def test_invert_mapping(self):
mapping = dict(one=1, two=2, three=3, four=4)
expected = {1: 'one', 2: 'two', 3: 'three', 4: 'four'}
actual = Plot2D._invert_mapping(mapping)
self.assertEqual(actual, expected)
def test_invert_mapping(self):
mapping = dict(one=1, two=2, three=3, four=4)
expected = {1: 'one', 2: 'two', 3: 'three', 4: 'four'}
actual = Plot2D._invert_mapping(mapping)
self.assertEqual(actual, expected)
def test_bad_mapping(self):
mapping = dict(one=1, two=2, three=3, four=1)
emsg = 'Cannot invert non 1-to-1 mapping'
with self.assertRaisesRegexp(ValueError, emsg):
Plot2D._invert_mapping(mapping)
def test_bad_mapping(self):
mapping = dict(one=1, two=2, three=3, four=1)
emsg = 'Cannot invert non 1-to-1 mapping'
with self.assertRaisesRegexp(ValueError, emsg):
Plot2D._invert_mapping(mapping)
