A simple test follows:

Hello, world!

Now perform an iterator test:

Item 1 of 5: one
Item 2 of 5: two
Item 3 of 5: three
Item 4 of 5: four
Item 5 of 5: five

And again for equivalence:

Item 1 of 5: one
Item 2 of 5: two
Item 3 of 5: three
Item 4 of 5: four
Item 5 of 5: five

And finally with the old model:

Item 1 of 5: one
Item 2 of 5: two
Item 3 of 5: three
Item 4 of 5: four
Item 5 of 5: five