Add todos reducer and tests

Author: adamth

app/reducers/reducers.jsx

@@ -1,3 +1,6 @@
+const uuid = require('node-uuid');
+const moment = require('moment');
+
 export var searchTextReducer = (state = '', action) => {
     switch(action.type){
         case 'SET_SEARCH_TEXT':
@@ -14,4 +17,34 @@ export var showCompletedReducer = (state = false, action) => {
         default:
             return state;
     };
-};
+};
+
+export var todoReducer = (state = [], action) => {
+    switch(action.type){
+        case 'ADD_TODO':
+            return [
+                ...state,
+                {
+                    id: uuid(),
+                    text: action.text,
+                    completed: false,
+                    createdAt: moment().unix(),
+                    completedAt: undefined
+                }
+            ];
+        case 'TOGGLE_TODO':
+            return state.map((todo) => {
+                if(todo.id === action.id)
+                { 
+                    var nextCompleted = !todo.completed;
+                    return {
+                        ...todo,
+                        completed: nextCompleted,
+                        completedAt: nextCompleted ? moment().unix() : undefined
+                    };
+                };
+            });
+        default:
+            return state;
+    };
+};

app/tests/reducers/reducers.test.jsx

@@ -28,4 +28,39 @@ describe('Reducers',() => {
             expect(res).toEqual(true);
         });
     });
+
+    describe('todosReducer', () => {
+        it('should add new todo', () => {
+            var action = {
+                type:'ADD_TODO',
+                text:'Walk'
+            }
+
+            var res = reducers.todoReducer(df([]), df(action));
+
+            expect(res.length).toBe(1);
+            expect(res[0].text).toEqual(action.text);
+        });
+
+         it('should toggle a todo', () => {
+            var action = {
+                type:'TOGGLE_TODO',
+                id:1
+            }
+
+            var todo = [{
+                    id: 1,
+                    text: 'Text',
+                    completed: false,
+                    createdAt: 1,
+                    completedAt: undefined
+                }];
+
+            var res = reducers.todoReducer(df(todo), df(action));
+
+            expect(res.length).toBe(1);
+            expect(res[0].completed).toBe(true);
+            expect(res[0].completedAt).toBeA('number');
+        });
+    });
 });

webpack.config.js

@@ -38,7 +38,7 @@ module.exports = {
             {
                 loader: 'babel-loader',
                 query: {
-                    presets: ['react', 'es2015']
+                    presets: ['react', 'es2015', 'stage-0']
                 },
                 test: /\.jsx?$/,
                 exclude: /(node_modules|bower_components)/