def test_canvas_undo_draw_line():
canvas = Canvas(10, 10)
line1 = Line(Point(0, 2), Point(9, 2))
canvas.draw_line(line1)
expected_cells_after_undo = deepcopy(canvas.cells)
line2 = Line(Point(0, 5), Point(9, 5))
canvas.draw_line(line2)
canvas.undo()
assert canvas.cells == expected_cells_after_undo
def test_canvas_draw_line_vertical():
canvas = Canvas(50, 50)
from_point = Point(3, 3)
to_point = Point(3, 35)
line = Line(from_point, to_point)
canvas.draw_line(line)
for point in line.get_points():
assert canvas.cells[point.x][point.y] == (CanvasCellContentType.Line,
'x')
def test_line_get_points_for_vertical_line():
from_point = Point(1, 1)
to_point = Point(5, 1)
expected_points = [
from_point,
Point(2, 1),
Point(3, 1),
Point(4, 1), to_point
]
line = Line(from_point, to_point)
points = line.get_points()
assert points == expected_points
def test_line_get_points_for_horizontal_line():
from_point = Point(1, 1)
to_point = Point(1, 5)
expected_points = [
from_point,
Point(1, 2),
Point(1, 3),
Point(1, 4), to_point
]
line = Line(from_point, to_point)
points = line.get_points()
assert points == expected_points
def test_canvas_draw_line_fails_when_a_point_is_out_of_bounds():
canvas = Canvas(50, 50)
from_point1 = Point(3, 3)
to_point1 = Point(3, 350)
line1 = Line(from_point1, to_point1)
with pytest.raises(OutOfCanvasBoundError):
canvas.draw_line(line1)
from_point2 = Point(3, 300)
to_point2 = Point(3, 35)
line2 = Line(from_point2, to_point2)
with pytest.raises(OutOfCanvasBoundError):
canvas.draw_line(line2)
def test_rectangle_get_lines():
top_right = Point(1, 1)
top_left = Point(5, 1)
bottom_left = Point(5, 5)
bottom_right = Point(1, 5)
rectangle = Rectangle(top_left, bottom_right)
expected_lines = [
Line(top_left, top_right),
Line(top_left, bottom_left),
Line(top_right, bottom_right),
Line(bottom_left, bottom_right)
]
lines = rectangle.get_lines()
assert lines == expected_lines
def test_canvas_bucket_fill_shape():
width, height = 10, 10
canvas = Canvas(width, height)
line = Line(Point(0, 1), Point(9, 1))
canvas.draw_line(line)
canvas.bucket_fill(Point(0, 1), 'o')
#line has been filled
for point in line.get_points():
assert canvas.cells[point.x][point.y] == (CanvasCellContentType.Line,
'o')
#rest have not been filled
for x in range(width):
for y in range(height):
if Point(x, y) not in line.get_points():
assert canvas.cells[x][y] == (CanvasCellContentType.Empty, ' ')
def test_canvas_delete_shape():
canvas = Canvas(10, 10)
line = Line(Point(0, 1), Point(9, 1))
expected_cells_after_delete = deepcopy(canvas.cells)
canvas.draw_line(line)
canvas.delete(Point(0, 1))
assert canvas.cells == expected_cells_after_delete
def test_draw_line_command_execute():
canvas = Mock(spec=Canvas)
command = DrawLineCommand(lambda: canvas)
x1, y1, x2, y2 = 1, 1, 1, 10
line = Line(Point(x1, y1), Point(x2, y2))
command.execute(x1, y1, x2, y2)
canvas.draw_line.assert_called_once_with(line)
def test_canvas_undo_bucket_fill():
canvas = Canvas(10, 10)
line = Line(Point(0, 2), Point(9, 2))
canvas.draw_line(line)
expected_cells_after_undo = deepcopy(canvas.cells)
canvas.bucket_fill(Point(0, 0), 'o')
canvas.undo()
assert canvas.cells == expected_cells_after_undo
def test_canvas_bucket_fill_area():
width, height = 10, 10
canvas = Canvas(width, height)
line = Line(Point(0, 2), Point(9, 2))
canvas.draw_line(line)
canvas.bucket_fill(Point(0, 0), 'o')
#top area have been filled
for x in range(width):
assert (canvas.cells[x][0] == (CanvasCellContentType.Empty, 'o')
and canvas.cells[x][1] == (CanvasCellContentType.Empty, 'o'))
#bottom area have not been filled
for y in range(3, height):
assert canvas.cells[x][y] == (CanvasCellContentType.Empty, ' ')
#line have not been filled
for point in line.get_points():
assert canvas.cells[point.x][point.y] == (CanvasCellContentType.Line,
'x')
def test_canvas_undo_draw_rectangle():
canvas = Canvas(10, 10)
line = Line(Point(0, 2), Point(9, 2))
canvas.draw_line(line)
expected_cells_after_undo = deepcopy(canvas.cells)
rectangle = Rectangle(Point(1, 1), Point(3, 3))
canvas.draw_rectangle(rectangle)
canvas.undo()
assert canvas.cells == expected_cells_after_undo
def test_canvas_delete_colour():
width, height = 10, 10
canvas = Canvas(width, height)
line = Line(Point(0, 1), Point(9, 1))
canvas.draw_line(line)
expected_cells_after_delete = deepcopy(canvas.cells)
canvas.bucket_fill(Point(0, 0), 'o')
canvas.delete(Point(0, 0))
assert canvas.cells == expected_cells_after_delete
def test_canvas_str():
expected_canvas_str = (" ----- "
"\n"
"| |"
"\n"
"|xxxxx|"
"\n"
"|ooooo|"
"\n"
"|xxxxx|"
"\n"
"| |"
"\n"
" ----- ")
canvas = Canvas(5, 5)
canvas.draw_line(Line(Point(0, 1), Point(4, 1)))
canvas.draw_line(Line(Point(0, 3), Point(4, 3)))
canvas.bucket_fill(Point(2, 2), 'o')
assert str(canvas) == expected_canvas_str
def execute(self, *args):
#pylint: disable=invalid-name
"""
Draw a line on the canvas
Args:
x1, y1, x2, y2:
the int coordinates of (x1, y1) and (x2, y2) between which the line will be drawn
"""
if len(args) < 4:
raise ValueError("4 arguments expected (x1, y1, x2, y2)")
x1, y1, x2, y2 = args[0], args[1], args[2], args[3]
line = Line(Point(x1, y1), Point(x2, y2))
self.get_canvas_fn().draw_line(line)
def test_line_initialize():
point1 = Point(1, 1)
point2 = Point(5, 1)
line = Line(point1, point2)
assert line.from_point == point1 and line.to_point == point2
