Fix tests

Derive the right path for the test application now that the test binary is in a different location.

Author: martincostello

test/OpenTelemetry.Instrumentation.AspNetCore.Tests/OpenTelemetry.Instrumentation.AspNetCore.Tests.csproj

@@ -40,4 +40,8 @@
     </EmbeddedResource>
   </ItemGroup>
 
+  <ItemGroup>
+    <AssemblyMetadata Include="RouteTestsPath" Value="$([System.IO.Path]::GetFullPath('$(MSBuildThisFileDirectory)/RouteTests'))" />
+  </ItemGroup>
+
 </Project>

test/OpenTelemetry.Instrumentation.AspNetCore.Tests/RouteTests/RoutingTestFixture.cs

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 using System.Globalization;
+using System.Reflection;
 using System.Text;
 using Microsoft.AspNetCore.Builder;
 using RouteTests.TestApplication;
@@ -90,8 +91,14 @@ private void GenerateReadme()
             sb.AppendLine("```");
         }
 
+        string routeTestsPath =
+            typeof(TestApplicationFactory).Assembly
+            .GetCustomAttributes()
+            .OfType<AssemblyMetadataAttribute>()
+            .FirstOrDefault((p) => p.Key is "RouteTestsPath")?.Value ?? ".";
+
         var readmeFileName = $"README.net{Environment.Version.Major}.0.md";
-        File.WriteAllText(Path.Combine("..", "..", "..", "RouteTests", readmeFileName), sb.ToString());
+        File.WriteAllText(Path.Combine(routeTestsPath, readmeFileName), sb.ToString());
 
         // Generates a link fragment that should comply with markdownlint rule MD051
         // https://github.com/DavidAnson/markdownlint/blob/main/doc/md051.md
@@ -101,8 +108,7 @@ static string GenerateLinkFragment(TestApplicationScenario scenario, string name
                 .Where(c => (!char.IsPunctuation(c) && c != '`') || c == '-')
                 .Select(c => c switch
                 {
-                    '-' => '-',
-                    ' ' => '-',
+                    '-' or ' ' => '-',
                     _ => char.ToLower(c, CultureInfo.InvariantCulture),
                 })
                 .ToArray();

test/OpenTelemetry.Instrumentation.AspNetCore.Tests/RouteTests/TestApplication/TestApplicationFactory.cs

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 using System.Diagnostics;
+using System.Reflection;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Diagnostics;
 using Microsoft.AspNetCore.Http;
@@ -41,8 +42,13 @@ public enum TestApplicationScenario
 
 internal class TestApplicationFactory
 {
-    private static readonly string AspNetCoreTestsPath = new FileInfo(typeof(RoutingTests)!.Assembly!.Location)!.Directory!.Parent!.Parent!.Parent!.FullName;
-    private static readonly string ContentRootPath = Path.Combine(AspNetCoreTestsPath, "RouteTests", "TestApplication");
+    private static readonly string RouteTestsPath =
+        typeof(TestApplicationFactory).Assembly
+        .GetCustomAttributes()
+        .OfType<AssemblyMetadataAttribute>()
+        .FirstOrDefault((p) => p.Key is "RouteTestsPath")?.Value ?? ".";
+
+    private static readonly string ContentRootPath = Path.Combine(RouteTestsPath, "TestApplication");
 
     public static WebApplication? CreateApplication(TestApplicationScenario config)
     {