97 lines
3.3 KiB
C#
97 lines
3.3 KiB
C#
// <copyright file="PrometheusExporterMiddlewareTests.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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#if !NET461
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.Metrics;
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using System.Net;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Builder;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.AspNetCore.TestHost;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Hosting;
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using OpenTelemetry.Metrics;
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using OpenTelemetry.Tests;
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using Xunit;
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namespace OpenTelemetry.Exporter.Prometheus.Tests
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{
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public sealed class PrometheusExporterMiddlewareTests
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{
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private static readonly string MeterName = Utils.GetCurrentMethodName();
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[Fact]
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public async Task PrometheusExporterMiddlewareIntegration()
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{
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var host = await new HostBuilder()
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.ConfigureWebHost(webBuilder => webBuilder
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.UseTestServer()
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.UseStartup<Startup>())
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.StartAsync();
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var tags = new KeyValuePair<string, object>[]
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{
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new KeyValuePair<string, object>("key1", "value1"),
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new KeyValuePair<string, object>("key2", "value2"),
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};
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using var meter = new Meter(MeterName);
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var counter = meter.CreateCounter<double>("counter_double");
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counter.Add(100.18D, tags);
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counter.Add(0.99D, tags);
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using var response = await host.GetTestClient().GetAsync("/metrics").ConfigureAwait(false);
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Assert.Equal(HttpStatusCode.OK, response.StatusCode);
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string content = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
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int index = content.LastIndexOf(' ');
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Assert.Equal(
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$"# TYPE counter_double counter\ncounter_double{{key1=\"value1\",key2=\"value2\"}} 101.17",
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content.Substring(0, index));
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await host.StopAsync().ConfigureAwait(false);
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}
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public class Startup
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{
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public void ConfigureServices(IServiceCollection services)
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{
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services.AddOpenTelemetryMetrics(builder => builder
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.AddMeter(MeterName)
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.AddPrometheusExporter(o =>
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{
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if (o.StartHttpListener)
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{
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throw new InvalidOperationException("StartHttpListener should be false on .NET Core 3.1+.");
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}
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}));
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}
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public void Configure(IApplicationBuilder app)
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{
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app.UseOpenTelemetryPrometheusScrapingEndpoint();
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}
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}
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}
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}
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#endif
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