public void ShouldCorrectlyIdentifyWhenValueNotChanged([Values(null, "", "F")] string oldValue, [Values(null, "", "F")] string newValue)
        {
            var update = new WorkItemFieldUpdate {
                OldValue = oldValue, NewValue = newValue
            };

            update.IsValueChanged().Should().BeFalse();
        }
        public void ShouldCorrectlyIdentifyChange([Values(null, "", "G", "f")] string oldValue, [Values("F", "F", "F", "F")] string newValue)
        {
            var update = new WorkItemFieldUpdate {
                OldValue = oldValue, NewValue = newValue
            };

            update.IsValueChanged().Should().BeTrue();
        }