Add more test

[superstar54]

• for workgraph.py

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 98.70130% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.72%. Comparing base (dd6fc9b) to head (2c430a0).

Files with missing lines	Patch %	Lines
src/aiida_workgraph/task.py	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #378      +/-   ##
==========================================
+ Coverage   89.57%   90.72%   +1.14%     
==========================================
  Files          61       63       +2     
  Lines        4507     4580      +73     
==========================================
+ Hits         4037     4155     +118     
+ Misses        470      425      -45     

Flag	Coverage Δ
python-3.11	90.67% <98.70%> (+1.14%)	⬆️
python-3.12	?
python-3.9	90.71% <98.70%> (+1.14%)	⬆️

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