Fixing dotnet-test.Tests to use a portable test app - ProjectWithTests.

The ProjectWithTests needed to be moved outside of TestAssets\TestProjects because it can't be restored --infer-runtimes and it has to be built with netcoreapp1.0.

scripts/dotnet-cli-build/TestTargets.cs

@@ -93,7 +93,17 @@ namespace Microsoft.DotNet.Cli.Build
                 "--fallbacksource", Dirs.TestPackages,
                 "--fallbacksource", Dirs.Corehost)
                 .WorkingDirectory(Path.Combine(c.BuildContext.BuildDirectory, "TestAssets", "TestProjects"))
-                .Execute().EnsureSuccessful();
+                .Execute()
+                .EnsureSuccessful();
+
+            // The 'ProjectWithTests' is a portable test app. Cannot call --infer-runtimes on it, since on win x64 machines,
+            // the x86 runtime is being inferred, and there are no x86 DotNetHost packages
+            dotnet.Restore(
+                "--verbosity", "verbose",
+                "--fallbacksource", Dirs.Corehost)
+                .WorkingDirectory(Path.Combine(c.BuildContext.BuildDirectory, "TestAssets", "ProjectWithTests"))
+                .Execute()
+                .EnsureSuccessful();
 
             // The 'ProjectModelServer' directory contains intentionally-unresolved dependencies, so don't check for success. Also, suppress the output
             dotnet.Restore(
@@ -248,6 +258,14 @@ namespace Microsoft.DotNet.Cli.Build
                     .EnsureSuccessful();
             }
 
+            // build ProjectWithTests, which is outside of TestProjects and targets netcoreapp
+            string projectWithTests = Path.Combine(c.BuildContext.BuildDirectory, "TestAssets", "ProjectWithTests");
+            c.Info($"Building: {projectWithTests}");
+            dotnet.Build("--framework", "netcoreapp1.0")
+                .WorkingDirectory(projectWithTests)
+                .Execute()
+                .EnsureSuccessful();
+
             return c.Success();
         }