bug(webpack): Added ContextReplacementPlugin to remove ng test warning

Author: delasteve

packages/angular-cli/models/webpack-build-test.js

@@ -89,6 +89,10 @@ const getWebpackTestConfig = function (projectRoot, environment, appConfig) {
         new RegExp(path.resolve(appRoot, appConfig.environments['source'])
           .replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, '\\$&')),
         path.resolve(appRoot, appConfig.environments[environment])
+      ),
+      new webpack.ContextReplacementPlugin(
+        /angular(\\|\/)core(\\|\/)(esm(\\|\/)src|src)(\\|\/)linker/,
+        appRoot
       )
     ],
     tslint: {