def test_add_same_units(self):
"""Add two amounts having the same units.
"""
# Results in pounds
self.failUnlessEqual(add_amount(2.0, "pound", 0.5, "pound"), 2.5)
self.failUnlessEqual(add_amount(0.5, "pound", 2.0, "pound"), 2.5)
# Results in ounces
self.failUnlessEqual(add_amount(12.0, "ounce", 4.0, "ounce"), 16.0)
self.failUnlessEqual(add_amount(4.0, "ounce", 12.0, "ounce"), 16.0)
def test_add_different_units(self):
"""Add two amounts having different units.
"""
# Results in pounds
self.failUnlessEqual(add_amount(2, "pound", 4, "ounce"), 2.25)
self.failUnlessEqual(add_amount(2, "pound", 12, "ounce"), 2.75)
self.failUnlessEqual(add_amount(0.5, "pound", 4, "ounce"), 0.75)
self.failUnlessEqual(add_amount(0.5, "pound", 12, "ounce"), 1.25)
# Results in ounces
self.failUnlessEqual(add_amount(4, "ounce", 2, "pound"), 36.0)
self.failUnlessEqual(add_amount(12, "ounce", 2, "pound"), 44.0)
self.failUnlessEqual(add_amount(4, "ounce", 0.5, "pound"), 12.0)
self.failUnlessEqual(add_amount(12, "ounce", 0.5, "pound"), 20.0)
