[FIX] Test & Score: Instantly recognize new input

[jerneju]

Issue

#1842

Description of changes

Includes

• Code changes
• Tests
• Documentation

[codecov-io]

Codecov Report

Merging #2219 into master will increase coverage by 0.99%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2219      +/-   ##
==========================================
+ Coverage   71.18%   72.17%   +0.99%     
==========================================
  Files         318      318              
  Lines       54765    54765              
==========================================
+ Hits        38983    39526     +543     
+ Misses      15782    15239     -543

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[janezd]

This will call _invalidate twice - first from set_train_data and then from handleNewSignals. As a consequence, cross-validation (or whatever testing) is run twice for each change of train or test data.

Connect Random forest to Test and Score and set it to induce 100 trees. Then feed brown-selected data to Test and Score and observe what happens.

[jerneju]

Well I see. I changed the code, may I reopen or open new PR?

[janezd]

As you like. I closed it since it was just a single line, so opening a new PR is as costly as keeping this one.