3 files changed, 31 insertions, 0 deletions
diff --git a/test/ruby/test_file.rb b/test/ruby/test_file.rb
index 3cf90f7101..b35a2661c9 100644
--- a/test/ruby/test_file.rb
+++ b/test/ruby/test_file.rb
@@ -41,4 +41,6 @@ class TestFile < Test::Unit::TestCase
     yield f
   end
   alias open_file_rw open_file
+
+  include TestEOF::Seek
 end
diff --git a/test/ruby/ut_eof.rb b/test/ruby/ut_eof.rb
index f1ce4f7198..ffd9ba65ab 100644
--- a/test/ruby/ut_eof.rb
+++ b/test/ruby/ut_eof.rb
@@ -53,4 +53,31 @@ module TestEOF
       assert_equal(nil, f.read(1))
     }
   end
+
+  module Seek
+    def open_file_seek(content, pos)
+      open_file(content) do |f|
+        f.seek(pos)
+        yield f
+      end
+    end
+
+    def test_eof_0_seek
+      open_file_seek("", 10) {|f|
+        assert_equal("", f.read)
+        assert_equal(nil, f.read)
+      }
+    end
+
+    def test_eof_1_seek
+      open_file_seek("a", 10) {|f|
+        assert_equal("", f.read)
+        assert_equal(nil, f.read)
+      }
+      open_file_seek("a", 1) {|f|
+        assert_equal("", f.read)
+        assert_equal(nil, f.read)
+      }
+    end
+  end
 end
diff --git a/test/stringio/test_stringio.rb b/test/stringio/test_stringio.rb
index e16bd0e37b..a62fa491b8 100644
--- a/test/stringio/test_stringio.rb
+++ b/test/stringio/test_stringio.rb
@@ -12,4 +12,6 @@ class TestStringIO < Test::Unit::TestCase
     yield f
   end
   alias open_file_rw open_file
+
+  include TestEOF::Seek
 end