Create functional tests where arguments are given, use a parameterized test. testSimpleInit(size): the first constructor works as expected. getTiles shows suitable values. The edges of the board (the smallest and biggest conceivable values) are accessible and contain the values that they have to (BASE_TILE_SCORE). testCustomInit(x, y, expected): the second constructor works as expected. On positions where values smaller than three were passed, the board contains the value BASE_TILE_SCORE. If you pass an array to the constructor and later modify a value in it, the respective tile retains the originally passed value. If you modify an element in the return value of getTiles(), and get the value of the respective tile again, this newly received content has to be the originally set value. testMoves(): take four or five steps and check that the board’s contents are changed just right. Include a step that tries to move to the x coordinate Integer.MIN_VALUE and another one that moves to the y coordinate 666. Include a step that tries to move outside of the board. In this case, check that both the position and the board’s contents are unchanged. public class WalkingBoard { privateint[][] tiles; //getter method bhgu privateintx; privateinty; publicstaticfinalintBASE_TILE_SCORE=3; publicWalkingBoard(intsize) { this.tiles=newint[size][size]; for (inti=0; i < size; i++) { for (intj=0; j < size; j++) { this.tiles[i][j] = BASE_TILE_SCORE;} } this.x=0; this.y=0; } publicWalkingBoard(int[][] tiles) { this.x=0; this.y=0; int[][] copy=newint[tiles.length][]; for (inti=0; i <tiles.length; i++) { introwLength= tiles[i].length; copy[i] = new int[rowLength]; for (intj=0; j < rowLength; j++) { copy[i][j] = Math.max(this.BASE_TILE_SCORE, tiles[i][j]); } } this.tiles= copy; } publicint[] getPosition() { returnnewint[]{x, y}; } publicbooleanisValidPosition(intx, inty) { return x >=0&& x <tiles.length&& y >=0&& y < tiles[0].length; //indexing - tiles 0;; tiles[0].length--> how to do it if uniform } publicintgetTile(intx, inty) { if (isValidPosition(x, y)) { return tiles[x][y]; } elsethrownewIllegalArgumentException("Invalid Position"); } publicint[][] getTiles(){ int[][] copy=newint[tiles.length][]; for (inti=0; i <tiles.length; i++) { introwLength= tiles[i].length; copy[i] = new int[rowLength]; for (intj=0; j < rowLength; j++) { copy[i][j] = tiles[i][j]; } } return copy; } publicstaticintgetXStep(Directiondirection) { switch (direction) { case UP: return1; case DOWN: return-1; case RIGHT: return0; case LEFT: return-0; default: thrownewIllegalArgumentException("Invalid direction"); } } publicstaticintgetYStep(Directiondirection) { switch (direction) { case UP: return0; case DOWN: return0; case RIGHT: return1; case LEFT: return-1; default: thrownewIllegalArgumentException("Invalid direction"); } } publicintmoveAndSet(Directiondirection, intvalue) { intnewX= x +getXStep(direction); intnewY= y +getYStep(direction); if (newX <0|| newX >=tiles.length|| newY <0|| newY >= tiles[newX].length) { return0; } else { x = newX; y = newY; intoldValue= tiles[x][y]; tiles[x][y] = value; return oldValue; } } publicintsetAndMove(Directiondirection, intvalue) { tiles[x][y] = value; intnewX= x +getXStep(direction); intnewY= y +getYStep(direction); if (newX <0|| newX >=tiles.length|| newY <0|| newY >= tiles[newX].length) { return0; } else { x = newX; y = newY; return tiles[x][y]; } } }

Related questions

• testSimpleInit(size): the first constructor works as expected.
• getTiles shows suitable values.
• The edges of the board (the smallest and biggest conceivable values) are accessible and contain the values that they have to (BASE_TILE_SCORE).
• testCustomInit(x, y, expected): the second constructor works as expected.
• On positions where values smaller than three were passed, the board contains the value BASE_TILE_SCORE.
• If you pass an array to the constructor and later modify a value in it, the respective tile retains the originally passed value.
• If you modify an element in the return value of getTiles(), and get the value of the respective tile again, this newly received content has to be the originally set value.
• testMoves(): take four or five steps and check that the board’s contents are changed just right.
• Include a step that tries to move to the x coordinate Integer.MIN_VALUE and another one that moves to the y coordinate 666.
• Include a step that tries to move outside of the board. In this case, check that both the position and the board’s contents are unchanged.