Use function in lesson 17

17-unit-testing.html

@@ -30,15 +30,13 @@
 mocha.setup("bdd");
 
 // a simple component. It would normally be imported from another file
-var MyComponent = () => (
- <div>
- <span className="heading">Title</span>
- </div>
-);
+function MyComponent() {
+ return <div><span className="heading">Title</span></div>;
+}
 
 // the first test, Jest and Mocha both using describe() and it()
-describe("Component", () => {
- it("should render", () => {
+describe("Component", function() {
+ it("should render", function() {
  // a new renderer is created and used to render the component
  var renderer = new ReactShallowRenderer();
  renderer.render(<MyComponent />);
@@ -67,13 +65,13 @@
 // mocking a function to test callback behaviour
 var mockCallback = jest.fn();
 
-describe("Callback", () => {
- it("should be called two times", () => {
+describe("Callback", function() {
+ it("should be called two times", function() {
  // a test function that calls a callback two times
- var callCallback = c => {
+ function callCallback(c) {
  c();
  c();
- };
+ }
 
  callCallback(mockCallback);