Create tests for all GUI components

[Devin-Mix]

Each GUI component should have a unit test available which will test its use both inside and outside the application's drawable area. At minimum, the following cases should be tested for each component:

• The component's anchor is outside of each bound separately as well as combined. This should raise an error.
• The component's anchor is within bounds, but its width and/or height cause it to exceed the application's bounds. This should raise an error.
• The component fills the entirety of the drawable screen area along either or both axes. This should not raise an error.
• The component fits entirely within bounds. This should not raise an error.
• If a component contains sub-components (e.g. text on a button) the same tests as above should be included to determine the behavior of the sub-component when meeting or exceeding the bounds of the main component or screen.