test(makeactioncreator): update test against "payload"

also test for "meta"

improves #35

src/app/store/helpers/makeActionCreator/makeActionCreator.test.js

@@ -3,25 +3,33 @@ import makeActionCreator from './makeActionCreator';
 
 describe('makeActionCreator', () => {
   const GET_INFO = 'GET_INFO';
-  const name = { name: 'Jero' };
+  const payload = { user: { name: 'Jero' } };
 
   it('should return an action creator', () => {
-    const actionCreator = makeActionCreator(GET_INFO, 'user');
+    const actionCreator = makeActionCreator(GET_INFO);
     expect(typeof actionCreator).toBe('function');
   });
 
   it('should return an action when calling the action creator', () => {
-    const actionCreator = makeActionCreator(GET_INFO, 'user');
-    const action = actionCreator(name);
+    const actionCreator = makeActionCreator(GET_INFO);
+    const action = actionCreator(payload);
     expect(action).toEqual(expect.objectContaining({ type: GET_INFO }));
   });
 
   it('should contain action\'s data under "payload" property', () => {
-    const actionCreator = makeActionCreator(GET_INFO, 'user');
-    const action = actionCreator(name);
-    const payload = { user: name };
+    const actionCreator = makeActionCreator(GET_INFO);
+    const action = actionCreator(payload);
     const expectedData = { type: GET_INFO, payload };
     expect(action).toHaveProperty('payload');
     expect(action).toEqual(expectedData);
   });
+
+  it('can contain optional "meta" property and its metadata', () => {
+    const actionCreator = makeActionCreator(GET_INFO);
+    const meta = { callMe: 'some metada for any purpose' };
+    const action = actionCreator(payload, meta);
+    const expectedData = { type: GET_INFO, payload, meta };
+    expect(action).toHaveProperty('meta');
+    expect(action).toEqual(expectedData);
+  });
 });