def test_project(self):
scale = leather.Months(date(2010, 1, 1), date(2014, 1, 1))
self.assertAlmostEqual(scale.project(date(2011, 1, 1), 0, 48), 12, 0)
self.assertAlmostEqual(scale.project(date(2012, 1, 1), 0, 48), 24, 0)
self.assertAlmostEqual(scale.project(date(2008, 12, 1), 0, 48), -12, 0)
scale = leather.Months(datetime(2010, 1, 1), datetime(2014, 1, 1))
self.assertAlmostEqual(scale.project(datetime(2011, 1, 1), 0, 48), 12,
0)
self.assertAlmostEqual(scale.project(datetime(2012, 1, 1), 0, 48), 24,
0)
self.assertAlmostEqual(scale.project(datetime(2008, 12, 1), 0, 48),
-12, 0)
with self.assertRaises(ValueError):
scale = leather.Months(2010, 2014)
def test_ticks(self):
scale = leather.Months(date(2010, 1, 1), date(2014, 1, 1))
self.assertEqual(scale.ticks(), [
date(2010, 1, 1),
date(2011, 1, 1),
date(2012, 1, 1),
date(2013, 1, 1),
date(2014, 1, 1)
])
scale = leather.Months(date(2010, 1, 1), date(2012, 1, 1))
self.assertEqual(scale.ticks(), [
date(2010, 1, 1),
date(2010, 7, 1),
date(2011, 1, 1),
date(2011, 7, 1),
date(2012, 1, 1)
])
def test_project_interval(self):
scale = leather.Months(date(2010, 1, 1), date(2014, 1, 1))
a, b = scale.project_interval(date(2011, 1, 1), 0, 48)
self.assertAlmostEqual(a, 11.5, 0)
self.assertAlmostEqual(b, 12.5, 0)