Add new test file.
diff --git a/src/testdir/test_visual.vim b/src/testdir/test_visual.vim
new file mode 100644
index 0000000..177f571
--- /dev/null
+++ b/src/testdir/test_visual.vim
@@ -0,0 +1,19 @@
+" Tests for Visual mode
+if !has('multi_byte')
+ finish
+endif
+set encoding=utf-8
+scriptencoding utf-8
+
+if !has('visual')
+ finish
+endif
+
+func Test_block_shift_multibyte()
+ split
+ call setline(1, ['xヹxxx', 'ヹxxx'])
+ exe "normal 1G0l\<C-V>jl>"
+ call assert_equal('x ヹxxx', getline(1))
+ call assert_equal(' ヹxxx', getline(2))
+ q!
+endfunc