Added global style mock to tests.

jestMocks/styleMock.js

@@ -0,0 +1,34 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license.
+//
+// Microsoft Bot Framework: http://botframework.com
+//
+// Bot Framework Emulator Github:
+// https://github.com/Microsoft/BotFramwork-Emulator
+//
+// Copyright (c) Microsoft Corporation
+// All rights reserved.
+//
+// MIT License:
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED ""AS IS"", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+module.exports = {};

package.json

@@ -46,7 +46,10 @@
       "jsx",
       "json",
       "node"
-    ]
+    ],
+    "moduleNameMapper": {
+      ".\\.scss$": "<rootDir>/jestMocks/styleMock.js"
+    }
   },
   "husky": {
     "hooks": {