def test_for_graph_with_two_disconnected_nodes_returns_empty(self):
result = shortest_path_with_direction(graph={
0:
Node(position=Point(0, 0), arcs=[]),
1:
Node(position=Point(1, 0), arcs=[]),
},
src=0,
dst=1,
initial_direction=Point(1, 0),
forbidden={})
assert_that(list(result), equal_to([]))
def test_for_graph_with_one_node_with_arc_returns_empty(self):
result = shortest_path_with_direction(
graph={0: Node(position=Point(0, 0), arcs=[Arc(dst=0, weight=1)])},
src=0,
dst=0,
initial_direction=Point(1, 0),
forbidden={})
assert_that(list(result), equal_to([]))
def test_for_two_double_connected_nodes_returns_with_three_nodes(self):
result = split_arcs(
graph={
0: Node(position=Point(0, 0), arcs=[Arc(dst=1, weight=1)]),
1: Node(position=Point(0, 1), arcs=[Arc(dst=0, weight=1)]),
})
assert_that(
result,
equal_to({
0:
Node(position=Point(0, 0), arcs=[Arc(dst=2, weight=0.5)]),
1:
Node(position=Point(0, 1), arcs=[Arc(dst=2, weight=0.5)]),
2:
Node(position=Point(0, 0.5),
arcs=[Arc(dst=0, weight=0.5),
Arc(dst=1, weight=0.5)]),
}))
def test_for_quadrant_from_left_top_to_right_top_with_direction_to_bottom_returns_path_direct_to_right_top(
self):
result = shortest_path_with_direction(graph={
0:
Node(position=Point(0, 0),
arcs=[Arc(dst=1, weight=1),
Arc(dst=2, weight=1)]),
1:
Node(position=Point(0, 1), arcs=[Arc(dst=3, weight=1)]),
2:
Node(position=Point(1, 0), arcs=[]),
3:
Node(position=Point(1, 1), arcs=[Arc(dst=2, weight=1)]),
},
src=0,
dst=2,
initial_direction=Point(0, 1),
forbidden={})
assert_that(list(result), equal_to([2]))
def test_for_two_horizontal_between_empty(self):
result = make_graph(tiles=[
[TileType.EMPTY],
[TileType.HORIZONTAL],
[TileType.HORIZONTAL],
[TileType.EMPTY],
], )
assert_that(
result,
equal_to({
0:
Node(position=Point(0, 0), arcs=[]),
1:
Node(position=Point(1, 0),
arcs=[Arc(dst=0, weight=1),
Arc(dst=2, weight=1)]),
2:
Node(position=Point(2, 0),
arcs=[Arc(dst=1, weight=1),
Arc(dst=3, weight=1)]),
3:
Node(position=Point(3, 0), arcs=[]),
}))
def test_for_two_vertical_between_empty(self):
result = make_graph(tiles=[
[
TileType.EMPTY, TileType.VERTICAL, TileType.VERTICAL,
TileType.EMPTY
],
], )
assert_that(
result,
equal_to({
0:
Node(position=Point(0, 0), arcs=[]),
1:
Node(position=Point(0, 1),
arcs=[Arc(dst=0, weight=1),
Arc(dst=2, weight=1)]),
2:
Node(position=Point(0, 2),
arcs=[Arc(dst=1, weight=1),
Arc(dst=3, weight=1)]),
3:
Node(position=Point(0, 3), arcs=[]),
}))
def test_for_graph_2(self):
result = shortest_path_with_direction(graph={
0:
Node(position=Point(0, 1),
arcs=[Arc(dst=1, weight=1),
Arc(dst=2, weight=1)]),
1:
Node(position=Point(0, 0), arcs=[Arc(dst=3, weight=1)]),
2:
Node(position=Point(0, 2), arcs=[Arc(dst=4, weight=1)]),
3:
Node(position=Point(1, 0), arcs=[Arc(dst=5, weight=1)]),
4:
Node(position=Point(1, 2), arcs=[Arc(dst=6, weight=1)]),
5:
Node(position=Point(1, 1), arcs=[Arc(dst=6, weight=1)]),
6:
Node(position=Point(2, 2), arcs=[]),
},
src=0,
dst=6,
initial_direction=Point(1, 1),
forbidden={})
assert_that(list(result), equal_to([2, 4, 6]))
def test_for_graph_with_two_alternatives_with_initial_direction_to_right_top_returns_over_top(
self):
result = shortest_path_with_direction(graph={
0:
Node(position=Point(0, 1),
arcs=[Arc(dst=1, weight=1),
Arc(dst=2, weight=1)]),
1:
Node(position=Point(0, 0), arcs=[Arc(dst=3, weight=1)]),
2:
Node(position=Point(0, 2), arcs=[Arc(dst=4, weight=1)]),
3:
Node(position=Point(1, 0), arcs=[Arc(dst=5, weight=1)]),
4:
Node(position=Point(1, 2), arcs=[Arc(dst=5, weight=1)]),
5:
Node(position=Point(1, 1), arcs=[]),
},
src=0,
dst=5,
initial_direction=Point(1, 1),
forbidden={})
assert_that(list(result), equal_to([2, 4, 5]))
def test_for_split_quadrant_from_left_top_to_right_bottom_add_eight_new_arcs(
self):
result = add_diagonal_arcs(
graph={
0:
Node(position=Point(x=0, y=0),
arcs=[Arc(dst=4, weight=0.5),
Arc(dst=5, weight=0.5)]),
1:
Node(position=Point(x=0, y=1),
arcs=[Arc(dst=4, weight=0.5),
Arc(dst=6, weight=0.5)]),
2:
Node(position=Point(x=1, y=0),
arcs=[Arc(dst=5, weight=0.5),
Arc(dst=7, weight=0.5)]),
3:
Node(position=Point(x=1, y=1),
arcs=[Arc(dst=6, weight=0.5),
Arc(dst=7, weight=0.5)]),
4:
Node(position=Point(x=0.0, y=0.5),
arcs=[Arc(dst=0, weight=0.5),
Arc(dst=1, weight=0.5)]),
5:
Node(position=Point(x=0.5, y=0.0),
arcs=[Arc(dst=0, weight=0.5),
Arc(dst=2, weight=0.5)]),
6:
Node(position=Point(x=0.5, y=1.0),
arcs=[Arc(dst=1, weight=0.5),
Arc(dst=3, weight=0.5)]),
7:
Node(position=Point(x=1.0, y=0.5),
arcs=[Arc(dst=2, weight=0.5),
Arc(dst=3, weight=0.5)]),
})
assert_that(
result,
equal_to({
0:
Node(position=Point(x=0, y=0),
arcs=[Arc(dst=4, weight=0.5),
Arc(dst=5, weight=0.5)]),
1:
Node(position=Point(x=0, y=1),
arcs=[Arc(dst=4, weight=0.5),
Arc(dst=6, weight=0.5)]),
2:
Node(position=Point(x=1, y=0),
arcs=[Arc(dst=5, weight=0.5),
Arc(dst=7, weight=0.5)]),
3:
Node(position=Point(x=1, y=1),
arcs=[Arc(dst=6, weight=0.5),
Arc(dst=7, weight=0.5)]),
4:
Node(position=Point(x=0.0, y=0.5),
arcs=[
Arc(dst=0, weight=0.5),
Arc(dst=1, weight=0.5),
Arc(dst=5, weight=pi / 2 / 2),
Arc(dst=6, weight=pi / 2 / 2)
]),
5:
Node(position=Point(x=0.5, y=0.0),
arcs=[
Arc(dst=0, weight=0.5),
Arc(dst=2, weight=0.5),
Arc(dst=4, weight=pi / 2 / 2),
Arc(dst=7, weight=pi / 2 / 2)
]),
6:
Node(position=Point(x=0.5, y=1.0),
arcs=[
Arc(dst=1, weight=0.5),
Arc(dst=3, weight=0.5),
Arc(dst=4, weight=pi / 2 / 2),
Arc(dst=7, weight=pi / 2 / 2)
]),
7:
Node(position=Point(x=1.0, y=0.5),
arcs=[
Arc(dst=2, weight=0.5),
Arc(dst=3, weight=0.5),
Arc(dst=5, weight=pi / 2 / 2),
Arc(dst=6, weight=pi / 2 / 2)
]),
}))
def test_for_quadrant_from_left_top_to_right_bottom_returns_with_new_four_nodes(
self):
result = split_arcs(
graph={
0:
Node(position=Point(0, 0),
arcs=[Arc(dst=1, weight=1),
Arc(dst=2, weight=1)]),
1:
Node(position=Point(0, 1), arcs=[Arc(dst=3, weight=1)]),
2:
Node(position=Point(1, 0), arcs=[Arc(dst=3, weight=1)]),
3:
Node(position=Point(1, 1), arcs=[]),
})
assert_that(
result,
equal_to({
0:
Node(position=Point(x=0, y=0),
arcs=[Arc(dst=4, weight=0.5),
Arc(dst=5, weight=0.5)]),
1:
Node(position=Point(x=0, y=1),
arcs=[Arc(dst=4, weight=0.5),
Arc(dst=6, weight=0.5)]),
2:
Node(position=Point(x=1, y=0),
arcs=[Arc(dst=5, weight=0.5),
Arc(dst=7, weight=0.5)]),
3:
Node(position=Point(x=1, y=1),
arcs=[Arc(dst=6, weight=0.5),
Arc(dst=7, weight=0.5)]),
4:
Node(position=Point(x=0.0, y=0.5),
arcs=[Arc(dst=0, weight=0.5),
Arc(dst=1, weight=0.5)]),
5:
Node(position=Point(x=0.5, y=0.0),
arcs=[Arc(dst=0, weight=0.5),
Arc(dst=2, weight=0.5)]),
6:
Node(position=Point(x=0.5, y=1.0),
arcs=[Arc(dst=1, weight=0.5),
Arc(dst=3, weight=0.5)]),
7:
Node(position=Point(x=1.0, y=0.5),
arcs=[Arc(dst=2, weight=0.5),
Arc(dst=3, weight=0.5)]),
}))
def test_for_graph_3(self):
result = shortest_path_with_direction(graph={
0:
Node(position=Point(0, 0), arcs=[]),
1:
Node(position=Point(0, 1), arcs=[Arc(dst=0, weight=1)]),
2:
Node(position=Point(0, 2), arcs=[Arc(dst=1, weight=1)]),
3:
Node(position=Point(0, 3), arcs=[Arc(dst=2, weight=1)]),
4:
Node(position=Point(0, 4), arcs=[Arc(dst=3, weight=1)]),
5:
Node(position=Point(0, 5), arcs=[Arc(dst=4, weight=1)]),
6:
Node(position=Point(1, 2), arcs=[Arc(dst=1, weight=pi / 2)]),
7:
Node(position=Point(1, 6), arcs=[Arc(dst=5, weight=pi / 2)]),
8:
Node(position=Point(2, 3), arcs=[Arc(dst=6, weight=pi / 2)]),
9:
Node(position=Point(2, 4), arcs=[Arc(dst=8, weight=1)]),
10:
Node(position=Point(2, 5), arcs=[Arc(dst=9, weight=1)]),
11:
Node(position=Point(2, 6), arcs=[Arc(dst=7, weight=1)]),
12:
Node(position=Point(3, 6),
arcs=[Arc(dst=10, weight=pi / 2),
Arc(dst=11, weight=1)]),
},
src=12,
dst=0,
initial_direction=Point(-1, 0),
forbidden={})
assert_that(list(result), equal_to([11, 7, 5, 4, 3, 2, 1, 0]))
