Hello Stuart and all!
There is something strange going on with (is (thrown? ...)) form:
user=> (use 'clojure.contrib.test-is)
nil
user=> (is (= 2 2))
true
; this works
user=> (/ 1 0)
java.lang.ArithmeticException: Divide by zero (NO_SOURCE_FILE:0)
user=> (is (thrown? ArithmeticException (/ 1 0)))
#<ArithmeticException java.lang.ArithmeticException: Divide by zero>
; this doesn't work
user=> (if)
java.lang.Exception: Too few arguments to if (NO_SOURCE_FILE:10)
user=> (is (thrown? Exception (if)))
java.lang.Exception: Too few arguments to if (NO_SOURCE_FILE:13)
user=> (if true)
java.lang.Exception: Too few arguments to if (NO_SOURCE_FILE:29)
user=> (is (thrown? Exception (if true)))
java.lang.Exception: Too few arguments to if (NO_SOURCE_FILE:14)
; this works
user=> (- 2)
-2
user=> (-)
java.lang.IllegalArgumentException: Wrong number of args passed to: core$-
(NO_SOURCE_FILE:0)
user=> (is (thrown? IllegalArgumentException (-)))
#<IllegalArgumentException java.lang.IllegalArgumentException: Wrong number
of args passed to: core$->
Even though 'if' is a special form, shouldn't (is (thrown? Exception (if)))
catch the Exception correctly? Also, notice that (if) throws different
exception than (-) - would it make sense to unify these exceptions?
Another example:
user=> (vals {:a 1 :b 2})
(1 2)
user=> (vals [1 2])
java.lang.ClassCastException: java.lang.Integer cannot be cast to
java.util.Map$Entry
(user=> (is (thrown? ClassCastException (vals [1 2])))
FAIL in (:20)
expected: (thrown? ClassCastException (vals [1 2]))
actual: nil
nil
We can see that exception doesn't get processed/caught correctly.
Also see REPL - it prints redundant "(" character after exception was
thrown. Hitting ENTER fixes it:
user=> (vals [1 2])
java.lang.ClassCastException: java.lang.Integer cannot be cast to
java.util.Map$Entry
(user=>
user=>
Thank you for looking at this, Frantisek
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