Tests 1-6: rooms DO NOT touch each other
Tests 7-10: rooms DO touch each other

Moreover,
Test 1: minitest
Tests 2, 3: tests like n*3, 3*m
Test 4: quite random thought, looks like smile :)
Test 5: big empty room
Test 6: quite random again, looks like traffic lights
Test 7: ton of touching small rooms 1*1
Tests 8-10: just some big "random thought"-tests. Again full of contacts.