- Update Board class, add isBoardFull method to return true if board is full, and false otherwise.
- Update Run class, to exit if board is full.
- Update Board class, add signature of mergeLeft, mergeRight, mergeTop, mergeDown methods.
- Update Run class, call proper merge method on board object.
- Update Board class, implement mergeLeft method to merge tiles.
- Update Board class, implement mergeRight method to merge tiles.
- Update Board class, implement mergeTop method to merge tiles.
- Update Board class, implement mergeDown method to merge tiles.
- Update Board class, increment score variable accordingly when mergeLeft method merges 2 tiles.
- Update Board class, increment score variable accordingly when mergeRight method merges 2 tiles.
- Update Board class, increment score variable accordingly when mergeTop method merges 2 tiles.
- Update Board class, increment score variable accordingly when mergeDown method merges 2 tiles.
- Update Test class, add testMergeLeft method to test mergeLeft method in Board class.
- Update Test class, add testMergeRight method to test mergeRight method in Board class.
- Update Test class, add testMergeTop method to test mergeTop method in Board class.
- Update Test class, add testMergeDown method to test mergeDown method in Board class.