How to use Azure AD Single sign on with Cypress

The challenge

At my current assignment we recently introduced Azure active directory based single sign on(SSO). Since we are building a React app we were able to leverage the react-adal library and implementing SSO on the front-end side was a matter of hours instead of days.

This however did pose a challenge for our end-to-end tests. We aim to perform a cycle that is as complete as possible in our end-to-end tests and decided that a valid JWT token and its validation should also be part of that suite. Cypress is our end-to-end testing tool and this offers a recipe for testing applications that use single sign on. Unfortunately this recipe didn’t provide us with a working solution, mainly because the (react-)adal library utilizes cross origin iframes for (re-) authentication. Cypress also runs the application under test in an iframe so we cannot leverage the existing iframe detection offered by react-adal.

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Iterables, Iterators and Generator functions in ES2015

ES2015 adds a lot of new features to javascript that make a number of powerful constructs, present in other languages for years, available in the browser (well as soon as support for those features is rolled out of course, but in the meantime we can use these features by using a transpiler such as Babeljs or Traceur).
Some of the more complicated additions are the iterator and iterable protocols and generator functions. In this post I’ll explain what they are and what you can use them for.

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AngularJS e2e testing using ngMockE2E

For our project we needed a mock http backend that we could instruct to return predefined responses so we were able to e2e test our full application without having a ‘real’ backend. This way we do not have to account for any state in the backend and can run our tests in isolation.


  • Reuse the mockdata object created for our unit tests
  • Reuse the config object in which we define the backend endpoints
  • Have little or no impact on the production code

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