def test_get_extra(self):
"""
Getting an enumeration item extra value by enumeration value returns
the extra's value or a default value, defaulting to ``None``.
"""
enum = Enum('doc', enum_values_fixture())
self.assertThat(
enum.extra(u'foo', 'quux'),
Equals(u'hello'))
self.assertThat(
enum.extra(u'foo', 'frob'),
Equals(u'world'))
self.assertThat(
enum.extra(u'bar', 'quux'),
Equals(u'goodbye'))
self.assertThat(
enum.extra(u'bar', 'nope'),
Is(None))
self.assertThat(
enum.extra(u'bar', 'nope', u''),
Equals(u''))
