def tearDown(self):
self.assertTrue(self.vectorQ1 == standardcalc.Vector2D(3, 4))
self.assertTrue(self.vectorQ2 == standardcalc.Vector2D(-3, 4))
self.assertTrue(self.vectorQ3 == standardcalc.Vector2D(-1, -1))
self.assertTrue(self.vectorQ4 == standardcalc.Vector2D(6, -8))
self.assertTrue(self.vectorQ1 == [3, 4])
self.assertTrue(self.vectorQ2 == [-3, 4])
self.assertTrue(self.vectorQ3 == [-1, -1])
self.assertTrue(self.vectorQ4 == [6, -8])
def setUp(self):
# Vectors in each quadrant
# Q1 is top right: x>0, y>0, and goes counter clockwise
self.vectorQ1 = standardcalc.Vector2D(3, 4)
self.vectorQ2 = standardcalc.Vector2D(-3, 4)
self.vectorQ3 = standardcalc.Vector2D(-1, -1)
self.vectorQ4 = standardcalc.Vector2D(6, -8)
self.vectors = [
self.vectorQ1, self.vectorQ2, self.vectorQ3, self.vectorQ4
]
def testScalarMultiplication(self):
actual = self.vectorQ1 * 2
expected = standardcalc.Vector2D(6, 8)
self.assertEqual(actual, expected)
actual = 2 * self.vectorQ1
self.assertEqual(actual, expected)
def testAngles(self):
north = standardcalc.Vector2D(0, 1)
south = standardcalc.Vector2D(0, -1)
west = standardcalc.Vector2D(-1, 0)
east = standardcalc.Vector2D(1, 0)
northeast = standardcalc.Vector2D(1, 1)
northwest = standardcalc.Vector2D(-1, 1)
southeast = standardcalc.Vector2D(1, -1)
southwest = standardcalc.Vector2D(-1, -1)
specialTriangle = standardcalc.Vector2D.create_from_angle(30, 2)
self.assertEqual(north.angle(), 0)
self.assertEqual(south.angle(), 180)
self.assertEqual(west.angle(), -90)
self.assertEqual(east.angle(), 90)
self.assertEqual(northeast.angle(), 45)
self.assertEqual(northwest.angle(), -45)
self.assertEqual(southeast.angle(), 135)
self.assertEqual(southwest.angle(), -135)
self.assertAlmostEqual(specialTriangle.angle(), 30, delta=0.1)
def testAngleBetween(self):
north = standardcalc.Vector2D(0, 1)
south = standardcalc.Vector2D(0, -1)
west = standardcalc.Vector2D(-1, 0)
east = standardcalc.Vector2D(1, 0)
northeast = standardcalc.Vector2D(1, 1)
northwest = standardcalc.Vector2D(-1, 1)
southeast = standardcalc.Vector2D(1, -1)
southwest = standardcalc.Vector2D(-1, -1)
self.assertAlmostEqual(
standardcalc.Vector2D.angle_between(north, south), 180)
self.assertAlmostEqual(standardcalc.Vector2D.angle_between(east, west),
180)
self.assertAlmostEqual(
standardcalc.Vector2D.angle_between(north, east), 90)
self.assertAlmostEqual(
standardcalc.Vector2D.angle_between(north, west), -90)
self.assertAlmostEqual(
standardcalc.Vector2D.angle_between(southeast, south), 45)
self.assertAlmostEqual(
standardcalc.Vector2D.angle_between(southeast, northeast), -90)
self.assertAlmostEqual(standardcalc.Vector2D.angle_between(
southeast, northwest),
180,
places=5)
self.assertAlmostEqual(
standardcalc.Vector2D.angle_between(southeast, west), 135)
self.assertAlmostEqual(
standardcalc.Vector2D.angle_between(southwest, north), 135)
self.assertAlmostEqual(
standardcalc.Vector2D.angle_between(southwest, southeast), -90)
self.assertAlmostEqual(
standardcalc.Vector2D.angle_between(southwest, west), 45)
self.assertAlmostEqual(
standardcalc.Vector2D.angle_between(southwest, southwest), 0, 5)
def testScalarDivision(self):
actual = self.vectorQ1 / 2
expected = standardcalc.Vector2D(1.5, 2)
self.assertEqual(actual, expected)
def testSubtractionToSelf(self):
actual = standardcalc.Vector2D.zero()
actual -= self.vectorQ1
expected = standardcalc.Vector2D(-3, -4)
self.assertEqual(actual, expected)
def testSubtraction(self):
actual = self.vectorQ1 - self.vectorQ2
expected = standardcalc.Vector2D(6, 0)
self.assertEqual(actual, expected)
def testAdditionToSelf(self):
actual = standardcalc.Vector2D.zero()
actual += self.vectorQ1
expected = standardcalc.Vector2D(3, 4)
self.assertEqual(actual, expected)
def testAddition(self):
actual = self.vectorQ1 + self.vectorQ2
expected = standardcalc.Vector2D(0, 8)
self.assertEqual(actual, expected)