This will make every TDD/Groovy enthusiast happy: Groovy 1.7 will contain powerful assertions. This assertion here
assert new File('foo.bar') == new File('example.txt')
will yield this output:
Caught: Assertion failed: assert new File('foo.bar') == new File('example.txt') | | | foo.bar | example.txt false
Isn’t that cool?
Read more about the new Features in Groovy 1.7.