CLN: fixturize & split test_base

[jreback]

it would be nice to use our indices fixture rather than the self.indices in pandas/tests/test_base.py as this is a bit cleaner and more flexible esp with subclasses. We also might consider splitting up test_base.py to some extent by function maybe splitting up to

test_construction
test_set_ops
test_reshaping
test_indexing

would accept multiple PR's to close this.

[charlesdong1991]

I would like to give a try if it hasn't been picked.
And I will appreciate a lot if you could explain a bit clearer about the issue, i haven't found self.indices in pandas/tests/test_base.py.

[nixphix]

@charlesdong1991 I figured that we need to add fixture for indexes. @jreback I made some changes to test_base could you pls let me know if thats what you wanted to do?

[SaturnFromTitan]

take