* test/etc/test_etc.rb: assert only when any value is given.

[Bug #1575] [ruby-core:23722]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27625 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/etc/test_etc.rb

@@ -24,7 +24,7 @@ class TestEtc < Test::Unit::TestCase
       assert_kind_of(Integer, s.expire) if s.respond_to?(:expire)
     end
 
-    assert_raise(RuntimeError) { Etc.passwd { Etc.passwd { } } }
+    Etc.passwd { assert_raise(RuntimeError) { Etc.passwd { } }; break }
   end
 
   def test_getpwuid
@@ -63,7 +63,7 @@ class TestEtc < Test::Unit::TestCase
       assert_kind_of(Integer, s.gid)
     end
 
-    assert_raise(RuntimeError) { Etc.group { Etc.group { } } }
+    Etc.group { assert_raise(RuntimeError) { Etc.group { } }; break }
   end
 
   def test_getgrgid