TST: Move some Series ctor tests to SharedWithSparse
 - [x] closes https://github.com/pandas-dev/pandas/pull/16906
 - [x] tests added / passed
 - [x] passes ``git diff upstream/master -u -- "*.py" | flake8 --diff``
 - [x] whatsnew entry

Continues https://github.com/pandas-dev/pandas/pull/16906.
Hello @kernc! Thanks for updating the PR.









Cheers ! There are no PEP8 issues in this Pull Request. :beers: 

##### Comment last updated on July 22, 2017 at 16:32 Hours UTC # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=h1) Report
> Merging [#17050](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/4efe6560e07f28de6a1834fa90e31cef31b0fb18?src=pr&el=desc) will **decrease** coverage by `0.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/17050/graphs/tree.svg?src=pr&token=eZ4WkYLtcO&width=650&height=150)](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #17050      +/-   ##
==========================================
- Coverage   91.05%   91.03%   -0.02%     
==========================================
  Files         161      161              
  Lines       49350    49350              
==========================================
- Hits        44936    44927       -9     
- Misses       4414     4423       +9
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.81% <ø> (ø)` | :arrow_up: |
| #single | `40.26% <ø> (-0.07%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `25% <0%> (-58.34%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.75% <0%> (-0.1%)` | :arrow_down: |
| [pandas/io/html.py](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=tree#diff-cGFuZGFzL2lvL2h0bWwucHk=) | `84.85% <0%> (ø)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17050?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/17050?src=pr&el=footer). Last update [4efe656...588acac](https://codecov.io/gh/pandas-dev/pandas/pull/17050?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/17050?src=pr&el=h1) Report
> Merging [#17050](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/c0a84b59f5b9638ddabcd49ad664fa5850f02135?src=pr&el=desc) will **decrease** coverage by `0.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/17050/graphs/tree.svg?width=650&height=150&src=pr&token=eZ4WkYLtcO)](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #17050      +/-   ##
==========================================
- Coverage   91.02%   91.01%   -0.02%     
==========================================
  Files         161      161              
  Lines       49350    49350              
==========================================
- Hits        44923    44914       -9     
- Misses       4427     4436       +9
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.78% <ø> (ø)` | :arrow_up: |
| #single | `40.26% <ø> (-0.07%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `25% <0%> (-58.34%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.75% <0%> (-0.1%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17050?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/17050?src=pr&el=footer). Last update [c0a84b5...61d10fb](https://codecov.io/gh/pandas-dev/pandas/pull/17050?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 thanks @kernc 

happy to have you do the same for SparseFrame as well. 