You can get even nicer and more useful (due to generated assertion messages) with Sweet.js macros (https://github.com/andreypopp/sweet-assertions https://github

You can get even nicer and more useful (due to generated assertion messages) with Sweet.js macros (https://github.com/andreypopp/sweet-assertions https://github.com/andreypopp/sweet-assertions) describe 'when the universe exists' { it 'should be active' { universe.active should be true } } The pre-generated assertion messages means you get `universe.active should be true` in case of error which includes actual source of the expression.