Update Microsoft.AspNetCore.Components.E2ETests.csproj

Set SeleniumProcessTrackingFolder

Include package.json

Yarn install

Update Microsoft.AspNetCore.Components.E2ETests.csproj

Update Microsoft.AspNetCore.Components.E2ETests.csproj

Install yarn first

Update Microsoft.AspNetCore.Components.E2ETests.csproj

Update SeleniumStandaloneServer.cs

Update runtests.cmd

Update SeleniumStandaloneServer.cs

Update SeleniumStandaloneServer.cs

Update SeleniumStandaloneServer.cs

Update SeleniumStandaloneServer.cs

Only target VS windows helix queue

Only run on windows, fix npm call

Update Microsoft.AspNetCore.Components.E2ETests.csproj

Update Microsoft.AspNetCore.Components.E2ETests.csproj

Try resolving content root path on helix to current dir

Strip out extra assembly name gunk from content root

publish test assets

use AppContext.BaseDirectory

Author: HaoK

src/Components/test/E2ETest/Infrastructure/ServerFixtures/ServerFixture.cs

@@ -39,6 +39,11 @@ private static Dictionary<string, string> FindProjects()
 
         protected static string FindSampleOrTestSitePath(string projectName)
         {
+            if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("helix")))
+            {
+                return Path.Combine(AppContext.BaseDirectory, projectName.Split(",")[0]);
+            }
+
             var projects = _projects.Value;
             if (projects.TryGetValue(projectName, out var dir))
             {

src/Components/test/E2ETest/Microsoft.AspNetCore.Components.E2ETests.csproj

@@ -11,13 +11,6 @@
       Temporarily disabled until this runs on macOS
     -->
     <SkipTests Condition="'$(SeleniumE2ETestsSupported)' != 'true'">true</SkipTests>
-    <!-- https://github.com/aspnet/AspNetCore/issues/6857 -->
-    <BuildHelixPayload>false</BuildHelixPayload>
-
-    <!-- Tests do not work on Helix or when bin/ directory is not in project directory due to undeclared dependency on test content. -->
-    <BaseOutputPath />
-    <OutputPath />
-
   </PropertyGroup>
 
   <ItemGroup>
@@ -44,7 +37,25 @@
     <ProjectReference Include="..\testassets\TestServer\Components.TestServer.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <HelixPreCommand Include="call npm i yarn;call node_modules\.bin\yarn install" />
+    <HelixContent Include="package.json" />
+    <HelixContent Include="yarn.lock" />
+    <!-- This is currently windows only -->
+    <HelixProjectPlatform Remove="Linux;OSX" />
+    <HelixProjectPlatform Remove="@(HelixProjectPlatform)" />    
+    <HelixProjectTargetQueue Include="Windows.10.Amd64.ClientRS4.VS2017.Open" />
+  </ItemGroup>
+   
   <!-- Shared testing infrastructure for running E2E tests using selenium -->
   <Import Project="$(SharedSourceRoot)E2ETesting\E2ETesting.targets" />
 
+  <Target Name="PublishAssets" AfterTargets="Publish">
+    <ItemGroup>
+      <_PublishFiles Include="$(MSBuildThisFileDirectory)..\testassets\**\*.*" />
+    </ItemGroup>
+    <Copy
+      SourceFiles="@(_PublishFiles)"
+      DestinationFolder="$(PublishDir)\%(RecursiveDir)" />
+  </Target>
 </Project>

src/Shared/E2ETesting/SeleniumStandaloneServer.cs

@@ -107,6 +107,14 @@ private static async Task InitializeInstance(ITestOutputHelper output)
             // It's important that we get the folder value before we start the process to prevent
             // untracked processes when the tracking folder is not correctly configure.
             var trackingFolder = GetProcessTrackingFolder();
+                
+            if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("helix")))
+            {
+                // Just create a random tracking folder on helix
+                trackingFolder = Path.Combine(Directory.GetCurrentDirectory(), Path.GetRandomFileName());
+                Directory.CreateDirectory(trackingFolder);
+            }
+
             if (!Directory.Exists(trackingFolder))
             {
                 throw new InvalidOperationException($"Invalid tracking folder. Set the 'SeleniumProcessTrackingFolder' MSBuild property to a valid folder.");