Additional test cases

[b5]

From @dustmop : Other tests I think would be good to have:

insert into the middle of an array:

[[1],[2],[4],[5]]
[[1],[2],[3],[4],[5]]

row of a table completely changing:

[[1,2,3],[4,5,6],[7,8,9]]
[[1,2,3],[10,11,12],[7,8,9]]