Add harder test

[rom1504]

https://github.com/PrismarineJS/prismarine-physics/blob/master/test/basic.test.js is too easy
We should have another test with all information missing or partially missing to catch issues before people come to report them.

[rom1504]

Once #23 is done , tests can try to change all the values of the player state spec and make sure nothing wrong happen in simulation (at least no crash)