this implementation is very rough due to having to hack around lots more MCPE bullshit, and currently doesn't allow dynamic coral types; but it's there. We'll clean this up after 1.13 migration is done.
mushroom stem (and all-sided stem) are unique blocks, which don't drop anything and which don't stack with other shroom variants when block-picked.
They also get mapped to the same block when placed, and there's no distinction between red mushroom stem and brown mushroom stem.
there are some complications with coral plants due to the fact we're stuck with R12 worlds right now - and also coral fans are a major pain to implement due to how messed up the metadata is.
Not allowing this makes stuff like anvil damage, colour, wood type, live/dead bit, wet/dry etc all too much hassle to deal with.
Naturally I want to get rid of this shit altogether, but first it's necessary to construct a new system that we can shift into before all this bullshit can be addressed fully, so for now we have to work within the bounds of the old system.
This change will permit dynamic colours for concrete/concrete powder etc, dynamic wood types where the wood type isn't embedded in the legacy ID, and so forth. Allowing full flexibility requires either more old system hacks or completing the migration to a new system which doesn't have these limitations. I prefer to do the latter, but this change will make it somewhat easier to do.
This test is intended to enforce that the BlockFactory always has the same blocks in it from one commit to the next. Since there are a lot of changes going on right now around this, it's important that this is checked because bugs can go under the radar when large changes are happening.
The consistency check will need to be regenerated whenever a new block is registered, new states are found or when things are removed.
