akr	2012-06-25 19:21:37 +0900 (Mon, 25 Jun 2012)

  New Revision: 36217

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=36217

  Log:
    add tests for IO#seek.

  Modified files:
    trunk/test/ruby/test_io.rb

Index: test/ruby/test_io.rb
===================================================================
--- test/ruby/test_io.rb	(revision 36216)
+++ test/ruby/test_io.rb	(revision 36217)
@@ -1224,7 +1224,15 @@
     t.puts "bar"
     t.puts "baz"
     t.close
-    t
+    if block_given?
+      begin
+        yield t
+      ensure
+        t.close(true)
+      end
+    else
+      t
+    end
   end
 
   def test_set_lineno
@@ -1444,6 +1452,31 @@
   end
 
 
+  def test_seek
+    make_tempfile {|t|
+      open(t.path) { |f|
+        f.seek(9)
+        assert_equal("az\n", f.read)
+      }
+
+      open(t.path) { |f|
+        f.seek(9, IO::SEEK_SET)
+        assert_equal("az\n", f.read)
+      }
+
+      open(t.path) { |f|
+        f.seek(-4, IO::SEEK_END)
+        assert_equal("baz\n", f.read)
+      }
+
+      open(t.path) { |f|
+        assert_equal("foo\n", f.gets)
+        f.seek(2, IO::SEEK_CUR)
+        assert_equal("r\nbaz\n", f.read)
+      }
+    }
+  end
+
   def test_sysseek
     t = make_tempfile
 

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