public void ToStringValue_ShouldConvertIntEnumerableToStringValueEnumerable() { var ints = new[] {1, 2, 3, 4}; var enumerator = ints.ToStringValues().GetEnumerator(); enumerator.MoveNext(); Assert.That(enumerator.Current.Value, Is.EqualTo("01")); enumerator.MoveNext(); Assert.That(enumerator.Current.Value, Is.EqualTo("02")); enumerator.MoveNext(); Assert.That(enumerator.Current.Value, Is.EqualTo("03")); enumerator.MoveNext(); Assert.That(enumerator.Current.Value, Is.EqualTo("04")); }