On Dec 15, 2010, at 6:05 PM, Ken Wesson wrote: >> Midje makes it easy to use functions other than equality to check results: >> >> (facts >> (first (primes-greater-than-2)) => odd? >> (some-complicated-function) => (in-any-order [1 2 3])) > > So, a predicate is called on the result instead of tested for equality > with the result?
Yes. The use of #'odd? as a checker is just showing off. I'm not sure I've ever actually used a Clojure function as a checker in real life. I always use one of Midje's predefined checkers: https://github.com/marick/Midje/wiki/Checkers > >> Midje contains other features you might expect from a test framework. For >> example, when you have to use state, it gives you a way to set it up or tear >> it down: >> >> (fact >> (against-background (before :checks (swap! test-atom (constantly 0)))) >> (swap! test-atom inc) => 1 >> (swap! test-atom dec) => -1) > > Why not use (reset! test-atom 0) above? For a very subtle reason: I didn't think of it. > >> (background (around :facts (sql/with-connection db ?form))) > > This doesn't seem to be wrapping anything. What determines its scope? #'background's scope is the entire namespace (or, I should say, from the point it occurs in a file until the end of a file). It's useful for my emacs midje-mode, where a keypress sends an individual fact to the repl for checking. (In this case, before the fact is checked, it'll be wrapped with the connection form.) You can also wrap multiple facts with (against-background...) (Putting against-background inside a fact is another shorthand that makes sending a single fact to the repl work better.) The whole story about "backgrounds" is here: https://github.com/marick/Midje/wiki/Setup%2C-Teardown%2C-and-State https://github.com/marick/Midje/wiki/Background-prerequisites ----- Brian Marick, Artisanal Labrador Contract programming in Ruby and Clojure Author of /Ring/ (forthcoming; sample: http://bit.ly/hfdf9T) www.exampler.com, www.exampler.com/blog, www.twitter.com/marick -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
