public void Returns_null_if_no_values_stored()
        {
            {
                string expected = null;
                var    actual   = LookupAttribute.GetValueFromAttribute(TestEnum.ItemWithOneValue, "B");
                Assert.Equal(expected, actual);
            }

            {
                string expected = null;
                var    actual   = LookupAttribute.GetValueFromAttribute(TestEnum.ItemWithoutValues, "C");
                Assert.Equal(expected, actual);
            }
        }
        public void Can_get_stored_values()
        {
            {
                var expected = "1";
                var actual   = LookupAttribute.GetValueFromAttribute(TestEnum.ItemWithOneValue, "A");
                Assert.Equal(expected, actual);
            }

            {
                var expected = "1";
                var actual   = LookupAttribute.GetValueFromAttribute(TestEnum.ItemWithTwoValues, "A");
                Assert.Equal(expected, actual);
            }

            {
                var expected = "2";
                var actual   = LookupAttribute.GetValueFromAttribute(TestEnum.ItemWithTwoValues, "B");
                Assert.Equal(expected, actual);
            }
        }