You can start developing your tests early since MSL allows you to execute tests without the integrated server-side backend. Run your client-side code tests early and more frequently.
MSL allows you to test against the interface of your service layer. Test your client-side code and identify bugs in isolation without worrying about the complexities of server-side code and data.
You can run your tests much faster and with more robustness since you can mock the service layer. You have full control of your test data and the application flow.
This project is developed and maintained by the Open Source community on GitHub. You can use MSL for free and easily extend it for your needs.