add tests for IO#seek.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36217 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 34 insertions, 1 deletions

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 8dd1f10480..05cfacf225 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -1224,7 +1224,15 @@ class TestIO < Test::Unit::TestCase
     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 @@ class TestIO < Test::Unit::TestCase
   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