Allow 'type' to be customized for unit test debugging

This checkin allows the unit test debugging options to set 'type'. This resolves #1586.

Author: gregg-miskelly

package.json

@@ -315,6 +315,15 @@
                   "default": true
                 }
               }
+            },
+            "type": {
+              "type": "string",
+              "enum": [
+                "coreclr",
+                "clr"
+              ],
+              "description": "Type type of code to debug. Can be either 'coreclr' for .NET Core debugging, or 'clr' for Desktop .NET Framework. 'clr' only works on Windows as the Desktop framework is Windows-only.",
+              "default": "coreclr"
             }
           }
         },

src/features/dotnetTest.ts

@@ -111,9 +111,12 @@ function createLaunchConfiguration(program: string, args: string, cwd: string, d
         result = {};
     }
 
+    if (!result.type) {
+        result.type = "coreclr";
+    }
+
     // Now fill in the rest of the options
     result.name = ".NET Test Launch";
-    result.type = "coreclr";
     result.request = "launch";
     result.debuggerEventsPipeName = debuggerEventsPipeName;
     result.program = program;