There is a common misconception about mandatory interfaces for easy unit testing and mocking. This myth causes a lot of plumbing in Java EE projects. This screencast shows how to mock classes directly--without any interfaces:
Web Apps, SPA, PWA with vanilla Java Script (ES 6+), CSS 3 and WebStandards only. As simple as possible, but not simpler. See you at: (Progressive) Web apps, Single Page Apps and WebStandards airhacks workshops at MUC airport, Winter Edition
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