TST: add test for .unique() dtype preserving#29515

Merged

jreback merged 5 commits intopandas-dev:masterfrom

ganevgv:tests/unique_preserve_dtype_test

Nov 14, 2019

Commits on Nov 9, 2019

Commits on Nov 11, 2019

use np.sctypes to extract all dtypes
ganevgv
committed

Commits on Nov 13, 2019