TST: series/indexing tests parameterization + moving test methods
State: closed

Parts 2 and 3 of #20014. 
- tests parameterization
- moving some tests from test_indexing.py to other files 
- test methods reordering in test_indexing.py

- [x] closes #20014
- [x] tests added / passed
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`


Labels:
name: Testing
description: pandas testing functions or related to the test suite
name: Indexing
description: Related to indexing on series/frames, not to indexes themselves

Comments:
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/20059?src=pr&el=h1) Report
> Merging [#20059](https://codecov.io/gh/pandas-dev/pandas/pull/20059?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/7c14e4f14aff216be558bf5d4d2d00b4838c2360?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/20059/graphs/tree.svg?width=650&src=pr&token=eZ4WkYLtcO&height=150)](https://codecov.io/gh/pandas-dev/pandas/pull/20059?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #20059      +/-   ##
==========================================
- Coverage   91.72%   91.72%   -0.01%     
==========================================
  Files         150      150              
  Lines       49122    49112      -10     
==========================================
- Hits        45057    45047      -10     
  Misses       4065     4065
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.1% <ø> (-0.01%)` | :arrow_down: |
| #single | `41.86% <ø> (ø)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/20059?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/reshape/tile.py](https://codecov.io/gh/pandas-dev/pandas/pull/20059/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvcmVzaGFwZS90aWxlLnB5) | `92.94% <0%> (-0.43%)` | :arrow_down: |
| [pandas/core/window.py](https://codecov.io/gh/pandas-dev/pandas/pull/20059/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvd2luZG93LnB5) | `96.31% <0%> (ø)` | :arrow_up: |
| [pandas/core/indexes/base.py](https://codecov.io/gh/pandas-dev/pandas/pull/20059/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9iYXNlLnB5) | `96.66% <0%> (ø)` | :arrow_up: |

------

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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/20059?src=pr&el=footer). Last update [7c14e4f...a6afd95](https://codecov.io/gh/pandas-dev/pandas/pull/20059?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).

very nice @almaleksia !
if you wanted to move the JOIN_TYPES to the top-level ``pandas/conftest.py`` (and make it a fixture),  and prob rename to join_types, would be *really* helpful. note that this will percolate to lots of other modules, mainly in pandas/tests/reshape where they are actually used. 
I *think* we have an issue about this (or at least about generally moving things like this to fixtures). Also would be great to split up pandas/tests/frame/test_indexing.py along the same lines as you did here :-D
@jreback thanks! I can create separate PRs for joins and frame/test_indexing refactoring