Reenable component E2E tests on helix

Author: HaoK

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

@@ -40,6 +40,11 @@ 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

@@ -7,19 +7,10 @@
     <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
     <TestGroupName>Components.E2ETests</TestGroupName>
 
-    <!-- https://github.com/aspnet/AspNetCore/issues/6857 -->
-    <BuildHelixPayload>false</BuildHelixPayload>
-    
     <!-- Run on platforms where we support Selenium -->
     <SkipTests Condition="'$(SeleniumE2ETestsSupported)' != 'true'">true</SkipTests>
 
-    <!-- Tests do not work on Helix or when bin/ directory is not in project directory due to undeclared dependency on test content. -->
-    <BaseOutputPath />
-    
-    <OutputPath />
-
     <GenerateLoggingTestingAssemblyAttributes>false</GenerateLoggingTestingAssemblyAttributes>
-
   </PropertyGroup>
 
   <ItemGroup>
@@ -46,6 +37,17 @@
     <ProjectReference Include="..\testassets\BasicTestApp\BasicTestApp.csproj" />
     <ProjectReference Include="..\testassets\Ignitor\Ignitor.csproj" />
     <ProjectReference Include="..\testassets\TestServer\Components.TestServer.csproj" />
+    <Content Include="..\testassets\**\*" />
+  </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 -->

src/Shared/E2ETesting/SeleniumStandaloneServer.cs

@@ -100,6 +100,13 @@ private static async Task InitializeInstance(ITestOutputHelper output)
                 psi.Arguments = $"/c npm {psi.Arguments}";
             }
 
+            if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("helix")))
+            {
+                // Just create a random tracking folder on helix
+                trackingFolder = Path.Combine(Directory.GetCurrentDirectory(), Path.GetRandomFileName());
+                Directory.CreateDirectory(trackingFolder);
+            }
+
             // 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();