Added atomic dipole to test.py

[hanao2]

Added atomic dipole to test.py

The current code did not cover this case.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.02% ⚠️

Comparison is base (53a1078) 78.73% compared to head (e884478) 78.72%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2747      +/-   ##
==========================================
- Coverage   78.73%   78.72%   -0.02%     
==========================================
  Files         241      241              
  Lines       25582    25587       +5     
  Branches     1517     1517              
==========================================
+ Hits        20142    20143       +1     
- Misses       5048     5054       +6     
+ Partials      392      390       -2     

Files Changed	Coverage Δ
deepmd/entrypoints/test.py	7.88% <0.00%> (-0.12%)	⬇️

... and 2 files with indirect coverage changes

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