test: use assert_not_*

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53871 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 3 deletions

diff --git a/test/io/wait/test_io_wait.rb b/test/io/wait/test_io_wait.rb
index 7b9edea587..6c6fd83116 100644
--- a/test/io/wait/test_io_wait.rb
+++ b/test/io/wait/test_io_wait.rb
@@ -37,16 +37,16 @@ class TestIOWait < Test::Unit::TestCase
   end
 
   def test_ready?
-    refute @r.ready?, "shouldn't ready, but ready"
+    assert_not_predicate @r, :ready?, "shouldn't ready, but ready"
     @w.syswrite "."
     sleep 0.1
-    assert @r.ready?, "should ready, but not"
+    assert_predicate @r, :ready?, "should ready, but not"
   end
 
   def test_buffered_ready?
     @w.syswrite ".\n!"
     assert_equal ".\n", @r.gets
-    assert @r.ready?
+    assert_predicate @r, :ready?
   end
 
   def test_wait