133 lines
4.8 KiB
C#
133 lines
4.8 KiB
C#
// <copyright file="MetricTests.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;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Mvc.Testing;
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using OpenTelemetry.Metrics;
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using OpenTelemetry.Trace;
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using Xunit;
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namespace OpenTelemetry.Instrumentation.AspNetCore.Tests
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{
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public class MetricTests
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: IClassFixture<WebApplicationFactory<Program>>, IDisposable
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{
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private readonly WebApplicationFactory<Program> factory;
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private MeterProvider meterProvider = null;
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public MetricTests(WebApplicationFactory<Program> factory)
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{
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this.factory = factory;
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}
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[Fact]
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public void AddAspNetCoreInstrumentation_BadArgs()
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{
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MeterProviderBuilder builder = null;
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Assert.Throws<ArgumentNullException>(() => builder.AddAspNetCoreInstrumentation());
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}
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[Fact]
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public async Task RequestMetricIsCaptured()
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{
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var metricItems = new List<Metric>();
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this.meterProvider = Sdk.CreateMeterProviderBuilder()
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.AddAspNetCoreInstrumentation()
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.AddInMemoryExporter(metricItems)
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.Build();
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using (var client = this.factory.CreateClient())
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{
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var response = await client.GetAsync("/api/values");
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response.EnsureSuccessStatusCode();
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}
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// We need to let End callback execute as it is executed AFTER response was returned.
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// In unit tests environment there may be a lot of parallel unit tests executed, so
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// giving some breezing room for the End callback to complete
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await Task.Delay(TimeSpan.FromSeconds(1));
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this.meterProvider.Dispose();
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var requestMetrics = metricItems
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.Where(item => item.Name == "http.server.duration")
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.ToArray();
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Assert.True(requestMetrics.Length == 1);
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var metric = requestMetrics[0];
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Assert.NotNull(metric);
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Assert.True(metric.MetricType == MetricType.Histogram);
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var metricPoints = new List<MetricPoint>();
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foreach (var p in metric.GetMetricPoints())
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{
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metricPoints.Add(p);
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}
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Assert.Single(metricPoints);
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var metricPoint = metricPoints[0];
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var count = metricPoint.GetHistogramCount();
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var sum = metricPoint.GetHistogramSum();
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Assert.Equal(1L, count);
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Assert.True(sum > 0);
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/*
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var bucket = metric.Buckets
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.Where(b =>
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metric.PopulationSum > b.LowBoundary &&
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metric.PopulationSum <= b.HighBoundary)
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.FirstOrDefault();
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Assert.NotEqual(default, bucket);
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Assert.Equal(1, bucket.Count);
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*/
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var attributes = new KeyValuePair<string, object>[metricPoint.Tags.Count];
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int i = 0;
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foreach (var tag in metricPoint.Tags)
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{
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attributes[i++] = tag;
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}
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var method = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpMethod, "GET");
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var scheme = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpScheme, "http");
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var statusCode = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpStatusCode, "200");
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var flavor = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpFlavor, "1.1");
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var host = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpHost, "localhost");
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var target = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpTarget, "api/Values");
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Assert.Contains(method, attributes);
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Assert.Contains(scheme, attributes);
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Assert.Contains(statusCode, attributes);
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Assert.Contains(flavor, attributes);
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Assert.Contains(host, attributes);
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Assert.Contains(target, attributes);
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Assert.Equal(6, attributes.Length);
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}
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public void Dispose()
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{
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this.meterProvider?.Dispose();
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GC.SuppressFinalize(this);
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}
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}
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}
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