--- /dev/null
+" Tests for using Ctrl-A/Ctrl-X using DBCS.
+if !has('multi_byte')
+ finish
+endif
+set encoding=cp932
+scriptencoding cp932
+
+func SetUp()
+ new
+ set nrformats&
+endfunc
+
+func TearDown()
+ bwipe!
+endfunc
+
+func Test_increment_dbcs_1()
+ set nrformats+=alpha
+ call setline(1, ["\8eR1"])
+ exec "norm! 0\<C-A>"
+ call assert_equal(["\8eR2"], getline(1, '$'))
+ call assert_equal([0, 1, 3, 0], getpos('.'))
+
+ call setline(1, ["\82`\82a\82b0xDE\82e"])
+ exec "norm! 0\<C-X>"
+ call assert_equal(["\82`\82a\82b0xDD\82e"], getline(1, '$'))
+ call assert_equal([0, 1, 10, 0], getpos('.'))
+endfunc
+
+" vim: shiftwidth=2 expandtab