Question

Is there a matcher in Hamcrest to compare collections for equality?
There is contains and containsInAnyOrder but I need equals not bound to concrete collection type.
E.g. I cannot compare Arrays.asList and Map.values with Hamcrest equals.

Thanks in advance!

Answer 1

I cannot compare Arrays.asList and
Map.values with Hamcrest equals.

This is because of hamcrest’s over-zealous type signatures. You can do this equality comparison, but you need to cast the List object to Collection before it’ll compile.

I often have to do casting with Hamcrest, which feels wrong, but it’s the only way to get it to compile sometimes.