TST: clean up series/frame api tests inheritance a bit

[jreback]

No description provided.

[codecov]

Codecov Report

Merging #15949 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master   #15949   +/-   ##
=======================================
  Coverage      91%      91%           
=======================================
  Files         145      145           
  Lines       49576    49576           
=======================================
  Hits        45118    45118           
  Misses       4458     4458

Flag	Coverage Δ
#multiple	88.77% <100%> (ø)	⬆️
#single	40.57% <0%> (ø)	⬆️

Impacted Files	Coverage Δ
pandas/indexes/base.py	96.09% <100%> (ø)	⬆️
pandas/tseries/index.py	95.43% <100%> (ø)	⬆️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #15949 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master   #15949   +/-   ##
=======================================
  Coverage      91%      91%           
=======================================
  Files         145      145           
  Lines       49576    49576           
=======================================
  Hits        45118    45118           
  Misses       4458     4458

Flag	Coverage Δ
#multiple	88.77% <100%> (ø)	⬆️
#single	40.57% <0%> (ø)	⬆️

Impacted Files	Coverage Δ
pandas/indexes/base.py	96.09% <100%> (ø)	⬆️
pandas/tseries/index.py	95.43% <100%> (ø)	⬆️

---

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 f35209e...6a899d3. Read the comment docs.

[codecov]

Codecov Report

Merging #15949 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #15949      +/-   ##
==========================================
- Coverage      91%      91%   -0.01%     
==========================================
  Files         145      145              
  Lines       49581    49576       -5     
==========================================
- Hits        45123    45118       -5     
  Misses       4458     4458

Flag	Coverage Δ
#multiple	88.77% <100%> (-0.01%)	⬇️
#single	40.57% <0%> (ø)	⬆️

Impacted Files	Coverage Δ
pandas/indexes/base.py	96.09% <100%> (ø)	⬆️
pandas/tseries/index.py	95.43% <100%> (ø)	⬆️
pandas/core/algorithms.py	94.53% <0%> (-0.05%)	⬇️
pandas/core/base.py	95.51% <0%> (ø)	⬆️
pandas/core/categorical.py	95.85% <0%> (ø)	⬆️
pandas/indexes/api.py	98.66% <0%> (ø)	⬆️
pandas/core/series.py	94.89% <0%> (ø)	⬆️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9cb2c2d...2f6a9c2. Read the comment docs.