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User Interface (UI) tests allow you to test your application from the outside, just as your users would see the application. Every time you decide to run your application on the simulator or device, you are, in effect, testing the UI of your application. Since Xcode 7, Apple has provided the ability to create automated UI tests. These automated UI tests are great at finding regression defects, and used correctly can reduce the regression testing effort for your apps.

Many a Lisp “newbie” has been seen complaining that while Common Lisp is a cool language, it is and always was pretty weak as far as graphical user interfaces (GUIs) are concerned.

This chapter will explain the basic components of a graphical user interface (GUI) and how to use them in Java applications. We will begin to explore the different types of relationships between classes and document both the classes and their relationships using the Unified Modeling Language (UML).

GUI applications revolve around events, and F# provides a natural way to process events with functions. Graphical interfaces are often developed using visual editors, in particular to build GUIs by assembling controls. Applications, however, often need drawing capabilities for displaying and manipulating data, which requires custom programming to augment available controls. This chapter will discuss how to develop graphical applications with F# and why the functional traits of the language suit the event-driven programming paradigm typical of GUIs.

GUI applications revolve around events, and F# provides a natural way to process events with functions. Graphical interfaces are often developed using visual editors, in particular to build GUIs by assembling controls. Applications, however, often need drawing capabilities for displaying and manipulating data, which requires custom programming to augment available controls. This chapter discusses how to develop graphical applications with F# and why the functional traits of the language suit the event-driven programming paradigm typical of GUIs.

Many resource-constrained devices do not need a complex graphical display. They provide an intuitive user interface with buttons and LEDs or a simple text display. However, there is a growing demand for devices that provide a complex user interface with a detailed graphical display. The .NET Micro Framework provides built-in support for color LCD displays, if your device has one.