Test adaptive localization with cut-off 0 and 1

[kvashchuka]

Issue
Resolves #6223, resolves #6222

Approach
Short description of the approach

(Screenshot of new behavior in GUI if applicable)

Pre review checklist

• Read through the code changes carefully after finishing work
• Make sure tests pass locally (after every commit!)
• Prepare changes in small commits for more convenient review (optional)
• PR title captures the intent of the changes, and is fitting for release notes.
• Updated documentation
• Ensured that unit tests are added for all new behavior (See
  Ground Rules),
  and changes to existing code have good test coverage.

Pre merge checklist

• Added appropriate release note label
• Commit history is consistent and clean, in line with the contribution guidelines.

[dafeda]

I find these tests to be very easy to read and understand. 👍
Good if @oyvindeide takes a look as well I think.

[codecov-commenter]

Codecov Report

Merging #6318 (c437e48) into localization (270170c) will decrease coverage by 0.96%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           localization    #6318      +/-   ##
================================================
- Coverage         83.66%   82.70%   -0.96%     
================================================
  Files               342      347       +5     
  Lines             20826    21457     +631     
  Branches            862      862              
================================================
+ Hits              17424    17746     +322     
- Misses             3103     3413     +310     
+ Partials            299      298       -1     

see 12 files with indirect coverage changes

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