nobu	2017-08-12 10:34:13 +0900 (Sat, 12 Aug 2017)

  New Revision: 59576

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=59576

  Log:
    test_stringio.rb: more assertions
    
    * test/stringio/test_stringio.rb (test_read): add assertions
      of return value of read with a buffer string.

  Modified files:
    trunk/test/stringio/test_stringio.rb
Index: test/stringio/test_stringio.rb
===================================================================
--- test/stringio/test_stringio.rb	(revision 59575)
+++ test/stringio/test_stringio.rb	(revision 59576)
@@ -570,12 +570,12 @@ class TestStringIO < Test::Unit::TestCas https://github.com/ruby/ruby/blob/trunk/test/stringio/test_stringio.rb#L570
     assert_equal("\u3042\u3044", f.read(nil, nil), bug5207)
     f.rewind
     s = ""
-    f.read(nil, s)
+    assert_same(s, f.read(nil, s))
     assert_equal("\u3042\u3044", s, bug5207)
     f.rewind
     # not empty buffer
     s = "0123456789"
-    f.read(nil, s)
+    assert_same(s, f.read(nil, s))
     assert_equal("\u3042\u3044", s)
   end
 

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