsInt);
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}
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else
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{
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Assert.Equal(OtlpMetrics.NumberDataPoint.ValueOneofCase.AsDouble, dataPoint.ValueCase);
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Assert.Equal(doubleValue, dataPoint.AsDouble);
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}
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if (attributes.Length > 0)
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{
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OtlpTestHelpers.AssertOtlpAttributes(attributes, dataPoint.Attributes);
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}
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else
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{
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Assert.Empty(dataPoint.Attributes);
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}
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Assert.Empty(dataPoint.Exemplars);
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}
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[Theory]
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[InlineData("test_counter", null, null, 123L, null, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_counter", null, null, null, 123.45, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_counter", null, null, -123L, null, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_counter", null, null, null, -123.45, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_counter", null, null, 123L, null, MetricReaderTemporalityPreference.Delta)]
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[InlineData("test_counter", "description", "unit", 123L, null, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_counter", null, null, 123L, null, MetricReaderTemporalityPreference.Delta, "key1", "value1", "key2", 123)]
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public void TestUpDownCounterToOtlpMetric(string name, string description, string unit, long? longValue, double? doubleValue, MetricReaderTemporalityPreference aggregationTemporality, params object[] keysValues)
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{
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var metrics = new List<Metric>();
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using var meter = new Meter(Utils.GetCurrentMethodName());
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using var provider = Sdk.CreateMeterProviderBuilder()
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.AddMeter(meter.Name)
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.AddInMemoryExporter(metrics, metricReaderOptions =>
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{
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metricReaderOptions.TemporalityPreference = aggregationTemporality;
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})
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.Build();
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var attributes = ToAttributes(keysValues).ToArray();
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if (longValue.HasValue)
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{
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var counter = meter.CreateUpDownCounter<long>(name, unit, description);
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counter.Add(longValue.Value, attributes);
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}
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else
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{
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var counter = meter.CreateUpDownCounter<double>(name, unit, description);
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counter.Add(doubleValue.Value, attributes);
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}
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provider.ForceFlush();
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var batch = new Batch<Metric>(metrics.ToArray(), metrics.Count);
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var request = new OtlpCollector.ExportMetricsServiceRequest();
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request.AddMetrics(ResourceBuilder.CreateEmpty().Build().ToOtlpResource(), batch);
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var resourceMetric = request.ResourceMetrics.Single();
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var scopeMetrics = resourceMetric.ScopeMetrics.Single();
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var actual = scopeMetrics.Metrics.Single();
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Assert.Equal(name, actual.Name);
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Assert.Equal(description ?? string.Empty, actual.Description);
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Assert.Equal(unit ?? string.Empty, actual.Unit);
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Assert.Equal(OtlpMetrics.Metric.DataOneofCase.Sum, actual.DataCase);
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Assert.Null(actual.Gauge);
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Assert.NotNull(actual.Sum);
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Assert.Null(actual.Histogram);
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Assert.Null(actual.ExponentialHistogram);
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Assert.Null(actual.Summary);
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Assert.False(actual.Sum.IsMonotonic);
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var otlpAggregationTemporality = aggregationTemporality == MetricReaderTemporalityPreference.Cumulative
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? OtlpMetrics.AggregationTemporality.Cumulative
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: OtlpMetrics.AggregationTemporality.Cumulative;
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Assert.Equal(otlpAggregationTemporality, actual.Sum.AggregationTemporality);
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Assert.Single(actual.Sum.DataPoints);
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var dataPoint = actual.Sum.DataPoints.First();
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Assert.True(dataPoint.StartTimeUnixNano > 0);
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Assert.True(dataPoint.TimeUnixNano > 0);
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if (longValue.HasValue)
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{
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Assert.Equal(OtlpMetrics.NumberDataPoint.ValueOneofCase.AsInt, dataPoint.ValueCase);
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Assert.Equal(longValue, dataPoint.AsInt);
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}
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else
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{
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Assert.Equal(OtlpMetrics.NumberDataPoint.ValueOneofCase.AsDouble, dataPoint.ValueCase);
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Assert.Equal(doubleValue, dataPoint.AsDouble);
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}
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if (attributes.Length > 0)
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{
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OtlpTestHelpers.AssertOtlpAttributes(attributes, dataPoint.Attributes);
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}
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else
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{
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Assert.Empty(dataPoint.Attributes);
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}
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Assert.Empty(dataPoint.Exemplars);
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}
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[Theory]
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[InlineData("test_histogram", null, null, 123L, null, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_histogram", null, null, null, 123.45, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_histogram", null, null, -123L, null, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_histogram", null, null, null, -123.45, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_histogram", null, null, 123L, null, MetricReaderTemporalityPreference.Delta)]
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[InlineData("test_histogram", "description", "unit", 123L, null, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_histogram", null, null, 123L, null, MetricReaderTemporalityPreference.Delta, "key1", "value1", "key2", 123)]
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public void TestExponentialHistogramToOtlpMetric(string name, string description, string unit, long? longValue, double? doubleValue, MetricReaderTemporalityPreference aggregationTemporality, params object[] keysValues)
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{
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var metrics = new List<Metric>();
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using var meter = new Meter(Utils.GetCurrentMethodName());
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using var provider = Sdk.CreateMeterProviderBuilder()
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.AddMeter(meter.Name)
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.AddInMemoryExporter(metrics, metricReaderOptions =>
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{
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metricReaderOptions.TemporalityPreference = aggregationTemporality;
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})
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.AddView(instrument =>
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{
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return new Base2ExponentialBucketHistogramConfiguration();
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})
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.Build();
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var attributes = ToAttributes(keysValues).ToArray();
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if (longValue.HasValue)
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{
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var histogram = meter.CreateHistogram<long>(name, unit, description);
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histogram.Record(longValue.Value, attributes);
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histogram.Record(0, attributes);
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}
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else
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{
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var histogram = meter.CreateHistogram<double>(name, unit, description);
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histogram.Record(doubleValue.Value, attributes);
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histogram.Record(0, attributes);
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}
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provider.ForceFlush();
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var batch = new Batch<Metric>(metrics.ToArray(), metrics.Count);
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var request = new OtlpCollector.ExportMetricsServiceRequest();
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request.AddMetrics(ResourceBuilder.CreateEmpty().Build().ToOtlpResource(), batch);
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var resourceMetric = request.ResourceMetrics.Single();
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var scopeMetrics = resourceMetric.ScopeMetrics.Single();
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var actual = scopeMetrics.Metrics.Single();
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Assert.Equal(name, actual.Name);
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Assert.Equal(description ?? string.Empty, actual.Description);
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Assert.Equal(unit ?? string.Empty, actual.Unit);
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Assert.Equal(OtlpMetrics.Metric.DataOneofCase.ExponentialHistogram, actual.DataCase);
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Assert.Null(actual.Gauge);
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Assert.Null(actual.Sum);
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Assert.Null(actual.Histogram);
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Assert.NotNull(actual.ExponentialHistogram);
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Assert.Null(actual.Summary);
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var otlpAggregationTemporality = aggregationTemporality == MetricReaderTemporalityPreference.Cumulative
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? OtlpMetrics.AggregationTemporality.Cumulative
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: OtlpMetrics.AggregationTemporality.Delta;
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Assert.Equal(otlpAggregationTemporality, actual.ExponentialHistogram.AggregationTemporality);
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Assert.Single(actual.ExponentialHistogram.DataPoints);
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var dataPoint = actual.ExponentialHistogram.DataPoints.First();
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Assert.True(dataPoint.StartTimeUnixNano > 0);
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Assert.True(dataPoint.TimeUnixNano > 0);
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Assert.Equal(20, dataPoint.Scale);
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Assert.Equal(1UL, dataPoint.ZeroCount);
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if (longValue > 0 || doubleValue > 0)
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{
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Assert.Equal(2UL, dataPoint.Count);
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}
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else
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{
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Assert.Equal(1UL, dataPoint.Count);
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}
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if (longValue.HasValue)
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{
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if (longValue > 0)
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{
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Assert.Equal((double)longValue, dataPoint.Sum);
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Assert.Null(dataPoint.Negative);
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Assert.True(dataPoint.Positive.Offset > 0);
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Assert.Equal(1UL, dataPoint.Positive.BucketCounts[0]);
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}
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else
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{
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Assert.Equal(0, dataPoint.Sum);
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Assert.Null(dataPoint.Negative);
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Assert.True(dataPoint.Positive.Offset == 0);
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Assert.Empty(dataPoint.Positive.BucketCounts);
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}
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}
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else
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{
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if (doubleValue > 0)
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{
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Assert.Equal(doubleValue, dataPoint.Sum);
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Assert.Null(dataPoint.Negative);
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Assert.True(dataPoint.Positive.Offset > 0);
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Assert.Equal(1UL, dataPoint.Positive.BucketCounts[0]);
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}
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else
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{
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Assert.Equal(0, dataPoint.Sum);
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Assert.Null(dataPoint.Negative);
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Assert.True(dataPoint.Positive.Offset == 0);
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Assert.Empty(dataPoint.Positive.BucketCounts);
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}
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}
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if (attributes.Length > 0)
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{
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OtlpTestHelpers.AssertOtlpAttributes(attributes, dataPoint.Attributes);
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}
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else
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{
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Assert.Empty(dataPoint.Attributes);
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}
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Assert.Empty(dataPoint.Exemplars);
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}
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[Theory]
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[InlineData("test_histogram", null, null, 123L, null, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_histogram", null, null, null, 123.45, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_histogram", null, null, -123L, null, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_histogram", null, null, null, -123.45, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_histogram", null, null, 123L, null, MetricReaderTemporalityPreference.Delta)]
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[InlineData("test_histogram", "description", "unit", 123L, null, MetricReaderTemporalityPreference.Cumulative)]
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[InlineData("test_histogram", null, null, 123L, null, MetricReaderTemporalityPreference.Delta, "key1", "value1", "key2", 123)]
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public void TestHistogramToOtlpMetric(string name, string description, string unit, long? longValue, double? doubleValue, MetricReaderTemporalityPreference aggregationTemporality, params object[] keysValues)
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{
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var metrics = new List<Metric>();
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using var meter = new Meter(Utils.GetCurrentMethodName());
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using var provider = Sdk.CreateMeterProviderBuilder()
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.AddMeter(meter.Name)
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.AddInMemoryExporter(metrics, metricReaderOptions =>
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{
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metricReaderOptions.TemporalityPreference = aggregationTemporality;
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})
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.Build();
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var attributes = ToAttributes(keysValues).ToArray();
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if (longValue.HasValue)
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{
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var histogram = meter.CreateHistogram<long>(name, unit, description);
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histogram.Record(longValue.Value, attributes);
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}
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else
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{
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var histogram = meter.CreateHistogram<double>(name, unit, description);
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histogram.Record(doubleValue.Value, attributes);
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}
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provider.ForceFlush();
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var batch = new Batch<Metric>(metrics.ToArray(), metrics.Count);
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var request = new OtlpCollector.ExportMetricsServiceRequest();
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request.AddMetrics(ResourceBuilder.CreateEmpty().Build().ToOtlpResource(), batch);
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var resourceMetric = request.ResourceMetrics.Single();
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var scopeMetrics = resourceMetric.ScopeMetrics.Single();
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var actual = scopeMetrics.Metrics.Single();
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Assert.Equal(name, actual.Name);
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Assert.Equal(description ?? string.Empty, actual.Description);
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Assert.Equal(unit ?? string.Empty, actual.Unit);
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Assert.Equal(OtlpMetrics.Metric.DataOneofCase.Histogram, actual.DataCase);
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Assert.Null(actual.Gauge);
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Assert.Null(actual.Sum);
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Assert.NotNull(actual.Histogram);
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Assert.Null(actual.ExponentialHistogram);
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Assert.Null(actual.Summary);
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var otlpAggregationTemporality = aggregationTemporality == MetricReaderTemporalityPreference.Cumulative
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? OtlpMetrics.AggregationTemporality.Cumulative
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: OtlpMetrics.AggregationTemporality.Delta;
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Assert.Equal(otlpAggregationTemporality, actual.Histogram.AggregationTemporality);
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Assert.Single(actual.Histogram.DataPoints);
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var dataPoint = actual.Histogram.DataPoints.First();
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Assert.True(dataPoint.StartTimeUnixNano > 0);
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Assert.True(dataPoint.TimeUnixNano > 0);
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Assert.Equal(1UL, dataPoint.Count);
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// Known issue: Negative measurements affect the Sum. Per the spec, they should not.
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if (longValue.HasValue)
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{
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Assert.Equal((double)longValue, dataPoint.Sum);
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}
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else
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{
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Assert.Equal(doubleValue, dataPoint.Sum);
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}
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int bucketIndex;
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for (bucketIndex = 0; bucketIndex < dataPoint.ExplicitBounds.Count; ++bucketIndex)
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{
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if (dataPoint.Sum <= dataPoint.ExplicitBounds[bucketIndex])
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{
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break;
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}
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Assert.Equal(0UL, dataPoint.BucketCounts[bucketIndex]);
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}
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Assert.Equal(1UL, dataPoint.BucketCounts[bucketIndex]);
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if (attributes.Length > 0)
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{
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OtlpTestHelpers.AssertOtlpAttributes(attributes, dataPoint.Attributes);
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}
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else
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{
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Assert.Empty(dataPoint.Attributes);
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}
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Assert.Empty(dataPoint.Exemplars);
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}
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private static IEnumerable<KeyValuePair<string, object>> ToAttributes(object[] keysValues)
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{
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var keys = keysValues?.Where((_, index) => index % 2 == 0).ToArray();
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var values = keysValues?.Where((_, index) => index % 2 != 0).ToArray();
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for (var i = 0; keys != null && i < keys.Length; ++i)
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{
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yield return new KeyValuePair<string, object>(keys[i].ToString(), values[i]);
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}
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}
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}
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}
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