ADD: create t1
add: t1 answer
MOD: add testcase
MOD: testcase
MOD: extract method
change order of methods
ADD t2
tdd to answer
ADD: the question t3
tdd for t3
move data class to inner class
MOD: rename package
add t4
tdd to answer t4
remove useless null
tdd: fibonacci
move to old
add runnable test