Add NuGet.Config to MSBuildWorkspace tests

src/Workspaces/CoreTestUtilities/TestFiles/Resources.cs

@@ -70,6 +70,7 @@ private static TResult GetOrLoadValue<TResult>(string name, Func<string, TResult
         public static string Directory_Build_props => GetText("Directory.Build.props");
         public static string Directory_Build_targets => GetText("Directory.Build.targets");
         public static byte[] Key_snk => GetBytes("key.snk");
+        public static string NuGet_Config => GetText("NuGet.Config");
 
         public static class SolutionFiles
         {

src/Workspaces/CoreTestUtilities/WorkspaceTestBase.cs

@@ -90,6 +90,7 @@ protected void CreateCSharpFiles()
         protected FileSet GetSimpleCSharpSolutionFiles()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"TestSolution.sln", Resources.SolutionFiles.CSharp),
@@ -101,6 +102,7 @@ protected FileSet GetSimpleCSharpSolutionFiles()
         protected FileSet GetNetCoreApp2Files()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"Project.csproj", Resources.ProjectFiles.CSharp.NetCoreApp2_Project),
@@ -110,6 +112,7 @@ protected FileSet GetNetCoreApp2Files()
         protected FileSet GetNetCoreApp2AndLibraryFiles()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"Project\Project.csproj", Resources.ProjectFiles.CSharp.NetCoreApp2AndLibrary_Project),
@@ -121,6 +124,7 @@ protected FileSet GetNetCoreApp2AndLibraryFiles()
         protected FileSet GetNetCoreApp2AndTwoLibrariesFiles()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"Project\Project.csproj", Resources.ProjectFiles.CSharp.NetCoreApp2AndTwoLibraries_Project),
@@ -134,6 +138,7 @@ protected FileSet GetNetCoreApp2AndTwoLibrariesFiles()
         protected FileSet GetNetCoreMultiTFMFiles()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"Project.csproj", Resources.ProjectFiles.CSharp.NetCoreMultiTFM_Project),
@@ -143,6 +148,7 @@ protected FileSet GetNetCoreMultiTFMFiles()
         protected FileSet GetNetCoreMultiTFMFiles_ProjectReference()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"Project\Project.csproj", Resources.ProjectFiles.CSharp.NetCoreMultiTFM_ProjectReference_Project),
@@ -154,6 +160,7 @@ protected FileSet GetNetCoreMultiTFMFiles_ProjectReference()
         protected FileSet GetNetCoreMultiTFMFiles_ProjectReferenceWithReversedTFMs()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"Project\Project.csproj", Resources.ProjectFiles.CSharp.NetCoreMultiTFM_ProjectReferenceWithReversedTFMs_Project),
@@ -165,6 +172,7 @@ protected FileSet GetNetCoreMultiTFMFiles_ProjectReferenceWithReversedTFMs()
         protected FileSet GetNetCoreMultiTFMFiles_ProjectReferenceToFSharp()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"Solution.sln", Resources.SolutionFiles.NetCoreMultiTFM_ProjectReferenceToFSharp),
@@ -177,6 +185,7 @@ protected FileSet GetNetCoreMultiTFMFiles_ProjectReferenceToFSharp()
         protected FileSet GetMultiProjectSolutionFiles()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"TestSolution.sln", Resources.SolutionFiles.VB_and_CSharp),
@@ -197,6 +206,7 @@ protected FileSet GetMultiProjectSolutionFiles()
         protected FileSet GetProjectReferenceSolutionFiles()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"CSharpProjectReference.sln", Resources.SolutionFiles.CSharp_ProjectReference),
@@ -210,6 +220,7 @@ protected FileSet GetProjectReferenceSolutionFiles()
         protected FileSet GetAnalyzerReferenceSolutionFiles()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"AnalyzerReference.sln", Resources.SolutionFiles.AnalyzerReference),
@@ -231,6 +242,7 @@ protected FileSet GetAnalyzerReferenceSolutionFiles()
         protected FileSet GetSolutionWithDuplicatedGuidFiles()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"DuplicatedGuids.sln", Resources.SolutionFiles.DuplicatedGuids),
@@ -242,6 +254,7 @@ protected FileSet GetSolutionWithDuplicatedGuidFiles()
         protected FileSet GetSolutionWithCircularProjectReferences()
         {
             return new FileSet(
+                (@"NuGet.Config", Resources.NuGet_Config),
                 (@"Directory.Build.props", Resources.Directory_Build_props),
                 (@"Directory.Build.targets", Resources.Directory_Build_targets),
                 (@"CircularSolution.sln", Resources.SolutionFiles.CircularSolution),