Move test infra to .NET Core 3.0 (#403)

* Add W3C TraceContext validation test app

* fix linux build

* some fixes

* Use ASP.NET Core test app as W3C test suite example

* broken solution

* remove new project

* move tests to 3.0

* update minver

* fix http tests to force 2.0

* minver is in common props, remove from projects

* move lightstep tests to 3.1

.vsts/ci-build.yml

@@ -1,7 +1,7 @@
 # CI build. No publioshing of artifacts
 
 variables:
-  DotNetVersion: "2.2.101"
+  DotNetVersion: "3.1.100"
 
 # A pipeline with no CI trigger
 trigger: none

.vsts/ci-myget-update.yml

@@ -1,7 +1,7 @@
 # CI build with the upload to MyGet
 
 variables:
-  DotNetVersion: "2.2.101"
+  DotNetVersion: "3.1.100"
 
 trigger:
   branches:

CONTRIBUTING.md

@@ -49,7 +49,7 @@ You can contribute to this project from a Windows, macOS or Linux machine. Requi
 In all platforms, the requirements are:
 
 * Git client and command line tools. You may use Visual Studio to clone the repo, but we use [SourceLink](https://github.com/dotnet/sourcelink) to build and it needs git.
-* .NET Core 2.1+
+* .NET Core 3.1+
 
 #### Windows
 
@@ -67,7 +67,7 @@ This is because unit tests targeting .NET Framework (i.e: `net46`) are disabled
 
 Open `OpenTelemetry.sln` in your IDE of choice and follow normal development process.
 
-To build from the command line you need `dotnet` version `2.1+`.
+To build from the command line you need `dotnet` version `3.1+`.
 
 ``` sh
 dotnet build OpenTelemetry.sln
@@ -79,7 +79,7 @@ You can use any of the IDEs mentioned above to test your contribution. Open root
 folder or `OpenTelemetry.sln` in your editor and follow normal development
 process.
 
-To test from command line you need `dotnet` version `2.0+`.
+To test from command line you need `dotnet` version `3.1+`.
 
 ``` sh
 dotnet test OpenTelemetry.sln

OpenTelemetry.proj

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="15.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="16.4" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <ItemGroup>
      <Solution Include="OpenTelemetry.sln" />    

OpenTelemetry.sln

@@ -54,7 +54,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenTelemetry.Collector.Asp
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "testdata", "testdata", "{77C7929A-2EED-4AA6-8705-B5C443C8AA0F}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TestApp.AspNetCore.2.0", "test\TestApp.AspNetCore.2.0\TestApp.AspNetCore.2.0.csproj", "{F2F81E76-6A0E-466B-B673-EBBF1A9ED075}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TestApp.AspNetCore.3.0", "test\TestApp.AspNetCore.3.0\TestApp.AspNetCore.3.0.csproj", "{F2F81E76-6A0E-466B-B673-EBBF1A9ED075}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenTelemetry.Exporter.Stackdriver.Tests", "test\OpenTelemetry.Exporter.Stackdriver.Tests\OpenTelemetry.Exporter.Stackdriver.Tests.csproj", "{6875032B-DFDC-4CDE-A283-37CA7F99926A}"
 EndProject
@@ -105,7 +105,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenTelemetry.Hosting.Tests
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenTelemetry.Exporter.OpenTelemetryProtocol", "src\OpenTelemetry.Exporter.OpenTelemetryProtocol\OpenTelemetry.Exporter.OpenTelemetryProtocol.csproj", "{A38AC295-2745-4B85-8B6B-DCA864CEDD5B}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenTelemetry.Exporter.Prometheus.Tests", "test\OpenTelemetry.Exporter.Prometheus.Tests\OpenTelemetry.Exporter.Prometheus.Tests.csproj", "{393128EC-454D-45E8-A204-EC54904E5B3F}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenTelemetry.Exporter.Prometheus.Tests", "test\OpenTelemetry.Exporter.Prometheus.Tests\OpenTelemetry.Exporter.Prometheus.Tests.csproj", "{393128EC-454D-45E8-A204-EC54904E5B3F}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

benchmarks/Benchmarks.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>netcoreapp2.2;net462</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1;net462</TargetFrameworks>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 

build/Common.prod.props

@@ -2,7 +2,7 @@
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <ItemGroup>
-    <PackageReference Include="MinVer" Version="1.1.0">
+    <PackageReference Include="MinVer" Version="2.0.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>

samples/Exporters/Exporters.csproj

@@ -3,7 +3,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
@@ -27,5 +27,4 @@
     <ProjectReference Include="..\..\src\OpenTelemetry.Exporter.ApplicationInsights\OpenTelemetry.Exporter.ApplicationInsights.csproj" />
     <ProjectReference Include="..\..\src\OpenTelemetry.Exporter.Jaeger\OpenTelemetry.Exporter.Jaeger.csproj" />
   </ItemGroup>
-
 </Project>

src/OpenTelemetry.Api/OpenTelemetry.Api.csproj

@@ -21,4 +21,5 @@
   <ItemGroup>
     <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="4.6.0" />
   </ItemGroup>
+
 </Project>

src/OpenTelemetry.Collector.AspNetCore/AspNetCoreCollector.cs

@@ -42,7 +42,7 @@ namespace OpenTelemetry.Collector.AspNetCore
         /// <param name="options">Configuration options for dependencies collector.</param>
         public AspNetCoreCollector(Tracer tracer, AspNetCoreCollectorOptions options)
         {
-            this.diagnosticSourceSubscriber = new DiagnosticSourceSubscriber(new HttpInListener("Microsoft.AspNetCore", tracer), options.EventFilter);
+            this.diagnosticSourceSubscriber = new DiagnosticSourceSubscriber(new HttpInListener("Microsoft.AspNetCore", tracer, options.RequestFilter), null);
             this.diagnosticSourceSubscriber.Subscribe();
         }
 

src/OpenTelemetry.Collector.AspNetCore/AspNetCoreCollectorOptions.cs

@@ -13,7 +13,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 // </copyright>
+
 using System;
+using Microsoft.AspNetCore.Http;
 
 namespace OpenTelemetry.Collector.AspNetCore
 {
@@ -25,9 +27,9 @@ namespace OpenTelemetry.Collector.AspNetCore
         /// <summary>
         /// Gets or sets a hook to exclude calls based on domain or other per-request criterion.
         /// </summary>
-        internal Func<string, object, object, bool> EventFilter { get; set; } = DefaultFilter;
+        internal Predicate<HttpContext> RequestFilter { get; set; } = DefaultFilter;
 
-        private static bool DefaultFilter(string activityName, object arg1, object unused)
+        private static bool DefaultFilter(HttpContext httpContext)
         {
             return true;
         }

src/OpenTelemetry.Collector.AspNetCore/Implementation/HttpInListener.cs

@@ -14,6 +14,7 @@
 // limitations under the License.
 // </copyright>
 
+using System;
 using System.Diagnostics;
 using System.Linq;
 using System.Text;
@@ -32,11 +33,13 @@ namespace OpenTelemetry.Collector.AspNetCore.Implementation
         private readonly PropertyFetcher beforeActionAttributeRouteInfoFetcher = new PropertyFetcher("AttributeRouteInfo");
         private readonly PropertyFetcher beforeActionTemplateFetcher = new PropertyFetcher("Template");
         private readonly bool hostingSupportsW3C = false;
+        private readonly Predicate<HttpContext> requestFilter;
 
-        public HttpInListener(string name, Tracer tracer)
+        public HttpInListener(string name, Tracer tracer, Predicate<HttpContext> requestFilter)
             : base(name, tracer)
         {
             this.hostingSupportsW3C = typeof(HttpRequest).Assembly.GetName().Version.Major >= 3;
+            this.requestFilter = requestFilter;
         }
 
         public override void OnStartActivity(Activity activity, object payload)
@@ -50,6 +53,12 @@ namespace OpenTelemetry.Collector.AspNetCore.Implementation
                 return;
             }
 
+            if (this.requestFilter != null && !this.requestFilter(context))
+            {
+                CollectorEventSource.Log.RequestIsFilteredOut(activity.OperationName);
+                return;
+            }
+
             var request = context.Request;
 
             // see the spec https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/data-semantic-conventions.md

src/OpenTelemetry.Collector.AspNetCore/OpenTelemetry.Collector.AspNetCore.csproj

@@ -10,4 +10,11 @@
     <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Http.Features" Version="2.0.0" />
   </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Update="MinVer" Version="2.0.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
 </Project>

src/OpenTelemetry.Collector.Dependencies/OpenTelemetry.Collector.Dependencies.csproj

@@ -12,4 +12,5 @@
   <ItemGroup Condition="'$(TargetFramework)' == 'net46'">
     <Reference Include="System.Net.Http" />
   </ItemGroup>
+
 </Project>

src/OpenTelemetry.Collector.StackExchangeRedis/OpenTelemetry.Collector.StackExchangeRedis.csproj

@@ -9,4 +9,5 @@
     <ProjectReference Include="..\OpenTelemetry\OpenTelemetry.csproj" />
     <PackageReference Include="StackExchange.Redis" Version="2.0.519" />
   </ItemGroup>
+
 </Project>

src/OpenTelemetry.Exporter.ApplicationInsights/OpenTelemetry.Exporter.ApplicationInsights.csproj

@@ -13,4 +13,5 @@
   <ItemGroup>
     <Folder Include="Implementation\" />
   </ItemGroup>
+
 </Project>

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OpenTelemetry.Exporter.OpenTelemetryProtocol.csproj

@@ -17,4 +17,5 @@
       <ProtoRoot>Implementation</ProtoRoot>
     </Protobuf>
   </ItemGroup>
+
 </Project>

src/OpenTelemetry.Exporter.Prometheus/OpenTelemetry.Exporter.Prometheus.csproj

@@ -8,4 +8,5 @@
   <ItemGroup>
     <ProjectReference Include="..\OpenTelemetry\OpenTelemetry.csproj" />
   </ItemGroup>
+
 </Project>

src/OpenTelemetry.Exporter.Stackdriver/OpenTelemetry.Exporter.Stackdriver.csproj

@@ -18,4 +18,5 @@
   <ItemGroup>
     <ProjectReference Include="..\OpenTelemetry\OpenTelemetry.csproj" />
   </ItemGroup>
+
 </Project>

src/OpenTelemetry.Exporter.Zipkin/OpenTelemetry.Exporter.Zipkin.csproj

@@ -13,4 +13,5 @@
   <ItemGroup Condition="'$(TargetFramework)' == 'net46'">
     <Reference Include="System.Net.Http" />
   </ItemGroup>
+
 </Project>

src/OpenTelemetry.Hosting/OpenTelemetry.Hosting.csproj

@@ -9,4 +9,5 @@
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="2.1.0" />
     <ProjectReference Include="..\OpenTelemetry\OpenTelemetry.csproj" />
   </ItemGroup>
+
 </Project>

src/OpenTelemetry.Shims.OpenTracing/OpenTelemetry.Shims.OpenTracing.csproj

@@ -20,4 +20,5 @@
   <ItemGroup>
     <ProjectReference Include="..\OpenTelemetry.Api\OpenTelemetry.Api.csproj" />
   </ItemGroup>
+
 </Project>

src/OpenTelemetry/Collector/CollectorEventSource.cs

@@ -1,4 +1,4 @@
-// <copyright file="CollectorEventSource.cs" company="OpenTelemetry Authors">
+// <copyright file="CollectorEventSource.cs" company="OpenTelemetry Authors">
 // Copyright 2018, OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -79,6 +79,12 @@ namespace OpenTelemetry.Collector
             this.WriteEvent(5, eventName);
         }
 
+        [Event(6, Message = "Request is filtered out.", Level = EventLevel.Verbose)]
+        public void RequestIsFilteredOut(string eventName)
+        {
+            this.WriteEvent(6, eventName);
+        }
+
         /// <summary>
         /// Returns a culture-independent string representation of the given <paramref name="exception"/> object,
         /// appropriate for diagnostics tracing.

src/OpenTelemetry/Collector/ListenerHandler.cs

@@ -50,9 +50,6 @@ namespace OpenTelemetry.Collector
 
         public virtual void OnException(Activity activity, object payload)
         {
-            var span = this.Tracer.CurrentSpan;
-
-            // TODO: gather exception information
         }
 
         public virtual void OnCustom(string name, Activity activity, object payload)

test/OpenTelemetry.Collector.AspNetCore.Tests/BasicTests.cs

@@ -17,7 +17,6 @@
 using OpenTelemetry.Trace.Configuration;
 using Xunit;
 using Microsoft.AspNetCore.Mvc.Testing;
-using TestApp.AspNetCore._2._0;
 using System.Threading.Tasks;
 using Microsoft.Extensions.DependencyInjection;
 using OpenTelemetry.Trace;
@@ -26,11 +25,10 @@ using Moq;
 using Microsoft.AspNetCore.TestHost;
 using System;
 using System.Threading;
-using OpenTelemetry.Context.Propagation;
-using Microsoft.AspNetCore.Http;
-using System.Collections.Generic;
 using System.Diagnostics;
+using System.Net.Http;
 using OpenTelemetry.Trace.Samplers;
+using TestApp.AspNetCore._3._0;
 
 namespace OpenTelemetry.Collector.AspNetCore.Tests
 {
@@ -98,13 +96,6 @@ namespace OpenTelemetry.Collector.AspNetCore.Tests
             var expectedTraceId = ActivityTraceId.CreateRandom();
             var expectedSpanId = ActivitySpanId.CreateRandom();
 
-            var tf = new Mock<ITextFormat>();
-            tf.Setup(m => m.Extract<HttpRequest>(It.IsAny<HttpRequest>(), It.IsAny<Func<HttpRequest, string, IEnumerable<string>>>())).Returns(new SpanContext(
-                expectedTraceId,
-                expectedSpanId,
-                ActivityTraceFlags.Recorded,
-                true));
-
             // Arrange
             using (var testFactory = this.factory
                 .WithWebHostBuilder(builder =>
@@ -112,15 +103,16 @@ namespace OpenTelemetry.Collector.AspNetCore.Tests
                     {
                         services.AddSingleton<TracerFactory>(_ =>
                             TracerFactory.Create(b => b
-                                .SetSampler(new AlwaysSampleSampler())
-                                .SetTextFormat(tf.Object)
                                 .AddProcessorPipeline(p => p.AddProcessor(n => spanProcessor.Object))
                                 .AddRequestCollector()));
                     })))
             using (var client = testFactory.CreateClient())
             {
+                var request = new HttpRequestMessage(HttpMethod.Get, "/api/values/2");
+                request.Headers.Add("traceparent", $"00-{expectedTraceId}-{expectedSpanId}-01");
+
                 // Act
-                var response = await client.GetAsync("/api/values/2");
+                var response = await client.SendAsync(request);
 
                 // Assert
                 response.EnsureSuccessStatusCode(); // Status Code 200-299
@@ -142,27 +134,14 @@ namespace OpenTelemetry.Collector.AspNetCore.Tests
         [Fact]
         public async Task FilterOutRequest()
         {
-            bool Filter(string eventName, object arg1, object _)
-            {
-                if (eventName == "Microsoft.AspNetCore.Hosting.HttpRequestIn" &&
-                    arg1 is HttpContext context &&
-                    context.Request.Path == "/api/values/2")
-                {
-                    return false;
-                }
-
-                return true;
-            }
-
             var spanProcessor = new Mock<SpanProcessor>();
 
             void ConfigureTestServices(IServiceCollection services)
             {
                 services.AddSingleton<TracerFactory>(_ =>
                     TracerFactory.Create(b => b
-                        .SetSampler(new AlwaysSampleSampler())
                         .AddProcessorPipeline(p => p.AddProcessor(n => spanProcessor.Object))
-                        .AddRequestCollector(o => o.EventFilter = Filter)));
+                        .AddRequestCollector(o => o.RequestFilter = (httpContext) => httpContext.Request.Path != "/api/values/2")));
             }
 
             // Arrange

test/OpenTelemetry.Collector.AspNetCore.Tests/IncomingRequestsCollectionsIsAccordingToTheSpecTests.cs

@@ -17,7 +17,6 @@
 using OpenTelemetry.Trace.Configuration;
 using Xunit;
 using Microsoft.AspNetCore.Mvc.Testing;
-using TestApp.AspNetCore._2._0;
 using System.Threading.Tasks;
 using Microsoft.Extensions.DependencyInjection;
 using OpenTelemetry.Trace;
@@ -26,7 +25,7 @@ using Moq;
 using Microsoft.AspNetCore.TestHost;
 using System;
 using Microsoft.AspNetCore.Http;
-using OpenTelemetry.Trace.Samplers;
+using TestApp.AspNetCore._3._0;
 
 namespace OpenTelemetry.Collector.AspNetCore.Tests
 {
@@ -65,7 +64,6 @@ namespace OpenTelemetry.Collector.AspNetCore.Tests
                         services.AddSingleton<CallbackMiddleware.CallbackMiddlewareImpl>(new TestCallbackMiddlewareImpl());
                         services.AddSingleton<TracerFactory>(_ =>
                             TracerFactory.Create(b => b
-                                .SetSampler(new AlwaysSampleSampler())
                                 .AddProcessorPipeline(p => p.AddProcessor(e => spanProcessor.Object))
                                 .AddRequestCollector()));
                     }))

test/OpenTelemetry.Collector.AspNetCore.Tests/OpenTelemetry.Collector.AspNetCore.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Unit test project for OpenTelemetry</Description>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
@@ -28,9 +28,8 @@
   <ItemGroup>
     <ProjectReference Include="..\..\src\OpenTelemetry.Collector.AspNetCore\OpenTelemetry.Collector.AspNetCore.csproj" />
     <ProjectReference Include="..\..\src\OpenTelemetry\OpenTelemetry.csproj" />
-    <ProjectReference Include="..\TestApp.AspNetCore.2.0\TestApp.AspNetCore.2.0.csproj" />
-    <PackageReference Include="Microsoft.AspNetCore.App" />
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="2.1.2" />
+    <ProjectReference Include="..\TestApp.AspNetCore.3.0\TestApp.AspNetCore.3.0.csproj" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="3.0.0" />
   </ItemGroup>
 
   <ItemGroup>

test/OpenTelemetry.Collector.Dependencies.Tests/HttpClientTests.cs

@@ -110,6 +110,7 @@ namespace OpenTelemetry.Collector.Dependencies.Tests
                         {
                             RequestUri = new Uri(tc.Url),
                             Method = new HttpMethod(tc.Method),
+                            Version = new Version(2, 0),
                         };
 
                         if (tc.Headers != null)

test/OpenTelemetry.Collector.Dependencies.Tests/OpenTelemetry.Collector.Dependencies.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Unit test project for OpenTelemetry</Description>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>

test/OpenTelemetry.Collector.StackExchangeRedis.Tests/OpenTelemetry.Collector.StackExchangeRedis.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Unit test project for ApplicationInsights Exporter for OpenTelemetry</Description>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
     <TargetFrameworks Condition="$(OS) == 'Windows_NT'">$(TargetFrameworks);net461</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>

test/OpenTelemetry.Exporter.ApplicationInsights.Tests/OpenTelemetry.Exporter.ApplicationInsights.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Unit test project for ApplicationInsights Exporter for OpenTelemetry</Description>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
     <TargetFrameworks Condition="$(OS) == 'Windows_NT'">$(TargetFrameworks);net46</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>

test/OpenTelemetry.Exporter.Jaeger.Tests/OpenTelemetry.Exporter.Jaeger.Tests.csproj

@@ -1,7 +1,7 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Unit test project for Jaeger Exporter for OpenTelemetry</Description>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
     <TargetFrameworks Condition="$(OS) == 'Windows_NT'">$(TargetFrameworks);net46</TargetFrameworks>
     <IsPackable>false</IsPackable>
   </PropertyGroup>

test/OpenTelemetry.Exporter.LightStep.Tests/OpenTelemetry.Exporter.LightStep.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>netcoreapp2.2</TargetFramework>
+        <TargetFramework>netcoreapp3.1</TargetFramework>
 
         <IsPackable>false</IsPackable>
     </PropertyGroup>

test/OpenTelemetry.Exporter.Prometheus.Tests/OpenTelemetry.Exporter.Prometheus.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 

test/OpenTelemetry.Exporter.Stackdriver.Tests/OpenTelemetry.Exporter.Stackdriver.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Unit test project for Stackdriver Exporter for OpenTelemetry</Description>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
     <TargetFrameworks Condition="$(OS) == 'Windows_NT'">$(TargetFrameworks);net46</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>

test/OpenTelemetry.Hosting.Tests/OpenTelemetry.Hosting.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Unit test project for ApplicationInsights Exporter for OpenTelemetry</Description>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
     <TargetFrameworks Condition="$(OS) == 'Windows_NT'">$(TargetFrameworks);net461</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>

test/OpenTelemetry.Shims.OpenTracing.Tests/OpenTelemetry.Shims.OpenTracing.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Unit test project for OpenTelemetry.Shims.OpenTracing</Description>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>

test/OpenTelemetry.Tests/OpenTelemetry.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Unit test project for OpenTelemetry</Description>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
     <TargetFrameworks Condition="$(OS) == 'Windows_NT'">$(TargetFrameworks);net46</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>

test/TestApp.AspNetCore.3.0/CallbackMiddleware.cs

@@ -16,7 +16,7 @@
 using Microsoft.AspNetCore.Http;
 using System.Threading.Tasks;
 
-namespace TestApp.AspNetCore._2._0
+namespace TestApp.AspNetCore._3._0
 {
     public class CallbackMiddleware
     {

test/TestApp.AspNetCore.3.0/Controllers/ForwardController.cs

@@ -19,35 +19,21 @@ using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc;
 using Newtonsoft.Json;
 
-namespace TestApp.AspNetCore._2._0.Controllers
+namespace TestApp.AspNetCore._3._0.Controllers
 {
     [Route("api/[controller]")]
     public class ForwardController : Controller
     {
         private readonly HttpClient httpClient;
-        public ForwardController(HttpClient httpclient)
+
+        public ForwardController(HttpClient httpClient)
         {
-            this.httpClient = httpclient;
+            this.httpClient = httpClient;
         }
 
-        private async Task<string> CallNextAsync(string url, Data[] arguments)
-        {
-            if (url != null)
-            {
-                var request = new HttpRequestMessage(HttpMethod.Post, url)
-                {
-                    Content = new StringContent(JsonConvert.SerializeObject(arguments), Encoding.UTF8, "application/json"),
-                };
-                var response = await httpClient.SendAsync(request);
-                return await response.Content.ReadAsStringAsync();
-            }
-
-            return "all done";
-        }
-
-        // POST api/values
+        // POST api/test
         [HttpPost]
-        public async Task<string> Post([FromBody]Data[] data)
+        public async Task<string> Post([FromBody] Data[] data)
         {
             var result = string.Empty;
 
@@ -55,13 +41,12 @@ namespace TestApp.AspNetCore._2._0.Controllers
             {
                 foreach (var argument in data)
                 {
-                    if (argument.sleep != null)
+                    var request = new HttpRequestMessage(HttpMethod.Post, argument.Url)
                     {
-                        result = "slept for " + argument.sleep.Value + " ms";
-                        await Task.Delay(argument.sleep.Value);
-                    }
-
-                    result += await CallNextAsync(argument.url, argument.arguments);
+                        Content = new StringContent(JsonConvert.SerializeObject(argument.Arguments),
+                            Encoding.UTF8, "application/json"),
+                    };
+                    await this.httpClient.SendAsync(request);
                 }
             }
             else
@@ -75,8 +60,11 @@ namespace TestApp.AspNetCore._2._0.Controllers
 
     public class Data
     {
-        public int? sleep { get; set; }
-        public string url { get; set; }
-        public Data[] arguments { get; set; }
+        [JsonProperty("url")]
+        public string Url { get; set; }
+
+        [JsonProperty("arguments")]
+        public Data[] Arguments { get; set; }
     }
-}
+}
+

test/TestApp.AspNetCore.3.0/Controllers/ValuesController.cs

@@ -16,7 +16,7 @@
 using System.Collections.Generic;
 using Microsoft.AspNetCore.Mvc;
 
-namespace TestApp.AspNetCore._2._0.Controllers
+namespace TestApp.AspNetCore._3._0.Controllers
 {
     [Route("api/[controller]")]
     public class ValuesController : Controller

test/TestApp.AspNetCore.3.0/Program.cs

@@ -17,7 +17,7 @@
 using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Hosting;
 
-namespace TestApp.AspNetCore._2._0
+namespace TestApp.AspNetCore._3._0
 {
     public class Program
     {

test/TestApp.AspNetCore.3.0/README.md

@@ -0,0 +1,8 @@
+This test app is used for ASP.NET Core integration testing by unit tests. You could also manually run W3C test suite.
+
+# Run W3C test suite
+The detailed instruction for the test tool available [here](https://github.com/w3c/trace-context/tree/master/test). 
+
+* Follow it to install prerequisites and get the test code
+* Start this test app with Visual Studio (or `dotnet run`)
+* Run test per instruction using `http://localhost:63741/api/forward` endpoint

test/TestApp.AspNetCore.3.0/Startup.cs

@@ -19,9 +19,11 @@ using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using Microsoft.Extensions.Hosting;
 using OpenTelemetry.Trace.Configuration;
 
-namespace TestApp.AspNetCore._2._0
+namespace TestApp.AspNetCore._3._0
 {
     public class Startup
     {
@@ -39,10 +41,14 @@ namespace TestApp.AspNetCore._2._0
             services.AddSingleton<HttpClient>();
             services.AddSingleton(
                 new CallbackMiddleware.CallbackMiddlewareImpl());
+
+            services.TryAddSingleton<TracerFactory>(_ => TracerFactory.Create(b => b
+                    .AddRequestCollector()
+                    .AddDependencyCollector()));
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
-        public void Configure(IApplicationBuilder app, IHostingEnvironment env, TracerFactory factory)
+        public void Configure(IApplicationBuilder app, IWebHostEnvironment env, TracerFactory factory)
         {
             if (env.IsDevelopment())
             {
@@ -50,7 +56,14 @@ namespace TestApp.AspNetCore._2._0
             }
 
             app.UseMiddleware<CallbackMiddleware>();
-            app.UseMvc();
+            app.UseRouting();
+
+            app.UseAuthorization();
+
+            app.UseEndpoints(endpoints =>
+            {
+                endpoints.MapControllers();
+            });
         }
     }
 }

test/TestApp.AspNetCore.3.0/TestApp.AspNetCore.3.0.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
@@ -11,14 +11,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.All">
-      <PrivateAssets Condition="'%(PackageReference.Version)' == ''">all</PrivateAssets>
-      <Publish Condition="'%(PackageReference.Version)' == ''">true</Publish>
-    </PackageReference>
-  </ItemGroup>
-
-  <ItemGroup>
-    <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.4" />
+      <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.0.0" />
   </ItemGroup>
 
   <ItemGroup>
@@ -26,6 +19,7 @@
     <ProjectReference Include="..\..\src\OpenTelemetry.Collector.AspNetCore\OpenTelemetry.Collector.AspNetCore.csproj" />
     <ProjectReference Include="..\..\src\OpenTelemetry.Collector.Dependencies\OpenTelemetry.Collector.Dependencies.csproj" />
     <ProjectReference Include="..\..\src\OpenTelemetry.Exporter.Zipkin\OpenTelemetry.Exporter.Zipkin.csproj" />
+    <ProjectReference Include="..\..\src\OpenTelemetry.Hosting\OpenTelemetry.Hosting.csproj" />
     <ProjectReference Include="..\..\src\OpenTelemetry\OpenTelemetry.csproj" />
   </ItemGroup>