Unit test backlog checklist

[tngreene]

I've been developing this addon like a mad man without much pause for making unit tests. Tsk, tsk.

Directives

• GLOBAL directives
  • TEXTURE
  • LOD
  • SCALE_X/Y (should match img)
  • SPACING
  • RANDOM
  • NO_SHADOW
• SKIP_SURFACE (Implement SKIP_SURFACE #2)
  • SKIP_SURFACE water included by default in UI, in case someone is making trees in a swamp I guess and needs it then and only then?
  • SKIP_SURFACE additional directives given
• GROUP and layer number system (Implement GROUP and layer number system #3, Implement TREE frequency weight system #4)
• perlin _PARAMS (Implement perlin _PARAMS directive #5)

WYSIWYG trees

• Vertical detected regardless of how it was made 4c46ccb
• Horizontal detected regardless of how it was made
• TREE parameters detected
• Y_QUAD parameters detected (WYSIWYG Y_QUAD parameters #8)

General stuff

• Hidden (as shown in the viewport) stuff is not exported
• Logger logs and each transport type works
• No sub collections = no layer numbers = invalid forest