Adding a test that verifies that running dotnet migrate solution.sln will only migrate the projects in the solution file.

TestAssets/NonRestoredTestProjects/PJAppWithSlnAndXprojRefs/TestApp/TestAssets/TestAsset/Program.cs

@@ -0,0 +1,12 @@
+using System;
+
+namespace App.Tests
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World!");
+        }
+    }
+}

TestAssets/NonRestoredTestProjects/PJAppWithSlnAndXprojRefs/TestApp/TestAssets/TestAsset/project.json

@@ -0,0 +1,15 @@
+{
+  "frameworks": {
+    "netcoreapp1.0": {
+      "imports": [
+        "portable-net451+win8"
+      ],
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "version": "1.0.0",
+          "type": "platform"
+        }
+      }
+    }
+  }
+}