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-rw-r--r--tests/monads.scm5
1 files changed, 5 insertions, 0 deletions
diff --git a/tests/monads.scm b/tests/monads.scm
index 9570c208b2..4608deec9e 100644
--- a/tests/monads.scm
+++ b/tests/monads.scm
@@ -48,6 +48,11 @@
(test-begin "monads")
+(test-assert "monad?"
+ (and (every monad? %monads)
+ (every (compose procedure? monad-bind) %monads)
+ (every (compose procedure? monad-return) %monads)))
+
;; The 3 "monad laws": <http://www.haskell.org/haskellwiki/Monad_laws>.
(test-assert "left identity"