test/unit/test_path.py

   1 import unittest
   2
   3 from pyx import *
   4 from pyx.path import *
   5
   6 epsilon = 1e-5
   7 def isEqual(l1, l2):
   8     return abs(unit.topt(l1-l2))<epsilon
   9
  10
  11
  12 class NormpathTestCase(unittest.TestCase):
  13     def testsplit(self):
  14         p = path(moveto(0,0), lineto(1,0), moveto(2,0), lineto(3,0))
  15         np = normpath(p)
  16
  17         # one split parameter
  18         sp = np.split([0])
  19         assert len(sp)==2 and sp[0] is None and isEqual(sp[1].arclength(), 2)
  20
  21         sp = np.split([0.5])
  22         assert len(sp)==2 and isEqual(sp[0].arclength(), 0.5) and isEqual(sp[1].arclength(), 1.5)
  23
  24         sp = np.split([1])
  25         assert len(sp)==2 and isEqual(sp[0].arclength(), 1) and isEqual(sp[1].arclength(), 1)
  26
  27         sp = np.split([1.5])
  28         assert len(sp)==2 and isEqual(sp[0].arclength(), 1.5) and isEqual(sp[1].arclength(), 0.5)
  29
  30         sp = np.split([2])
  31         assert len(sp)==2 and isEqual(sp[0].arclength(), 2) and sp[1] is None
  32
  33         # two split parameters
  34         sp = np.split([0, 0.5])
  35         assert len(sp)==3 and sp[0] is None and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 1.5)
  36
  37         sp = np.split([0, 1])
  38         assert len(sp)==3 and sp[0] is None and isEqual(sp[1].arclength(), 1) and isEqual(sp[2].arclength(), 1)
  39
  40         sp = np.split([0, 1.5])
  41         assert len(sp)==3 and sp[0] is None and isEqual(sp[1].arclength(), 1.5) and isEqual(sp[2].arclength(), 0.5)
  42
  43         sp = np.split([0, 2])
  44         assert len(sp)==3 and sp[0] is None and isEqual(sp[1].arclength(), 2) and sp[2] is None
  45
  46         sp = np.split([0.5, 1])
  47         assert len(sp)==3 and isEqual(sp[0].arclength(), 0.5) and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 1)
  48
  49         sp = np.split([0.5, 1.5])
  50         assert len(sp)==3 and isEqual(sp[0].arclength(), 0.5) and isEqual(sp[1].arclength(), 1) and isEqual(sp[2].arclength(), 0.5)
  51
  52         sp = np.split([0.5, 2])
  53         assert len(sp)==3 and isEqual(sp[0].arclength(), 0.5) and isEqual(sp[1].arclength(), 1.5) and sp[2] is None
  54
  55         sp = np.split([1, 1.5])
  56         assert len(sp)==3 and isEqual(sp[0].arclength(), 1) and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 0.5)
  57
  58         sp = np.split([1, 2])
  59         assert len(sp)==3 and isEqual(sp[0].arclength(), 1) and isEqual(sp[1].arclength(), 1) and sp[2] is None
  60
  61         sp = np.split([1.5, 2])
  62         assert len(sp)==3 and isEqual(sp[0].arclength(), 1.5) and isEqual(sp[1].arclength(), 0.5) and sp[2] is None
  63
  64         # three split parameters
  65         sp = np.split([0, 0.5, 1])
  66         assert len(sp)==4 and sp[0] is None and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 0.5) and isEqual(sp[3].arclength(), 1)
  67
  68         sp = np.split([0, 0.5, 1.5])
  69         assert len(sp)==4 and sp[0] is None and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 1) and isEqual(sp[3].arclength(), 0.5)
  70
  71         sp = np.split([0, 0.5, 2])
  72         assert len(sp)==4 and sp[0] is None and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 1.5) and sp[3] is None
  73
  74         sp = np.split([0, 1, 1.5])
  75         assert len(sp)==4 and sp[0] is None and isEqual(sp[1].arclength(), 1) and isEqual(sp[2].arclength(), 0.5) and isEqual(sp[3].arclength(), 0.5)
  76
  77         sp = np.split([0, 1, 2])
  78         assert len(sp)==4 and sp[0] is None and isEqual(sp[1].arclength(), 1) and isEqual(sp[2].arclength(), 1) and sp[3] is None
  79
  80
  81         sp = np.split([0, 1.5, 2])
  82         assert len(sp)==4 and sp[0] is None and isEqual(sp[1].arclength(), 1.5) and isEqual(sp[2].arclength(), 0.5) and sp[3] is None
  83
  84         sp = np.split([0.5, 1, 1.5])
  85         assert len(sp)==4 and isEqual(sp[0].arclength(), 0.5) and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 0.5) and isEqual(sp[3].arclength(), 0.5)
  86
  87         sp = np.split([0.5, 1.5, 2])
  88         assert len(sp)==4 and isEqual(sp[0].arclength(), 0.5) and isEqual(sp[1].arclength(), 1) and isEqual(sp[2].arclength(), 0.5) and sp[3] is None
  89
  90         sp = np.split([1, 1.5, 2])
  91         assert len(sp)==4 and isEqual(sp[0].arclength(), 1) and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 0.5) and sp[3] is None
  92
  93
  94         # four split parameters
  95         sp = np.split([0, 0.5, 1, 1.5])
  96         assert len(sp)==5 and sp[0] is None and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 0.5) and isEqual(sp[3].arclength(), 0.5) and isEqual(sp[4].arclength(), 0.5)
  97
  98         sp = np.split([0, 0.5, 1, 2])
  99         assert len(sp)==5 and sp[0] is None and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 0.5) and isEqual(sp[3].arclength(), 1) and sp[4] is None
 100
 101         sp = np.split([0, 0.5, 1.5, 2])
 102         assert len(sp)==5 and sp[0] is None and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 1) and isEqual(sp[3].arclength(), 0.5) and sp[4] is None
 103
 104         sp = np.split([0, 1, 1.5, 2])
 105         assert len(sp)==5 and sp[0] is None and isEqual(sp[1].arclength(), 1) and isEqual(sp[2].arclength(), 0.5) and isEqual(sp[3].arclength(), 0.5) and sp[4] is None
 106
 107         sp = np.split([0.5, 1, 1.5, 2])
 108         assert len(sp)==5 and isEqual(sp[0].arclength(), 0.5) and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 0.5) and isEqual(sp[3].arclength(), 0.5) and sp[4] is None
 109
 110
 111         # five split parameters
 112         sp = np.split([0, 0.5, 1, 1.5, 2])
 113         assert len(sp)==6 and sp[0] is None and isEqual(sp[1].arclength(), 0.5) and isEqual(sp[2].arclength(), 0.5) and isEqual(sp[3].arclength(), 0.5) and isEqual(sp[4].arclength(), 0.5) and sp[5] is None
 114
 115
 116 suite = unittest.TestSuite((unittest.makeSuite(NormpathTestCase, 'test'),))
 117
 118 if __name__ == "__main__":
 119     runner = unittest.TextTestRunner()
 120     runner.run(suite)
 121