# coding=utf-8
"""
Test Inkex path parsing functionality.
"""

import re

from inkex.paths import (
    InvalidPath, Path, PathCommand, CubicSuperPath,
    line, move, curve, smooth, quadratic, tepidQuadratic, arc, vert, horz, zoneClose,
    Line, Move, Horz, Vert, Curve, Smooth, Quadratic, TepidQuadratic, Arc, ZoneClose
)
from inkex.transforms import Transform, Vector2d
from inkex.tester import TestCase


class SegmentTest(TestCase):
    """
    Test specific segment functionality.
    """

    def get_random_cmd(self, Cmd):
        import random
        return Cmd(*[random.randint(0, 10) for i in range(Cmd.nargs)])

    def test_equals(self):
        """Segments should be equalitive"""
        self.assertEqual(Move(10, 10), Move(10, 10))
        self.assertEqual(Line(10, 10), Line(10, 10))
        self.assertEqual(line(10, 10), line(10, 10))
        self.assertNotEqual(line(10, 10), Line(10, 10))
        self.assertEqual(Horz(10), Line(10, 0))
        self.assertEqual(Vert(10), Line(0, 10))
        self.assertNotEqual(Vert(10), Horz(10))

    def test_to_curves(self):
        """Segments can become curves"""
        self.assertRaises(ValueError, Move(0, 0).to_curve, None)
        self.assertEqual(Line(10, 10).to_curve(Vector2d(10, 5)), (10, 5, 10, 10, 10, 10))
        self.assertEqual(Horz(10).to_curve(Vector2d(10, 5)), (10, 5, 10, 5, 10, 5))
        self.assertEqual(Vert(10).to_curve(Vector2d(5, 10)), (5, 10, 5, 10, 5, 10))
        self.assertEqual(Curve(5, 5, 10, 10, 4, 4).to_curve(Vector2d(0, 0)), (5, 5, 10, 10, 4, 4))

        self.assertEqual(
            Smooth(10, 10, 4, 4).to_curve(Vector2d(4, 4), Vector2d(10, 10)),
            (-2, -2, 10, 10, 4, 4),
        )

        self.assertAlmostTuple(
            Quadratic(10, 10, 4, 4).to_curve(Vector2d(0, 0)).args,
            (6.666666666666666, 6.666666666666666, 8, 8, 4, 4),
        )

        self.assertAlmostTuple(
            TepidQuadratic(4, 4).to_curve(Vector2d(14, 19), Vector2d(11, 12)).args,
            #            (20.666666666666664, 30, 17.333333333333332, 25, 4, 4),
            (15.999999999999998, 23.666666666666664, 12.666666666666666, 18.666666666666664, 4, 4),
        )

        curves = list(Arc(50, 50, 0, 0, 1, 85, 85).to_curves(Vector2d(0, 0)))
        self.assertEqual(len(curves), 3)
        self.assertAlmostTuple(curves[0].args, (
            19.77590700610636, -5.4865851247611115, 38.18634924829132, -10.4196482558544, 55.44095225512604,
            -5.796291314453416))
        self.assertAlmostTuple(curves[1].args, (
            72.69555526196076, -1.172934373052433, 86.17293437305243, 12.30444473803924, 90.79629131445341,
            29.559047744873958))
        self.assertAlmostTuple(curves[2].args, (
            95.41964825585441, 46.81365075170867, 90.4865851247611, 65.22409299389365, 77.85533905932738,
            77.85533905932738))

        def apply_to_curve(obj):
            obj.to_curve(Vector2d())

        def apply_to_curves(obj):
            obj.to_curve(Vector2d())

        self.assertRaises(ValueError, apply_to_curve, ZoneClose())
        self.assertRaises(ValueError, apply_to_curves, zoneClose())

        self.assertRaises(ValueError, apply_to_curve, Move(0, 0))
        self.assertRaises(ValueError, apply_to_curves, move(0, 0))

    def test_transformation(self):
        t = Transform(matrix=((1, 2, 3), (4, 5, 6)))

        first = Vector2d()
        prev = Vector2d(31, 97)
        prev_prev = Vector2d(5, 7)

        for Cmd in (Line, Move, Curve, Smooth, Quadratic, TepidQuadratic, Arc):
            random_seg = self.get_random_cmd(Cmd)
            self.assertTrue(random_seg.transform(t) is not random_seg)  # transform returns copy
            self.assertEqual(random_seg.transform(t).name, Cmd.name)  # transform does not change Command type

            T = Transform()
            T.add_translate(10, 20)
            A = [ T.apply_to_point(p) for p in random_seg.control_points(first, prev, prev_prev) ]
            first2, prev2, prev_prev2 = (T.apply_to_point(p) for p in (first, prev, prev_prev))
            B = list(random_seg.translate(Vector2d(10, 20)).control_points(first2, prev2, prev_prev2))
            self.assertAlmostTuple(A, B)

            T = Transform()
            T.add_scale(10, 20)
            A = [ T.apply_to_point(p) for p in random_seg.control_points(first, prev, prev_prev) ]
            first2, prev2, prev_prev2 = (T.apply_to_point(p) for p in (first, prev, prev_prev))
            B = list(random_seg.scale((10, 20)).control_points(first2, prev2, prev_prev2))
            self.assertAlmostTuple(A, B)


            T = Transform()
            T.add_rotate(35, 15, 28)
            A = [ T.apply_to_point(p) for p in random_seg.control_points(first, prev, prev_prev) ]
            first2, prev2, prev_prev2 = (T.apply_to_point(p) for p in (first, prev, prev_prev))
            B = list(random_seg.rotate(35, Vector2d(15, 28)).control_points(first2, prev2, prev_prev2))
            self.assertAlmostTuple(A, B)



    def test_absolute_relative(self):
        absolutes = Line, Move, Curve, Smooth, Quadratic, TepidQuadratic, Arc, Vert, Horz, ZoneClose
        relatives = line, move, curve, smooth, quadratic, tepidQuadratic, arc, vert, horz, zoneClose

        zero = Vector2d()
        for R, A in zip(relatives, absolutes):
            rel = self.get_random_cmd(R)
            ab = self.get_random_cmd(A)

            self.assertTrue(rel.is_relative)
            self.assertTrue(ab.is_absolute)

            self.assertFalse(rel.is_absolute)
            self.assertFalse(ab.is_relative)

            self.assertEqual(type(rel.to_absolute(zero)), A)
            self.assertEqual(type(ab.to_relative(zero)), R)
            self.assertTrue(rel.to_relative(zero) is not rel)
            self.assertTrue(ab.to_absolute(zero) is not ab)

    def test_to_line(self):
        self.assertEqual(Vert(3).to_line(Vector2d(5, 11)), Line(5, 3))
        self.assertEqual(Horz(3).to_line(Vector2d(5, 11)), Line(3, 11))

        self.assertEqual(vert(3).to_line(Vector2d(5, 11)), Line(5, 14))
        self.assertEqual(horz(3).to_line(Vector2d(5, 11)), Line(8, 11))

    def test_args(self):

        commands = Line, Move, Curve, Smooth, Quadratic, TepidQuadratic, Arc, Vert, Horz, ZoneClose, \
              line, move, curve, smooth, quadratic, tepidQuadratic, arc, vert, horz, zoneClose

        for Cmd in commands:
            cmd = self.get_random_cmd(Cmd)
            self.assertEqual(len(cmd.args), cmd.nargs)
            self.assertEqual(Cmd(*cmd.args), cmd)



class PathTest(TestCase):
    """Test path API and calculations"""

    def _assertPath(self, path, want_string):
        """Test a normalized path string against a good value"""
        return self.assertEqual(re.sub('\\s+', ' ', str(path)), want_string)

    def test_new_empty(self):
        """Create a path from a path string"""
        self.assertEqual(str(Path()), '')

    def test_invalid(self):
        """Load an invalid path"""
        self._assertPath(Path('& 10 10 M 20 20'), 'M 20 20')
        self.assertRaises(TypeError, Line, [40, ])

    def test_copy(self):
        """Make a copy of a path"""
        self.assertEqual(str(Path('M 10 10').copy()), 'M 10 10')

    def test_repr(self):
        """Path representation"""
        self._assertPath(repr(Path('M 10 10 10 10')), "[Move(10, 10), Line(10, 10)]")

    def test_list(self):
        """Path of previous commands"""
        path = Path(Path('M 10 10 20 20 30 30 Z')[1:-1])
        self._assertPath(path, 'L 20 20 L 30 30')

    def test_passthrough(self):
        """Create a path and test the re-rendering of the commands"""
        for path in (
                'M 50,50 L 10,10 m 10 10 l 2.1,2',
                'm 150 150 c 10 10 6 6 20 10 L 10 10',
        ):
            self._assertPath(Path(path), path.replace(',', ' '))

    def test_chained_conversion(self):
        """Paths always extrapolate chained commands"""
        for path, ret in (
                ('M 100 100 20 20', 'M 100 100 L 20 20'),
                ('M 100 100 Z 20 20', 'M 100 100 Z M 20 20'),
                ('M 100 100 L 20 20 40 40 30 10 Z', 'M 100 100 L 20 20 L 40 40 L 30 10 Z'),
                ('m 50 50 l 20 20 40 40', 'm 50 50 l 20 20 l 40 40'),
                ('m 50 50 20 20', 'm 50 50 l 20 20'),
                ((('m', (50, 50)), ('l', (20, 20))), 'm 50 50 l 20 20'),
        ):
            self._assertPath(Path(path), ret)

    def test_create_from_points(self):
        """Paths can be made of simple list of tuples"""
        arg = ((10, 10), (4, 5), (16, -9), (20, 20))
        self.assertEqual(str(Path(arg)), 'L 10 10 L 4 5 L 16 -9 L 20 20')

    def test_control_points(self):
        """Test how x,y points are extracted"""
        for path, ret in (
                ('M 100 100', ((100, 100),)),
                ('L 100 100', ((100, 100),)),
                ('H 133', ((133, 0),)),
                ('V 144', ((0, 144),)),
                ('Q 40 20 12 99 T 100 100', ((40, 20), (12, 99), (-16, 178), (100, 100),)),
                ('C 12 12 15 15 20 20', ((12, 12), (15, 15), (20, 20))),
                ('S 50 90 30 10', ((0, 0), (50, 90), (30, 10),)),
                ('Q 40 20 12 99', ((40, 20), (12, 99),)),
                ('A 1,2,3,0,0,10,20', ((10, 20),)),
                ('Z', ((0, 0),)),
        ):
            points = list(Path(path).control_points)
            self.assertEqual(len(points), len(ret), msg=path)
            self.assertTrue(all(p.is_close(r) for p, r in zip(points, ret)), msg=path)

    def test_bounding_box_lines(self):
        """
        Test the bounding box calculations

        A diagonal line from 20,20 to 90,90 then to +10,+10  "\"

        """
        self.assertEqual((20, 100), (20, 100), Path('M 20,20 L 90,90 l 10,10 Z').bounding_box())
        self.assertEqual((10, 90), (10, 90), Path('M 20,20 L 90,90 L 10,10 Z').bounding_box())

    def test_bounding_box_curves(self):
        """
        Test the bounding box calculations of a curve
        """

        path = Path('M 85,14 C 104.63953,33.639531 104.71989,65.441157'
                    ' 85,85 65.441157,104.71989 33.558843,104.71989 14,85'
                    ' -5.7198883,65.441157 -5.6395306,33.639531 14,14'
                    ' 33.639531,-5.6395306 65.360469,-5.6395306 85,14 Z')
        bb_tuple = path.bounding_box()
        expected = (-0.760, -0.760 + 100.520), (-0.730, -0.730 + 100.520)
        precision = 3

        self.assertDeepAlmostEqual(tuple(bb_tuple.x), expected[0], places=precision)
        self.assertDeepAlmostEqual(tuple(bb_tuple.y), expected[1], places=precision)

    def test_bounding_box_arcs(self):
        """
        Test the bounding box calculations with arcs (currently is rough only)

        Bounding box around a circle with a radius of 50
        it should be from 0,0 -> 100, 100
        """
        path = Path('M 85.355333,14.644651 '
                    'A 50,50 0 0 1 85.355333,85.355341'
                    ' 50,50 0 0 1 14.644657,85.355341'
                    ' 50,50 0 0 1 14.644676,14.644651'
                    ' 50,50 0 0 1 85.355333,14.644651 Z')

        bb_tuple = path.bounding_box()
        expected = (0, 100), (0, 100)
        precision = 4

        self.assertDeepAlmostEqual(tuple(bb_tuple.x), expected[0], places=precision)
        self.assertDeepAlmostEqual(tuple(bb_tuple.y), expected[1], places=precision)

        # self.assertEqual(('ERROR'), Path('M 10 10 S 100 100 300 0').bounding_box())
        # self.assertEqual(('ERRPR'), Path('M 10 10 Q 100 100 300 0').bounding_box())

    def test_adding_to_path(self):
        """Paths can be translated using addition"""
        ret = Path('M 20,20 L 90,90 l 10,10 Z').translate(50, 50)
        self._assertPath(ret, 'M 70 70 L 140 140 l 10 10 Z')

    def test_extending(self):
        """Paths can be extended using addition"""
        ret = Path('M 20 20') + Path('L 40 40 9 10')
        self.assertEqual(type(ret), Path)
        self._assertPath(ret, 'M 20 20 L 40 40 L 9 10')

        ret = Path('M 20 20') + 'C 40 40 9 10 10 10'
        self.assertEqual(type(ret), Path)
        self._assertPath(ret, 'M 20 20 C 40 40 9 10 10 10')

    def test_subtracting_from_path(self):
        """Paths can be translated using addition"""
        ret = Path('M 20,20 L 90,90 l 10,10 Z').translate(-10, -10)
        self._assertPath(ret, 'M 10 10 L 80 80 l 10 10 Z')

    def test_scale(self):
        """Paths can be scaled using the times operator"""
        ret = Path('M 10,10 L 30,30 C 20 20 10 10 10 10 l 10 10').scale(2.5, 3)
        self._assertPath(ret, 'M 25 30 L 75 90 C 50 60 25 30 25 30 l 25 30')

        ret = Path("M 29.867708,101.68274 A 14.867708,14.867708 0 0 1 15,116.55045 14.867708,"
                   "14.867708 0 0 1 0.13229179,101.68274 14.867708,14.867708 0 0 1 15,86.815031 "
                   "14.867708,14.867708 0 0 1 29.867708,101.68274 Z")
        ret = ret.scale(1.2, 0.8)
        self._assertPath(ret, 'M 35.8412 81.3462 '
                              'A 17.8412 11.8942 0 0 1 18 93.2404 '
                              'A 17.8412 11.8942 0 0 1 0.15875 81.3462 '
                              'A 17.8412 11.8942 0 0 1 18 69.452 '
                              'A 17.8412 11.8942 0 0 1 35.8412 81.3462 Z')

    def test_absolute(self):
        """Paths can be converted to absolute"""
        ret = Path("M 100 100 l 10 10 10 10 10 10")
        self._assertPath(ret.to_absolute(), "M 100 100 L 110 110 L 120 120 L 130 130")

        ret = Path("M 100 100 h 10 10 10 v 10 10 10")
        self._assertPath(ret.to_absolute(), "M 100 100 H 110 H 120 H 130 V 110 V 120 V 130")

        ret = Path("M 150,150 a 76,55 0 1 1 283,128")
        self._assertPath(ret.to_absolute(), "M 150 150 A 76 55 0 1 1 433 278")

        ret = Path("m 5 5 h 5 v 5 h -5 z M 15 15 l 5 5 z m 10 10 h 5 v 5 h -5 z")
        self._assertPath(ret.to_absolute(),
                   "M 5 5 H 10 V 10 H 5 Z M 15 15 L 20 20 Z M 25 25 H 30 V 30 H 25 Z")

    def test_relative(self):
        """Paths can be converted to relative"""
        ret = Path("M 100 100 L 110 120 140 140 300 300")
        self._assertPath(ret.to_relative(), "m 100 100 l 10 20 l 30 20 l 160 160")

        ret = Path("M 150,150 A 76,55 0 1 1 433,278")
        self._assertPath(ret.to_relative(), "m 150 150 a 76 55 0 1 1 283 128")

    def test_rotate(self):
        """Paths can be rotated"""
        ret = Path("M 0.24999949,0.24999949 H 12.979167 V 12.979167 H 0.24999949 Z")
        ret = ret.rotate(35, (0, 0))
        self._assertPath(ret, "M 0.0613938 0.348181 L 10.4885 7.64933 L 3.18737 18.0765 L -7.23976 10.7753 Z")

        ret = Path("M 0.24999949,0.24999949 H 12.979167 V 12.979167 H 0.24999949 Z")
        ret = ret.rotate(-35, (0, 0))
        self._assertPath(ret, "M 0.348181 0.0613938 L 10.7753 -7.23976 L 18.0765 3.18737 L 7.64933 10.4885 Z")

        ret = Path("M 0.24999949,0.24999949 H 12.979167 V 12.979167 H 0.24999949 Z")
        ret = ret.rotate(90, (10, -10))
        self._assertPath(ret, "M -0.249999 -19.75 L -0.249999 -7.02083 L -12.9792 -7.02083 L -12.9792 -19.75 Z")

        ret = Path("M 0.24999949,0.24999949 H 12.979167 V 12.979167 H 0.24999949 Z")
        ret = ret.rotate(90)
        self._assertPath(ret, "M 12.9792 0.249999 L 12.9792 12.9792 L 0.249999 12.9792 L 0.249999 0.249999 Z")

    def test_to_arrays(self):
        """Return the full path as a bunch of arrays"""
        ret = Path("M 100 100 L 110 120 H 20 C 120 0 6 10 10 2 Z").to_arrays()
        self.assertEqual(len(ret), 5)
        self.assertEqual(ret[0][0], 'M')
        self.assertEqual(ret[1][0], 'L')
        self.assertEqual(ret[2][0], 'H')
        self.assertEqual(ret[3][0], 'C')

    def test_transform(self):
        """Transform by a whole matrix"""
        ret = Path("M 100 100 L 110 120 L 140 140 L 300 300")
        ret = ret.transform(Transform(translate=(10, 10)))
        self.assertEqual(str(ret), 'M 110 110 L 120 130 L 150 150 L 310 310')
        ret = ret.transform(Transform(translate=(-10, -10)))
        self.assertEqual(str(ret), 'M 100 100 L 110 120 L 140 140 L 300 300')
        ret = Path('M 5 5 H 10 V 15')
        ret = ret.transform(Transform(rotate=-10))
        self.assertEqual('M 5.79228 4.0558 '
                         'L 10.7163 3.18756 '
                         'L 12.4528 13.0356',
                         str(ret))
        ret = Path("M 10 10 A 50,50 0 0 1 85.355333,85.355341 L 100 0")
        ret = ret.transform(Transform(scale=10))
        self.assertEqual(str(ret), 'M 100 100 A 500 500 0 0 1 853.553 853.553 L 1000 0')
        self.assertRaises(ValueError, Horz([10]).transform, Transform())

    def test_inline_transformations(self):
        path = Path()
        self.assertTrue(path is not path.translate(10, 20))
        self.assertTrue(path is not path.transform(Transform(scale=10)))
        self.assertTrue(path is not path.rotate(10))
        self.assertTrue(path is not path.scale(10, 20))

        self.assertTrue(path is path.translate(10, 20, inplace=True))
        self.assertTrue(path is path.transform(Transform(scale=10), inplace=True))
        self.assertTrue(path is path.rotate(10, inplace=True))
        self.assertTrue(path is path.scale(10, 20, inplace=True))

    def test_transformation_preserve_type(self):
        import re
        paths = [
            "M 10 10 A 100 100 0 1 0 100 100 C 10 15 20 20 5 5 Z",
            "m 10 10 a 100 100 0 1 0 100 100 c 10 15 20 20 5 5 z",
            "m 10 10 l 100 200 L 20 30 C 10 20 30 40 11 12",
            "M 10 10 Q 12 13 14 15 T 11 32 T 32 11",
            "m 10 10 q 12 13 14 15 t 11 32 t 32 11",
        ]
        t = Transform(matrix=((1, 2, 3), (4, 5, 6)))
        for path_str in paths:
            path = Path(path_str)
            new_path = path.transform(t)
            cmds = "".join([cmd.letter for cmd in new_path])
            expected = re.sub(r"\d|\s|,", "", path_str)

            self.assertEqual(expected, cmds)
            self.assertAlmostTuple(
                [t.apply_to_point(p) for p in path.control_points],
                list(new_path.control_points)
            )

    def test_arc_transformation(self):
        cases = [
            ("M 10 10 A 100 100 0 1 0 100 100 Z", ((1, 0, 1), (0, 1, 0)), "M 11 10 A 100 100 0 1 0 101 100 Z"),
            ("M 10 10 A 100 100 0 1 0 100 100 Z", ((1, 0, 0), (0, 1, 1)), "M 10 11 A 100 100 0 1 0 100 101 Z"),
            ("M 10 10 A 100 100 0 1 0 100 100 Z", ((1, 0, 1), (0, 1, 1)), "M 11 11 A 100 100 0 1 0 101 101 Z"),
            ("M 10 10 A 100 100 0 1 0 100 100 Z", ((2, 0, 0), (0, 1, 0)), "M 20 10 A 200 100 0 1 0 200 100 Z"),
            ("M 10 10 A 100 100 0 1 0 100 100 Z", ((1, 0, 0), (0, 2, 0)), "M 10 20 A 200 100 90 1 0 100 200 Z"),
            ("M 10 10 A 100 100 0 1 0 100 100 Z", ((1, 0, 0), (0, -1, 0)), "M 10 -10 A 100 100 0 1 1 100 -100 Z"),
            ("M 10 10 A 100 100 0 1 0 100 100 Z", ((1, 2, 0), (0, 2, 0)), "M 30 20 "
                                                                          "A 292.081 68.4742 41.4375 1 0 300 200 Z"),
            ("M 10 10 "
             "A 100 100 0 1 0 100 100 "
             "A 300 200 0 1 0 50 20 Z", ((1, 2, 0), (5, 6, 0)), "M 30,110 "
                                                                "A 810.90492,49.327608 74.368134 1 1 "
                                                                "300,1100 1981.2436,121.13604 75.800007 1 1 90,370 Z"),
        ]
        for path, transform, expected in cases:
            expected = Path(expected)
            result = Path(path).transform(Transform(matrix=transform))
            self.assertDeepAlmostEqual(expected.to_arrays(),
                                       result.to_arrays(), places=4)

    def test_single_point_transform(self):
        from math import sqrt, sin, cos
        self.assertAlmostTuple(list(Path("M 10 10 30 20").control_points), ((10, 10), (30, 20)))
        self.assertAlmostTuple(list(Path("M 10 10 30 20").transform(Transform(translate=(10,7)))
                                    .control_points), ((20, 17), (40, 27)))
        self.assertAlmostTuple(list(Path("M 20 20 5 0 0 7 ").transform(Transform(scale=10))
                                    .control_points), ((200, 200), (50, 0), (0, 70)))

        self.assertAlmostTuple(list(Path("M 20 20 1 0").transform(Transform(rotate=90))
                                    .control_points), ((-20, 20), (0, 1)))

        self.assertAlmostTuple(list(Path("M 20 20 1 0").transform(Transform(rotate=45))
                                    .control_points), ((0, sqrt(20 ** 2 + 20 ** 2)), (sqrt(2)/2, sqrt(2)/2)))

        self.assertAlmostTuple(list(Path("M 1 0 0 1").transform(Transform(rotate=30))
                                    .control_points), ((sqrt(3)/2, 0.5), (-0.5, sqrt(3)/2) ))

class SuperPathTest(TestCase):
    """Super path tests for testing the super path class"""
    def test_closing(self):
        """Closing paths create two arrays"""
        path = Path("M 0,0 C 1.505,0 2.727,-0.823 2.727,-1.841 V -4.348 C 2.727,-5.363"\
                    " 1.505,-6.189 0,-6.189 H -8.3 V 0 Z m -10.713,1.991 h -0.211 V -8.178"\
                    " H 0 c 2.954,0 5.345,1.716 5.345,3.83 v 2.507 C 5.345,0.271 2.954,1.991"
                    " 0,1.991 Z")
        csp = path.to_superpath()
        self.assertEqual(len(csp), 2)

    def test_closing_without_z(self):
        """Closing paths without z create two arrays"""
        path = Path("m 51.553104,253.58572 c -11.644086,-0.14509 -4.683516,-19.48876"\
                    " 2.096523,-8.48973 1.722993,2.92995 0.781608,6.73867 -2.096523,8.48973"\
                    " m -3.100522,-13.02176 c -18.971587,17.33811 15.454875,20.05577"\
                    " 6.51412,3.75474 -1.362416,-2.30812 -3.856221,-3.74395 -6.51412,-3.75474")
        csp = path.to_superpath()
        self.assertEqual(len(csp), 2)

    def test_from_arrays(self):
        """SuperPath from arrays"""
        csp = CubicSuperPath([[
            [[14, 173], [14, 173], (14, 173)],
            [(15, 171), (17, 168), (18, 168)],
        ], [
            [(18, 167), (18, 167), [20, 165]],
            ((21, 164), [22, 162], (23, 162)),
        ]])
        self.assertEqual(
            str(csp.to_path()),
            'M 14 173 C 14 173 15 171 17 168 M 18 167 C 20 165 21 164 22 162'
        )

    def test_is_line(self):
        """Test is super path segments can detect lines"""
        path = Path("m 49,88 70,-1 c 18,17 1,59 1.7,59 "\
                    "0,0 -48.7,18 -70.5,-1 18,-15 25,-32.4 -1.5,-57.2 z")
        csp = path.to_superpath()
        self.assertTrue(csp.is_line(csp[0][0], csp[0][1]), "Should be a line")
        self.assertFalse(csp.is_line(csp[0][3], csp[0][4]), "Both controls not detected")
        self.assertFalse(csp.is_line(csp[0][1], csp[0][2]), "Start control not detected")
        self.assertFalse(csp.is_line(csp[0][2], csp[0][3]), "End control not detected")
        # Also tests if zone close is applied correctly.
        self.assertEqual(str(csp.to_path()), "M 49 88 L 119 87 C 137 104 120 146 120.7 146 "\
            "C 120.7 146 72 164 50.2 145 C 68.2 130 75.2 112.6 48.7 87.8 Z")
