Fixed jest configuration in package.json so that it actually runs ins…

…tead of having security issues (see √=jestjs/jest#6769).

Added first test - simple mock/expectation test to enemyService.test.js

js/src/enemyService.test.js

@@ -0,0 +1,15 @@
+const underTest = require('./enemyService.js')
+var enemyManager = require('./enemyManager.js')
+var playerModule = require('./player.js')
+var enemyDrawer = require('./enemyDrawer.js')
+var collisionDetectionModule = require('./collisionDetection.js')
+
+jest.mock('./enemyManager.js')
+jest.mock('./player.js')
+jest.mock('./enemyDrawer.js')
+jest.mock('./collisionDetection.js')
+
+test('addEnemy calls the enemyManager addEnemy function', () => {
+  underTest.addEnemy(1, 2)
+  expect(enemyManager.addEnemy).toHaveBeenCalledWith(1, 2)
+})

package.json

@@ -13,5 +13,9 @@
     "prebundle": "eslint .",
     "bundleNoLint": "browserify js/src/main.js -o js/src/bundle.js",
     "test": "jest"
+  },
+  "jest":{
+    "verbose": true,
+    "testURL": "http://localhost/"
   }
 }