Updated test traits

Author: TalAloni

StandardSocketsHttpHandler.FunctionalTests/HttpClientHandlerTest.Proxy.cs

@@ -24,6 +24,7 @@ public HttpClientHandler_Proxy_Test(ITestOutputHelper output)
             _output = output;
         }
 
+        [Trait("Category", "WindowsAuthentication")]
         [OuterLoop("Uses external server")]
         [Theory]
         [InlineData(AuthenticationSchemes.Ntlm, true, false)]

StandardSocketsHttpHandler.FunctionalTests/HttpClientHandlerTest.ServerCertificates.cs

@@ -72,6 +72,7 @@ public async Task NoCallback_ValidCertificate_SuccessAndExpectedPropertyBehavior
             }
         }
 
+        [ActiveIssue(27629)] // https://github.com/dotnet/runtime/issues/27629
         [SkipOnTargetFramework(TargetFrameworkMonikers.Uap, "UAP won't send requests through a custom proxy")]
         [OuterLoop] // TODO: Issue #11345
         [Fact]
@@ -437,6 +438,7 @@ public async Task SSLBackendNotSupported_Revocation_ThrowsPlatformNotSupportedEx
             }
         }
 
+        [SkipOnTargetFramework(TargetFrameworkMonikers.NetFramework, "Backport issue")] // Not working on .NET Framework, probably related to HttpContent.CopyToAsync
         [OuterLoop] // TODO: Issue #11345
         [PlatformSpecific(TestPlatforms.Windows)] // CopyToAsync(Stream, TransportContext) isn't used on unix
         [Fact]

StandardSocketsHttpHandler.FunctionalTests/HttpClientTest.cs

@@ -340,6 +340,8 @@ public async Task SendAsync_DuplicateRequest_ThrowsException()
             }
         }
 
+        // https://github.com/dotnet/runtime/issues/25789
+        [SkipOnTargetFramework(TargetFrameworkMonikers.NetFramework, ".NET Framework disposes request content after send")]
         [Fact]
         public async Task SendAsync_RequestContentNotDisposed()
         {

StandardSocketsHttpHandler.FunctionalTests/SocketsHttpHandlerTest.cs

@@ -405,6 +405,9 @@ public void ConnectTimeout_SetAfterUse_Throws()
             }
         }
 
+        // Note: There is a suggested fix to this issue (https://github.com/dotnet/corefx/pull/38211), 
+        // Unfortunetely the suggested fix will throw either TaskCanceledException or OperationCancelledException, so the exception is not consisdent.
+        [ActiveIssue(26340)] // https://github.com/dotnet/runtime/issues/26340
         [OuterLoop]
         [Fact]
         public async Task ConnectTimeout_TimesOutSSLAuth_Throws()