[test] redirect function=fail output, to hide it

test/function-fail.rkt

@@ -1,23 +1,27 @@
 #lang racket/base
-(require trivial/private/test-common)
+(require
+  trivial/private/test-common
+  (only-in racket/port open-output-nowhere))
 
-(module+ test (test-compile-error
-  #:require trivial/function trivial/format
-  #:exn #rx"Type Checker|lambda:|λ:" ;; TODO, bummer to include lambda:
-  ((curry: (lambda (x y) x)) 0 1)
-  (((curry: (lambda (x y z) z)) 'x) 'y 'z)
-  (((curry: (lambda ([x : Integer] [y : Integer]) (+ x x y))) 'a) 'b)
-  ((((curry: (λ ([x : Any] [y : Any]) x)) 'a) 'b) 'c)
-  (map: (λ ([x : String] [y : String])
+(module+ test
+ (parameterize ([current-error-port (open-output-nowhere)]) ;; TODO
+   (test-compile-error
+    #:require trivial/function trivial/format
+    #:exn exn? ;#rx"Type Checker"
+    ((curry: (lambda (x y) x)) 0 1)
+    (((curry: (lambda (x y z) z)) 'x) 'y 'z)
+    (((curry: (lambda ([x : Integer] [y : Integer]) (+ x x y))) 'a) 'b)
+    ((((curry: (λ ([x : Any] [y : Any]) x)) 'a) 'b) 'c)
+    (map: (λ ([x : String] [y : String])
+              (string-append x y))
+            '("hello"))
+    (map: (λ ([x : String] [y : String])
             (string-append x y))
-          '("hello"))
-  (map: (λ ([x : String] [y : String])
-          (string-append x y))
-          '("hello")
-          '("world")
-          '("howareya"))
-  (map: (λ ([x : String] [y : String])
-          (format: "~d ~d" x y))
-          '("hello")
-          '("world"))
-))
+            '("hello")
+            '("world")
+            '("howareya"))
+    (map: (λ ([x : String] [y : String])
+            (format: "~d ~d" x y))
+            '("hello")
+            '("world"))
+)))