validators: fix v-default (reported by Niklas Waern)

basis/validators/validators-tests.factor

@@ -2,17 +2,12 @@ IN: validators.tests
 USING: kernel sequences tools.test validators accessors
 namespaces assocs ;
 
-[ "" v-one-line ] must-fail
-[ "hello world" ] [ "hello world" v-one-line ] unit-test
-[ "hello\nworld" v-one-line ] must-fail
-
-[ "" v-one-word ] must-fail
-[ "hello" ] [ "hello" v-one-word ] unit-test
-[ "hello world" v-one-word ] must-fail
-
 [ t ] [ "on" v-checkbox ] unit-test
 [ f ] [ "off" v-checkbox ] unit-test
 
+[ "default test" ] [ "" "default test" v-default ] unit-test
+[ "blah" ] [ "blah" "default test" v-default ] unit-test
+
 [ "foo" v-number ] must-fail
 [ 123 ] [ "123" v-number ] unit-test
 [ 123 ] [ "123" v-integer ] unit-test
@@ -42,6 +37,14 @@ namespaces assocs ;
 [ "http:/www.factorcode.org" v-url ]
 [ "invalid URL" = ] must-fail-with
 
+[ "" v-one-line ] must-fail
+[ "hello world" ] [ "hello world" v-one-line ] unit-test
+[ "hello\nworld" v-one-line ] must-fail
+
+[ "" v-one-word ] must-fail
+[ "hello" ] [ "hello" v-one-word ] unit-test
+[ "hello world" v-one-word ] must-fail
+
 [ 4561261212345467 ] [ "4561261212345467" v-credit-card ] unit-test
 
 [ 4561261212345467 ] [ "4561-2612-1234-5467" v-credit-card ] unit-test

basis/validators/validators.factor

@@ -1,4 +1,4 @@
-! Copyright (C) 2006, 2008 Slava Pestov
+! Copyright (C) 2006, 2010 Slava Pestov
 ! See http://factorcode.org/license.txt for BSD license.
 USING: kernel continuations sequences math namespaces make sets
 math.parser math.ranges assocs regexp unicode.categories arrays
@@ -9,7 +9,7 @@ IN: validators
     >lower "on" = ;
 
 : v-default ( str def -- str/def )
-    [ nip empty? ] 2keep ? ;
+    [ drop empty? not ] 2keep ? ;
 
 : v-required ( str -- str )
     dup empty? [ "required" throw ] when ;