Isolates test data in ListPanelFixtureTest into a new private class named ListData.
Add tests for ListPanelFixture constructor.
Add new constructor ListPanelFixture(Robot, String).
Set the name to formBuilder.getBeanClass().getSimpleName() in JFormPane's constructor.
Add null test cases in FileTypeMapperTest and PathTypeMapperTest.
Add StringPathTypeMapper that maps a String and a JPath.