first test passed
first test passed
second test passed
second test passed
created and passed test 'it can be full'
created and passed test 'it can be full'
added and passed test 'will not be empty if a plane is landed'
added and passed test 'will not be full if a plane takes off'
added and passed test 'will not be full if a plane takes off'
passed test 'a plane cannot land if the airport is full'