Use fixtures

http://guides.emberjs.com/v1.10.0/getting-started/using-fixtures/

```
ember g adapter application
sed -i .bak 's/RESTAdapter/FixtureAdapter/g' app/adapters/application.js && rm app/adapters/application.js.bak
```

app/adapters/application.js

@@ -0,0 +1,4 @@
+import DS from 'ember-data';
+
+export default DS.FixtureAdapter.extend({
+});

app/models/todo.js

@@ -1,6 +1,28 @@
 import DS from 'ember-data';
 
-export default DS.Model.extend({
+var Todo = DS.Model.extend({
   title: DS.attr('string'),
   isCompleted: DS.attr('boolean')
 });
+
+Todo.reopenClass({
+  FIXTURES: [
+    {
+      id: 1,
+      title: 'Learn Ember.js',
+      isCompleted: true
+    },
+    {
+      id: 2,
+      title: '...',
+      isCompleted: false
+    },
+    {
+      id: 3,
+      title: 'Profit!',
+      isCompleted: false
+    }
+  ]
+});
+
+export default Todo;

tests/unit/adapters/application-test.js

@@ -0,0 +1,15 @@
+import {
+  moduleFor,
+  test
+} from 'ember-qunit';
+
+moduleFor('adapter:application', 'ApplicationAdapter', {
+  // Specify the other units that are required for this test.
+  // needs: ['serializer:foo']
+});
+
+// Replace this with your real tests.
+test('it exists', function(assert) {
+  var adapter = this.subject();
+  assert.ok(adapter);
+});