refactor(server): move timestamp mixin to own module

Author: Walker Leite

meta.js

@@ -35,6 +35,7 @@ module.exports = {
     'server/initial-data/**/*': 'extended',
     'server/models/**/*': 'extended',
     'test/client/components/**/*': 'extended',
+    'test/server/mixins/**/*': 'extended',
     'test/server/account.spec.js': 'extended',
   },
   complete(data, {logger}) {

template/server/mixins/timestamp.js

@@ -0,0 +1,3 @@
+import TimeStamp from 'loopback-ds-timestamp-mixin';
+
+export default TimeStamp;

template/server/model-config.json

@@ -9,9 +9,6 @@
     "mixins": [
       "loopback/common/mixins",
       "loopback/server/mixins",
-      {{#extended}}
-      "../node_modules/loopback-ds-timestamp-mixin",
-      {{/extended}}
       "../common/mixins",
       "./mixins"
     ]

template/test/server/mixins/timestamp.spec.js

@@ -0,0 +1,8 @@
+import TimeStamp from 'loopback-ds-timestamp-mixin';
+import MyTimeStamp from '../../../server/mixins/timestamp';
+
+describe('timestamp mixin', () => {
+  it('export TimeStamp mixin module', () => {
+    expect(MyTimeStamp).toBe(TimeStamp);
+  });
+});