def test_invert_1(self):
# maps a number to a number
x = LinearScale().range([1, 2])
self.assertAlmostEqual(x.invert(0.5), -0.5)
self.assertAlmostEqual(x.invert(1), 0)
self.assertAlmostEqual(x.invert(1.5), 0.5)
self.assertAlmostEqual(x.invert(2), 1)
self.assertAlmostEqual(x.invert(2.5), 1.5)
def test_invert_1(self):
# maps a number to a number
x = LinearScale().range([1, 2])
self.assertAlmostEqual(x.invert(0.5), -0.5)
self.assertAlmostEqual(x.invert(1), 0)
self.assertAlmostEqual(x.invert(1.5), 0.5)
self.assertAlmostEqual(x.invert(2), 1)
self.assertAlmostEqual(x.invert(2.5), 1.5)
def test_clamp_3(self):
# can clamp to the range
x = LinearScale().clamp(True)
self.assertAlmostEqual(x.invert(-0.5), 0)
self.assertAlmostEqual(x.invert(0.5), 0.5)
self.assertAlmostEqual(x.invert(1.5), 1)
x = LinearScale().range([1, 0]).clamp(True)
self.assertAlmostEqual(x.invert(-0.5), 1)
self.assertAlmostEqual(x.invert(0.5), 0.5)
self.assertAlmostEqual(x.invert(1.5), 0)
def test_clamp_3(self):
# can clamp to the range
x = LinearScale().clamp(True)
self.assertAlmostEqual(x.invert(-0.5), 0)
self.assertAlmostEqual(x.invert(0.5), 0.5)
self.assertAlmostEqual(x.invert(1.5), 1)
x = LinearScale().range([1, 0]).clamp(True)
self.assertAlmostEqual(x.invert(-0.5), 1)
self.assertAlmostEqual(x.invert(0.5), 0.5)
self.assertAlmostEqual(x.invert(1.5), 0)
def test_copy_2(self):
# change to the range are isolated
x = LinearScale()
y = x.copy()
x.range([1, 2])
self.assertEqual(x.invert(1), 0)
self.assertEqual(y.invert(1), 1)
self.assertEqual(y.range(), [0, 1])
y.range([2, 3])
self.assertEqual(x.invert(2), 1)
self.assertEqual(y.invert(2), 0)
self.assertEqual(x.range(), [1, 2])
self.assertEqual(y.range(), [2, 3])
def test_copy_2(self):
# change to the range are isolated
x = LinearScale()
y = x.copy()
x.range([1, 2])
self.assertEqual(x.invert(1), 0)
self.assertEqual(y.invert(1), 1)
self.assertEqual(y.range(), [0, 1])
y.range([2, 3])
self.assertEqual(x.invert(2), 1)
self.assertEqual(y.invert(2), 0)
self.assertEqual(x.range(), [1, 2])
self.assertEqual(y.range(), [2, 3])
def test_range_1(self):
# defaults to [0, 1]
x = LinearScale()
self.assertEqual(x.range(), [0, 1])
self.assertAlmostEqual(x.invert(0.5), 0.5)
def test_range_1(self):
# defaults to [0, 1]
x = LinearScale()
self.assertEqual(x.range(), [0, 1])
self.assertAlmostEqual(x.invert(0.5), 0.5)