test_tempfile.rb: use assert_predicate

* test/test_tempfile.rb: use assert_predicate and
  assert_not_predicate for better failure messages.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50695 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 4 deletions

diff --git a/test/test_tempfile.rb b/test/test_tempfile.rb
index 1b609f4440..bcd953554a 100644
--- a/test/test_tempfile.rb
+++ b/test/test_tempfile.rb
@@ -112,16 +112,16 @@ class TestTempfile < Test::Unit::TestCase
 
   def test_close_and_close_p
     t = tempfile("foo")
-    assert !t.closed?
+    assert_not_predicate(t, :closed?)
     t.close
-    assert t.closed?
+    assert_predicate(t, :closed?)
   end
 
   def test_close_with_unlink_now_true_works
     t = tempfile("foo")
     path = t.path
     t.close(true)
-    assert t.closed?
+    assert_predicate(t, :closed?)
     assert_nil t.path
     assert_file.not_exist?(path)
   end
@@ -143,7 +143,7 @@ class TestTempfile < Test::Unit::TestCase
     t = tempfile("foo")
     path = t.path
     t.close!
-    assert t.closed?
+    assert_predicate(t, :closed?)
     assert_nil t.path
     assert_file.not_exist?(path)
   end