Fixturize tests/frame/test_indexing.py
One more step towards #22471. Happy to move the fixture to the `test_indexing` module if that's now the preferred form.
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=h1) Report
> Merging [#25633](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/df771cc81285d944a41a06e3a05db26d7eb915d2?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/25633/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #25633   +/-   ##
=======================================
  Coverage   91.26%   91.26%           
=======================================
  Files         173      173           
  Lines       52968    52968           
=======================================
  Hits        48339    48339           
  Misses       4629     4629
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `89.83% <ø> (ø)` | :arrow_up: |
| #single | `41.71% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=footer). Last update [df771cc...ddc1d44](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=h1) Report
> Merging [#25633](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/de0867f8bedab9ce7d8d4f46267c4c123ff3166c?src=pr&el=desc) will **increase** coverage by `<.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/25633/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #25633      +/-   ##
==========================================
+ Coverage   91.84%   91.85%   +<.01%     
==========================================
  Files         180      174       -6     
  Lines       50734    50722      -12     
==========================================
- Hits        46599    46589      -10     
+ Misses       4135     4133       -2
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.39% <ø> (-0.09%)` | :arrow_down: |
| #single | `41.78% <ø> (-0.18%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/plotting/\_misc.py](https://codecov.io/gh/pandas-dev/pandas/pull/25633/diff?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL19taXNjLnB5) | `38.23% <0%> (-26.63%)` | :arrow_down: |
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/25633/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `78.94% <0%> (-21.06%)` | :arrow_down: |
| [pandas/io/gcs.py](https://codecov.io/gh/pandas-dev/pandas/pull/25633/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2djcy5weQ==) | `80% <0%> (-20%)` | :arrow_down: |
| [pandas/io/s3.py](https://codecov.io/gh/pandas-dev/pandas/pull/25633/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3MzLnB5) | `89.47% <0%> (-10.53%)` | :arrow_down: |
| [pandas/core/groupby/base.py](https://codecov.io/gh/pandas-dev/pandas/pull/25633/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZ3JvdXBieS9iYXNlLnB5) | `91.83% <0%> (-8.17%)` | :arrow_down: |
| [pandas/plotting/\_core.py](https://codecov.io/gh/pandas-dev/pandas/pull/25633/diff?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL19jb3JlLnB5) | `83.77% <0%> (-5.61%)` | :arrow_down: |
| [pandas/io/excel/\_xlrd.py](https://codecov.io/gh/pandas-dev/pandas/pull/25633/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2V4Y2VsL194bHJkLnB5) | `94.54% <0%> (-5.46%)` | :arrow_down: |
| [pandas/io/clipboard/clipboards.py](https://codecov.io/gh/pandas-dev/pandas/pull/25633/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2NsaXBib2FyZC9jbGlwYm9hcmRzLnB5) | `31.64% <0%> (-3.14%)` | :arrow_down: |
| [pandas/io/excel/\_util.py](https://codecov.io/gh/pandas-dev/pandas/pull/25633/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2V4Y2VsL191dGlsLnB5) | `87.32% <0%> (-2.68%)` | :arrow_down: |
| [pandas/core/internals/managers.py](https://codecov.io/gh/pandas-dev/pandas/pull/25633/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW50ZXJuYWxzL21hbmFnZXJzLnB5) | `93.87% <0%> (-2.34%)` | :arrow_down: |
| ... and [93 more](https://codecov.io/gh/pandas-dev/pandas/pull/25633/diff?src=pr&el=tree-more) | |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=footer). Last update [de0867f...4e48d44](https://codecov.io/gh/pandas-dev/pandas/pull/25633?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 @jreback 
Split up the test and it's green. @jreback 
Any suggestions how you would implement that fixturization you want? this one might be ok, merge master and ping on green. closing as stale @jreback

Sorry, I overlooked the request to merge master (busy times last month). Please reopen and I'll happily update. @h-vetinari can you merge master

Conflicting files
pandas/tests/frame/test_indexing.py @simonjayhawkins Thanks for reopening; merged master. pls merge master and will look again Thanks for taking care of this! thanks @h-vetinari 