🔨 🚜 refactored tests

[chfw]

• have you written unit tests for your code changes?
• have you updated the change log?
• can someone else understand your changes without your explanation?
• are you pround of your code changes?
• please add your name and github link to contributors.rst in alphabetical order.

[codecov-io]

Codecov Report

Merging #317 into dev will decrease coverage by 2.52%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              dev     #317      +/-   ##
==========================================
- Coverage   97.89%   95.36%   -2.53%     
==========================================
  Files          62       50      -12     
  Lines        2892     2504     -388     
==========================================
- Hits         2831     2388     -443     
- Misses         61      116      +55

Impacted Files	Coverage Δ
tests/utils.py	100% <100%> (ø)
tests/test_docs.py	100% <100%> (ø)	⬆️
tests/test_regression.py	100% <100%> (+20.58%)	⬆️
tests/test_copy_engine.py	100% <100%> (ø)	⬆️
moban/jinja2/filters/text.py	18.18% <0%> (-81.82%)	⬇️
moban/jinja2/filters/github.py	32.35% <0%> (-67.65%)	⬇️
moban/jinja2/filters/repr.py	50% <0%> (-50%)	⬇️
moban/core/moban_factory.py	89.04% <0%> (-10.28%)	⬇️
moban/deprecated/__init__.py	88.37% <0%> (-8.14%)	⬇️
moban/utils.py	92.85% <0%> (-3.58%)	⬇️
... and 3 more

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