BUG: resolving issue 16357 - added a check to see if input is pandas.NaT

[theodoreschen]

• closes BUG: insert NaT into tz-aware DTI. #16357
• tests added / passed
• passes git diff upstream/master --name-only -- '*.py' | flake8 --diff
• whatsnew entry

[jreback]

pls add a whatsnew entry in 0.20.2

the first thing to add even before code is a replicating test!. run the code and the test should fail (so you know that your test is good), then then patch should make the previously failing test pass.

[jreback]

this should use and instead of a nested if.

[codecov]

Codecov Report

Merging #16501 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #16501      +/-   ##
==========================================
+ Coverage   90.43%   90.43%   +<.01%     
==========================================
  Files         161      161              
  Lines       51045    51046       +1     
==========================================
+ Hits        46161    46162       +1     
  Misses       4884     4884

Flag	Coverage Δ
#multiple	88.27% <100%> (ø)	⬆️
#single	40.16% <0%> (-0.01%)	⬇️

Impacted Files	Coverage Δ
pandas/core/indexes/datetimes.py	95.33% <100%> (ø)	⬆️

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[codecov]

Codecov Report

Merging #16501 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #16501      +/-   ##
==========================================
+ Coverage      91%      91%   +<.01%     
==========================================
  Files         161      161              
  Lines       49308    49309       +1     
==========================================
+ Hits        44871    44875       +4     
+ Misses       4437     4434       -3

Flag	Coverage Δ
#multiple	88.78% <100%> (+0.02%)	⬆️
#single	40.19% <0%> (-0.07%)	⬇️

Impacted Files	Coverage Δ
pandas/core/indexes/datetimes.py	95.33% <100%> (ø)	⬆️
pandas/io/gbq.py	25% <0%> (-58.34%)	⬇️
pandas/core/frame.py	97.75% <0%> (-0.1%)	⬇️
pandas/plotting/_converter.py	65.05% <0%> (+1.81%)	⬆️

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[jreback]

can you rebase and update?

couple of comments.

[jreback]

can you u rebase and update & change release note to 0.21.0

[jreback]

can you rebase / update according to comments

[jreback]

can you add the test from the issue & rebase

[jreback]

closing as stale. if you want to finish up. pls ping and we can reopen.