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diff --git a/src/web/js/stores/__tests__/TodoStore-test.js b/src/web/js/stores/__tests__/TodoStore-test.js
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+++ b/src/web/js/stores/__tests__/TodoStore-test.js
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+/*
+ * Copyright (c) 2014-2015, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * TodoStore-test
+ */
+
+jest.dontMock('../../constants/TodoConstants');
+jest.dontMock('../TodoStore');
+jest.dontMock('object-assign');
+
+describe('TodoStore', function() {
+
+  var TodoConstants = require('../../constants/TodoConstants');
+  var AppDispatcher;
+  var TodoStore;
+  var callback;
+
+  // mock actions
+  var actionTodoCreate = {
+    actionType: TodoConstants.TODO_CREATE,
+    text: 'foo'
+  };
+  var actionTodoDestroy = {
+    actionType: TodoConstants.TODO_DESTROY,
+    id: 'replace me in test'
+  };
+
+  beforeEach(function() {
+    AppDispatcher = require('../../dispatcher/AppDispatcher');
+    TodoStore = require('../TodoStore');
+    callback = AppDispatcher.register.mock.calls[0][0];
+  });
+
+  it('registers a callback with the dispatcher', function() {
+    expect(AppDispatcher.register.mock.calls.length).toBe(1);
+  });
+
+  it('should initialize with no to-do items', function() {
+    var all = TodoStore.getAll();
+    expect(all).toEqual({});
+  });
+
+  it('creates a to-do item', function() {
+    callback(actionTodoCreate);
+    var all = TodoStore.getAll();
+    var keys = Object.keys(all);
+    expect(keys.length).toBe(1);
+    expect(all[keys[0]].text).toEqual('foo');
+  });
+
+  it('destroys a to-do item', function() {
+    callback(actionTodoCreate);
+    var all = TodoStore.getAll();
+    var keys = Object.keys(all);
+    expect(keys.length).toBe(1);
+    actionTodoDestroy.id = keys[0];
+    callback(actionTodoDestroy);
+    expect(all[keys[0]]).toBeUndefined();
+  });
+
+  it('can determine whether all to-do items are complete', function() {
+    var i = 0;
+    for (; i < 3; i++) {
+      callback(actionTodoCreate);
+    }
+    expect(Object.keys(TodoStore.getAll()).length).toBe(3);
+    expect(TodoStore.areAllComplete()).toBe(false);
+
+    var all = TodoStore.getAll();
+    for (key in all) {
+      callback({
+        actionType: TodoConstants.TODO_COMPLETE,
+        id: key
+      });
+    }
+    expect(TodoStore.areAllComplete()).toBe(true);
+
+    callback({
+      actionType: TodoConstants.TODO_UNDO_COMPLETE,
+      id: key
+    });
+    expect(TodoStore.areAllComplete()).toBe(false);
+  });
+
+});