test/ruby/test_hash: minor test cleanup

Prep work for proposed behavior change:
https://bugs.ruby-lang.org/issues/14225

* test/ruby/test_hash.rb (test_tainted_string_key): assert_predicate

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61512 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 4 deletions

diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 4223aa8140..7162f9d01f 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -305,10 +305,10 @@ class TestHash < Test::Unit::TestCase
     h = {}
     h[str] = nil
     key = h.keys.first
-    assert_equal true, str.tainted?
-    assert_equal false, str.frozen?
-    assert_equal true, key.tainted?
-    assert_equal true, key.frozen?
+    assert_predicate str, :tainted?
+    assert_not_predicate str, :frozen?
+    assert_predicate key, :tainted?
+    assert_predicate key, :frozen?
   end
 
   def test_EQUAL # '=='