import array import math import struct import pytest from PIL import Image, ImagePath def test_path(): p = ImagePath.Path(list(range(10))) # sequence interface assert len(p) == 5 assert p[0] == (0.0, 1.0) assert p[-1] == (8.0, 9.0) assert list(p[:1]) == [(0.0, 1.0)] with pytest.raises(TypeError) as cm: p["foo"] assert str(cm.value) == "Path indices must be integers, not str" assert list(p) == [(0.0, 1.0), (2.0, 3.0), (4.0, 5.0), (6.0, 7.0), (8.0, 9.0)] # method sanity check assert p.tolist() == [ (0.0, 1.0), (2.0, 3.0), (4.0, 5.0), (6.0, 7.0), (8.0, 9.0), ] assert p.tolist(1) == [0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0] assert p.getbbox() == (0.0, 1.0, 8.0, 9.0) assert p.compact(5) == 2 assert list(p) == [(0.0, 1.0), (4.0, 5.0), (8.0, 9.0)] p.transform((1, 0, 1, 0, 1, 1)) assert list(p) == [(1.0, 2.0), (5.0, 6.0), (9.0, 10.0)] # alternative constructors p = ImagePath.Path([0, 1]) assert list(p) == [(0.0, 1.0)] p = ImagePath.Path([0.0, 1.0]) assert list(p) == [(0.0, 1.0)] p = ImagePath.Path([0, 1]) assert list(p) == [(0.0, 1.0)] p = ImagePath.Path([(0, 1)]) assert list(p) == [(0.0, 1.0)] p = ImagePath.Path(p) assert list(p) == [(0.0, 1.0)] p = ImagePath.Path(p.tolist(0)) assert list(p) == [(0.0, 1.0)] p = ImagePath.Path(p.tolist(1)) assert list(p) == [(0.0, 1.0)] p = ImagePath.Path(array.array("f", [0, 1])) assert list(p) == [(0.0, 1.0)] arr = array.array("f", [0, 1]) if hasattr(arr, "tobytes"): p = ImagePath.Path(arr.tobytes()) else: p = ImagePath.Path(arr.tostring()) assert list(p) == [(0.0, 1.0)] def test_invalid_coords(): # Arrange coords = ["a", "b"] # Act / Assert with pytest.raises(SystemError): ImagePath.Path(coords) def test_path_odd_number_of_coordinates(): # Arrange coords = [0] # Act / Assert with pytest.raises(ValueError) as e: ImagePath.Path(coords) assert str(e.value) == "wrong number of coordinates" @pytest.mark.parametrize( "coords, expected", [ ([0, 1, 2, 3], (0.0, 1.0, 2.0, 3.0)), ([3, 2, 1, 0], (1.0, 0.0, 3.0, 2.0)), ], ) def test_getbbox(coords, expected): # Arrange p = ImagePath.Path(coords) # Act / Assert assert p.getbbox() == expected def test_getbbox_no_args(): # Arrange p = ImagePath.Path([0, 1, 2, 3]) # Act / Assert with pytest.raises(TypeError): p.getbbox(1) @pytest.mark.parametrize( "coords, expected", [ (0, []), (list(range(6)), [(0.0, 3.0), (4.0, 9.0), (8.0, 15.0)]), ], ) def test_map(coords, expected): # Arrange p = ImagePath.Path(coords) # Act # Modifies the path in-place p.map(lambda x, y: (x * 2, y * 3)) # Assert assert list(p) == expected def test_transform(): # Arrange p = ImagePath.Path([0, 1, 2, 3]) theta = math.pi / 15 # Act # Affine transform, in-place p.transform( (math.cos(theta), math.sin(theta), 20, -math.sin(theta), math.cos(theta), 20), ) # Assert assert p.tolist() == [ (20.20791169081776, 20.978147600733806), (22.58003027392089, 22.518619420565898), ] def test_transform_with_wrap(): # Arrange p = ImagePath.Path([0, 1, 2, 3]) theta = math.pi / 15 # Act # Affine transform, in-place, with wrap parameter p.transform( (math.cos(theta), math.sin(theta), 20, -math.sin(theta), math.cos(theta), 20), 1.0, ) # Assert assert p.tolist() == [ (0.20791169081775962, 20.978147600733806), (0.5800302739208902, 22.518619420565898), ] def test_overflow_segfault(): # Some Pythons fail getting the argument as an integer, and it falls # through to the sequence. Seeing this on 32-bit Windows. with pytest.raises((TypeError, MemoryError)): # post patch, this fails with a memory error x = evil() # This fails due to the invalid malloc above, # and segfaults for i in range(200000): x[i] = b"0" * 16 class evil: def __init__(self): self.corrupt = Image.core.path(0x4000000000000000) def __getitem__(self, i): x = self.corrupt[i] return struct.pack("dd", x[0], x[1]) def __setitem__(self, i, x): self.corrupt[i] = struct.unpack("dd", x)