Carp/test/maybe.carp

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(load "Test.carp")
(use-all Maybe Test)
(deftest test
(assert-true test
(nothing? &(the (Maybe Int) (Nothing)))
"nothing? works on Nothing"
)
(assert-false test
(nothing? &(Just 1))
"nothing? works on Just"
)
(assert-true test
(just? &(Just 1))
"just? works on Just"
)
(assert-false test
(just? &(the (Maybe Int) (Nothing)))
"just? works on Nothing"
)
(assert-equal test
1
(from (Just 1) 0)
"from works on Just"
)
(assert-equal test
0
(from (the (Maybe Int) (Nothing)) 0)
"from works on Nothing"
)
(assert-equal test
1
(unsafe-from (Just 1))
"unsafe-from works on Just"
)
(assert-equal test
2
(from (apply (Just 1) Int.inc) 0)
"apply works on Just"
)
(assert-equal test
0
(from (apply (the (Maybe Int) (Nothing)) Int.inc) 0)
"apply works on Nothing"
)
(assert-equal test
&(Result.Success 1)
&(to-result (Just 1) @"error")
"to-result works on Just"
)
(assert-equal test
&(the (Result Int String) (Result.Error @"error"))
&(to-result (Nothing) @"error")
"to-result works on Nothing"
)
(assert-equal test
1
@(Pointer.to-ref (ptr (Just 1)))
"ptr works on Just"
)
(assert-true test
(null? (ptr (the (Maybe Int) (Nothing))))
"ptr works on Nothing"
)
(assert-equal test
&(Just 0)
&(from-ptr (address (zero)))
"from-ptr works on Ptr/Just"
)
(assert-equal test
&(Nothing)
&(the (Maybe Int) (from-ptr NULL))
"from-ptr works on NULL/Nothing"
)
)