Create mock Strategy class.
Add attribute strategy_.
Modify Player test.
GetTimestamp is now const. Add doc.
Add method GetCharacter.
Implement movement.
Change type of parameter game_engine.
Implement methods.
Remove unused include.
Correct include.
Correct unused paramaters.
Correct test.
Add assert in AddFireFromAtoB.
rename maxDuration to max_duration_
Add is_running_
Add method AddFire.
Typo.
Add TODO.
Add TODO add warning message.
DistanceBetween is now static.