Test dataframe setting on index/slice behaviour in relation to Pandas COW

[Erik-Geo]

When turning off COW, you are able to set a value on an index or slice of e.g. a LayeredData.data.df like so:

LayeredData.data.df["column"].iloc[slice(0, 2)] = "iets"

This should work. However, COW will default to True starting with Pandas 3.0, so we have to keep an eye on this. Therefore we must create explicit unit tests to test Header and Data (geodataframe) modifications on indices or slices.

According to the authors of Pandas:

"pandas indexing behavior is tricky to understand"