The mower can now turn to left
Mower can now advance and turn right
Use parameterized tests as all tests have the same structure
Test refactoring for best readibility
Mower can now advance, turn to left and turn to right
Mower takes now into account the ground limits
The mower can now move several times
fix: a 5,5 ground can be explored from 0 to 5 and not from 0 to 4