def test_reset_the_counter_and_move_piece_down(self):
p = PlayerArea()
p.current_piece = Piece()
p.drop_counter = 0
x_before = p.current_x
y_before = p.current_y
p.tick()
self.assertEqual(p.drop_counter, p.ticks_per_drop)
self.assertEqual(p.current_x, x_before)
self.assertEqual(p.current_y, y_before + 1)
def test_resetting_the_current_x_and_y_on_new_piece(self):
"""
When a new piece is activated, the initial position should be reset to the
top-center of the grid.
"""
p = PlayerArea()
p.current_piece = None
p.current_y = 15
p.current_x = 7
p.tick()
self.assertEqual(p.current_x, p.INITIAL_X)
self.assertEqual(p.current_y, p.INITIAL_Y)
def test_attaching_piece_to_bottom_of_grid(self):
p = PlayerArea()
p.current_piece = Piece(Piece.BLOCK_SHAPE)
p.current_y = 18
p.current_x = p.INITIAL_X
p.drop_counter = 0
p.tick()
self.assertIsNone(p.current_piece)
for row in (18, 19):
for col in (4, 5):
index = (row * PlayerArea.GRID_COLUMNS) + col
self.assertNotEqual(p.grid[index], 0)
def test_set_current_piece_if_null_on_tick(self):
"""
The current piece is the shape that the player moves around on the grid.
If there is no piece set, it could mean that the game has just begun or
that the current piece collided last round and was cemented onto the grid.
In this case, the next_piece field becomes the current_piece and a new
next_piece object is randomly generated. The drop counter should also be
reset.
"""
p = PlayerArea()
piece = Piece(Piece.BLOCK_SHAPE)
p.current_piece = None
p.next_piece = piece
p.tick()
self.assertEqual(p.current_piece, piece)
self.assertEqual(p.drop_counter, p.ticks_per_drop)
self.assertIsNotNone(p.next_piece)
self.assertNotEqual(p.next_piece, piece)
def test_decrementing_drop_counter(self):
"""
A counter is used to determine when the current piece should drop
down by a row. The counter should be decremented every tick, but
the piece should not drop unless it hits zero. Verify that the counter
is decremented and that the x and y coordinates of the piece do not
change.
"""
p = PlayerArea()
p.current_piece = Piece()
drop_counter_before = p.drop_counter
self.assertTrue(drop_counter_before > 0)
x_before = p.current_x
y_before = p.current_y
p.tick()
self.assertEqual(p.drop_counter, drop_counter_before - 1)
self.assertEqual(p.current_x, x_before)
self.assertEqual(p.current_y, y_before)