def test_for_very_short_line_segments(self, start, delta):
path = Path((start, 0, 0))
path.line_to((start + delta, 0, 0))
path = lines_to_curve4(path)
assert len(path) == 1
assert path[0].type == Command.CURVE4_TO
assert len(list(path.flattening(1))) > 3
def test_which_length_is_too_short_to_create_a_curve(self, start, delta):
path = Path((start, 0, 0))
path.line_to((start + delta, 0, 0))
path = lines_to_curve4(path)
assert len(path) == 1
assert (
path[0].type == Command.LINE_TO
), "should not remove a single line segment representing a point"
assert len(list(path.flattening(1))) == 2
def test_remove_line_segments_of_zero_length_at_the_end(self):
# CURVE3_TO and CURVE4_TO can not process zero length segments
path = Path()
path.line_to((1, 0))
path.line_to((1, 0)) # line segment of length==0 should be removed
path = lines_to_curve4(path)
assert len(path) == 1
assert path.start == (0, 0)
assert path[0].type == Command.CURVE4_TO
assert path[0].end == (1, 0)
def test_does_not_remove_a_line_representing_a_single_point(self):
path = Path((1, 0))
path.line_to((1, 0)) # represents the point (1, 0)
path = lines_to_curve4(path)
assert len(path) == 1
assert path[0].type == Command.LINE_TO
def test_create_a_curve4_command(self):
path = Path()
path.line_to((1, 0))
path = lines_to_curve4(path)
assert path[0].type == Command.CURVE4_TO