Added test for _get_dtype_type.
State: closed

 - [ ] closes #xxxx
 - [ x] tests added / passed
 - [ x] passes ``git diff upstream/master --name-only -- '*.py' | flake8 --diff`` (On Windows, ``git diff upstream/master -u -- "*.py" | flake8 --diff`` might work as an alternative.)
 - [ ] whatsnew entry

Tests for ``core.dtype.common._get_dtype_type``.

Labels:
name: Testing
description: pandas testing functions or related to the test suite
name: Dtype Conversions
description: Unexpected or buggy dtype conversions

Comments:
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=h1) Report
> Merging [#16899](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/9d13227345882daaa90f03078c09a9b44a18ce72?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/16899/graphs/tree.svg?width=650&height=150&src=pr&token=eZ4WkYLtcO)](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #16899      +/-   ##
==========================================
- Coverage   90.99%   90.97%   -0.02%     
==========================================
  Files         161      161              
  Lines       49301    49301              
==========================================
- Hits        44861    44852       -9     
- Misses       4440     4449       +9
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.74% <ø> (ø)` | :arrow_up: |
| #single | `40.19% <ø> (-0.07%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `25% <0%> (-58.34%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.71% <0%> (-0.1%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16899?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/16899?src=pr&el=footer). Last update [9d13227...24e237f](https://codecov.io/gh/pandas-dev/pandas/pull/16899?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/16899?src=pr&el=h1) Report
> Merging [#16899](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/8d0c025a4584c0f2d412d060c30fe459dc90b53b?src=pr&el=desc) will **decrease** coverage by `0.04%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/16899/graphs/tree.svg?token=eZ4WkYLtcO&src=pr&width=650&height=150)](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #16899      +/-   ##
==========================================
- Coverage   91.02%   90.97%   -0.05%     
==========================================
  Files         161      161              
  Lines       49303    49303              
==========================================
- Hits        44878    44855      -23     
- Misses       4425     4448      +23
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.75% <ø> (-0.03%)` | :arrow_down: |
| #single | `40.2% <ø> (-0.06%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `25% <0%> (-58.34%)` | :arrow_down: |
| [pandas/plotting/\_converter.py](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL19jb252ZXJ0ZXIucHk=) | `63.23% <0%> (-1.82%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.75% <0%> (-0.1%)` | :arrow_down: |
| [pandas/core/internals.py](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW50ZXJuYWxzLnB5) | `93.36% <0%> (-0.08%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16899?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/16899?src=pr&el=footer). Last update [8d0c025...d39c3df](https://codecov.io/gh/pandas-dev/pandas/pull/16899?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).

meaning DataFrame doesn't have a dtype property 
can you rebase and update
Hello @topper-123! Thanks for updating the PR.



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

##### Comment last updated on July 20, 2017 at 11:59 Hours UTC
Ok, I think it's alright now?
thanks @topper-123 nice tests!