New in 1.4

Facts

• Facts now report their doc strings. Nested facts report nested descriptions.

          (facts "about arithmetic"
            (fact "addition"
              (+ 0 1) => 0))
            ;; FAIL "about arithmetic - addition" at (core.clj:18)

• Tabular facts no longer require variable names to begin with "?".

Checkers

• The throws checker is much more flexible.
• every-checker and some-checker can be used to combine other checkers while still getting helpful failure messages.

      (fact 19 => (every-checker odd?
                                 #(> (count (str %)) 11)))

• Checker synonyms: FALSEY, TRUTHY, and irrelevant (for anything).
• Chatty checkers can destructure their single argument.

Prerequisites

• The =throws=> arrow can be used to throw exceptions.
• You can use vars as well as symbols in prerequisites.

Other

• Better reporting of test failures.
• Better error reporting for many common test-writing mistakes.
• Everything has doc strings.
• expose-testables is another way to test private functions.