Behind all of the different scenarios is an extensive postcode check. This check is linked via web services to various external systems that are also used by contractors, project developers and providers. These systems provide information about availability at your address, the availability of fibre optic, any future fibre optic plans, which VDSL alternatives you have, and so on.

Building this availability check was not an easy task for the development team, consisting of both KPN NetwerkNL and We are you employees. The large amount of data required for this is housed in many different systems and the data changes quickly. For example, the status of specific postal codes can change from one day to the next, because they are now connected to fibre optic network. How can you test for all 450 of those situations? A virtual web service, or a mock-up of the existing web services, was the solution for this. This enabled the team to simulate all scenarios and to achieve a level of 100% testability.