Let's take a test-driven approach to adding new features to our application. We'll need a way to add new items to our todo list, so let's start by writing our tests first. Inside TodoList.spec.js, we'll add another it assertion that should add an item to our todo list:
it('should add an item to the todo list', () => { const wrapper = mount(TodoList); const todos = wrapper.vm.todos; const newTodos = wrapper.vm.addTodo('Go to work'); expect(todos.length).toBeLessThan(newTodos.length);});
If we run our tests right now, we'll get a failing test this is expected!:
Let's do the minimum possible to fix our error. We can add a ...
