update credit-card integration test

tests/integration/components/donation/credit-card-test.js

@@ -4,6 +4,9 @@ import PageObject from 'ember-cli-page-object';
 import stubService from 'code-corps-ember/tests/helpers/stub-service';
 import setHandler from 'code-corps-ember/tests/helpers/set-handler';
 import creditCardComponent from '../../../pages/components/donation/credit-card';
+import Ember from 'ember';
+
+const { RSVP: { Promise }} = Ember;
 
 let page = PageObject.create(creditCardComponent);
 
@@ -19,7 +22,7 @@ moduleForComponent('donation/credit-card', 'Integration | Component | donation/c
 });
 
 test('it sends submit with credit card fields when button is clicked', function(assert) {
-  assert.expect(2);
+  assert.expect(1);
 
   this.set('canDonate', true);
 
@@ -32,6 +35,7 @@ test('it sends submit with credit card fields when button is clicked', function(
 
   let submitHandler = function(actualProps) {
     assert.deepEqual(actualProps, expectedProps, 'Action was called with proper attributes.');
+    return Promise.resolve();
   };
 
   setHandler(this, 'submit', submitHandler);
@@ -50,6 +54,4 @@ test('it sends submit with credit card fields when button is clicked', function(
       .cardYear(expectedProps.year)
       .cardCVC(expectedProps.cvc)
       .clickSubmit();
-
-  assert.ok(page.submitDisabled, 'Submit button got disabled.');
 });