I'm not sure, but probably it behaves so because of throwing at macroexpand
stage.
вторник, 18 декабря 2018 г., 11:29:09 UTC+2 пользователь puzzler написал:
>
> Consider the following macro:
>
> (defmacro f [x] {:pre [(number? x)]} `(+ ~x 5))
> => (f 3)
> 8
> => (f true)
> Unexpected error (AssertionError) macroexpanding f at
> (test:localhost:62048(clj)*:265:28).
> Assert failed: (number? x)
>
> So, as expected it throws an AssertionError if passed a non-number.
> However, the following test (using is from clojure.test) used to work
> prior to 1.10, but now fails:
>
> => (is (thrown? AssertionError (f true)))
> Unexpected error (AssertionError) macroexpanding f at
> (test:localhost:62048(clj)*:268:56).
> Assert failed: (number? x)
>
> What's odd is that the macro still throws an AssertionError, but the
> `thrown?` inside the `is` is no longer intercepting the AssertionError, so
> the test doesn't pass -- instead the error causes a failure in the test
> suite.
>
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