TST: Iterrows making incorrect assumptions about datetime

[simonjayhawkins]

• closes Iterrows making incorrect assumptions about datetime #12222
• tests added / passed
• passes git diff upstream/master -u -- "*.py" | flake8 --diff
• [ n/a] whatsnew entry

[codecov]

Codecov Report

Merging #26441 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #26441      +/-   ##
==========================================
- Coverage   91.73%   91.72%   -0.01%     
==========================================
  Files         174      174              
  Lines       50738    50738              
==========================================
- Hits        46545    46541       -4     
- Misses       4193     4197       +4

Flag	Coverage Δ
#multiple	90.23% <ø> (ø)	⬆️
#single	41.7% <ø> (-0.06%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	78.94% <0%> (-10.53%)	⬇️
pandas/core/frame.py	97.02% <0%> (-0.12%)	⬇️

---

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[codecov]

Codecov Report

Merging #26441 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #26441      +/-   ##
==========================================
- Coverage   91.73%   91.72%   -0.01%     
==========================================
  Files         174      174              
  Lines       50745    50745              
==========================================
- Hits        46551    46547       -4     
- Misses       4194     4198       +4

Flag	Coverage Δ
#multiple	90.23% <ø> (ø)	⬆️
#single	41.69% <ø> (-0.09%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	78.94% <0%> (-10.53%)	⬇️
pandas/core/frame.py	97.02% <0%> (-0.12%)	⬇️

---

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 a7d3cc9...54ffcb4. Read the comment docs.

[jreback]

thanks @simonjayhawkins