Be a bit more precise
Ideally, a test_category can go from combobox, but as long as there's no one - just hardcode its id.
Make `$TEST_ID` accesible outside this package, to have an ability to get it in tests.
Ability to associate a word with a test category
Num is a floating point number
Add an initial version of the test for PrepositionTest
Test `_reset_attributes` method