def testLength(self):
p = Path()
p.addPoint(self.p0)
p.addPoint(self.p1)
l0 = Line(self.p0, self.p1)
l1 = Line(self.p1, self.p2)
self.assertEquals(p.length(), l0.length())
p.addPoint(self.p2)
self.assertEquals(p.length(), l0.length() + l1.length())
class LineTestCase(unittest.TestCase):
def setUp(self):
p0 = Point(0,0)
p1 = Point(3,0)
p2 = Point(3,4)
self.l1 = Line(p0, p1)
self.l2 = Line(p1, p2)
self.l3 = Line(p2, p0)
def testLengths(self):
self.assertAlmostEqual(self.l1.length(), 3.0)
self.assertAlmostEqual(self.l2.length(), 4.0)
self.assertAlmostEqual(self.l3.length(), 5.0)
def testDot(self):
a0 = self.l2.angle(Point(1,1))
a1 = self.l2.angle(Point(5, 1))
a2 = self.l1.angle(Point(1,2))
a3 = self.l1.angle(Point(1,-2))
self.assertTrue(a0 > 0)
self.assertTrue(a1 < 0)
self.assertTrue(a2 > 0)
self.assertTrue(a3 < 0)
def length(self):
result = 0
for i in range(0, len(self.points) - 1):
line = Line(self.points[i], self.points[i+1])
result = result + line.length()
return result
