Sorted Collections assertion

[sandjelkovic]

It would be great to have an assertion which can check if the Collection is already sorted. The assertion would also accept a Comparator instance to verify with. Similar (or same) as AssertJ

It would be something along these lines:

list shouldBeSortedAccordingTo Comparator.comparingInt { it.position }

or

list shouldBeSortedBy Comparator.comparingInt { it.position }

This could then be chained to a structure like this

list.shouldNotBeEmpty()
.shouldHaveSize(10)
.shouldBeSortedAccordingTo(Comparator.comparing<Slot, Int> { it.position })

[MarkusAmshove]

This is a nice idea, I like it. Would you be willing to open a PR? :-)