class TestTriangle(unittest.TestCase):
def setUp(self):
self.triangle = Triangle(2, 3, 4)
def testInvariants(self):
self.assertAlmostEqual(
math.pi,
self.triangle.alfa() + self.triangle.beta() +
self.triangle.gamma())
self.assertAlmostEqual(
self.triangle.a / math.sin(self.triangle.alfa()),
self.triangle.b / math.sin(self.triangle.beta()))
self.assertAlmostEqual(
self.triangle.c / math.sin(self.triangle.gamma()),
self.triangle.b / math.sin(self.triangle.beta()))
def testCircumference(self):
self.assertAlmostEqual(9, self.triangle.circumference())
def testScale(self):
self.triangle.scale(10)
self.assertAlmostEqual(20, self.triangle.a)
self.assertAlmostEqual(30, self.triangle.b)
self.assertAlmostEqual(40, self.triangle.c)
self.testInvariants()
