Error in testing when updating arguments passed to stripe components

Even though we have turned the mock config option on during testing, we still get an error about a missing method, update, when running our test suite:

Uncaught TypeError: Ember.get(...).update is not a function

It's pointing to here:

https://github.com/code-corps/ember-stripe-elements/blob/74540fc5ed106b86916eef2c29059e231095903d/addon/components/stripe-element.js#L54-L57

I'm guessing this is just because that method isn't mocked in your StripeMock class and that's merely because you don't have any tests that try to update the attributes after rendering. Replacing your mock with our own copy which also mocks the update function makes our tests pass again.

Migrated from: https://github.com/code-corps/ember-stripe-elements/issues/48