[MAINT] add test to resampling_target = None for nifti label maskers

[Remi-Gau]

• Closes none but follow up on [MAINT] Refactor test nifti label maskers #4333

Changes proposed in this pull request:

• add match argument to test of errors
• add explicit test of resampling_target=None
• simplify some variable names that were made too complicated after splitting long tests in [MAINT] Refactor test nifti label maskers #4333

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.07%. Comparing base (abb80ff) to head (5b462ef).
Report is 36 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4336      +/-   ##
==========================================
+ Coverage   91.85%   92.07%   +0.21%     
==========================================
  Files         144      143       -1     
  Lines       16419    16496      +77     
  Branches     3434     3463      +29     
==========================================
+ Hits        15082    15189     +107     
+ Misses        792      764      -28     
+ Partials      545      543       -2     

Flag	Coverage Δ
macos-latest_3.11_test_plotting	91.94% <ø> (+0.09%)	⬆️
macos-latest_3.12_test_plotting	91.94% <ø> (?)
macos-latest_3.8_test_plotting	91.91% <ø> (?)
ubuntu-latest_3.10_test_plotting	91.94% <ø> (+0.09%)	⬆️
ubuntu-latest_3.11_test_plotting	91.94% <ø> (?)
ubuntu-latest_3.12_test_plotting	91.94% <ø> (?)
ubuntu-latest_3.8_test_plot_min	91.61% <ø> (?)
ubuntu-latest_3.8_test_plotting	91.91% <ø> (?)
ubuntu-latest_3.9_test_plotting	91.91% <ø> (?)
windows-latest_3.10_test_plotting	91.92% <ø> (?)
windows-latest_3.11_test_plotting	91.92% <ø> (?)
windows-latest_3.12_test_plotting	91.92% <ø> (?)
windows-latest_3.8_test_plotting	91.88% <ø> (?)

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[bthirion]

Looks good so far.

[man-shu]

Looks good to me too!

[Remi-Gau]

Okidoo. Thanks for the reviews to both. Merging.