fix async with in TestClient.ws_connect

[barrachri]

What do these changes do?

Add async with support for TestClient.ws_connect

Are there changes in behavior for the user?

No

Related issue number

#2525

Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes
• If you provide code modification, please add yourself to CONTRIBUTORS.txt
  • The format is <Name> <Surname>.
  • Please keep alphabetical order, the file is sorted by names.
• Add a new news fragment into the CHANGES folder
  • name it <issue_id>.<type> for example (588.bug)
  • if you don't have an issue_id change it to the pr id after creating the pr
  • ensure type is one of the following:
    • .feature: Signifying a new feature.
    • .bugfix: Signifying a bug fix.
    • .doc: Signifying a documentation improvement.
    • .removal: Signifying a deprecation or removal of public API.
    • .misc: A ticket has been closed, but it is not of interest to users.
  • Make sure to use full sentences with correct case and punctuation, for example: "Fix issue with non-ascii contents in doctest text files."

[samuelcolvin]

Issue numbers in titles don't work as links and generally don't mean much to people.

Best to use a short descriptive title and add the issue number to the body.

[barrachri]

Thanks, should be more expressive now.

[asvetlov]

The change looks good but worth for a new test for added functionality.
tests/test_test_utils.py already has a test for await TestClient.ws_connect(), adding a new one for async with TestClient.ws_connect() should be easy.

[codecov-io]

Codecov Report

Merging #2528 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2528      +/-   ##
==========================================
+ Coverage   97.13%   97.13%   +<.01%     
==========================================
  Files          39       39              
  Lines        8068     8070       +2     
  Branches     1415     1415              
==========================================
+ Hits         7837     7839       +2     
  Misses         99       99              
  Partials      132      132

Impacted Files	Coverage Δ
aiohttp/test_utils.py	98.23% <100%> (+0.01%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b39600f...6098169. Read the comment docs.

[asvetlov]

thanks!

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a [new issue] for related bugs.
If you feel like there's important points made in this discussion, please include those exceprts into that [new issue].
[new issue]: https://github.com/aio-libs/aiohttp/issues/new