patch 8.0.1652: term_dumpwrite() does not output composing characters
Problem: term_dumpwrite() does not output composing characters.
Solution: Use the cell index.
diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 5e817de..d0ef325 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -978,6 +978,28 @@
call assert_equal(':popup PopUp :', trim(getline(a:off + 20)))
endfunc
+func Test_terminal_dumpwrite_composing()
+ if !CanRunVimInTerminal()
+ return
+ endif
+ let save_enc = &encoding
+ set encoding=utf-8
+ call assert_equal(1, winnr('$'))
+
+ let text = " a\u0300 e\u0302 o\u0308"
+ call writefile([text], 'Xcomposing')
+ let buf = RunVimInTerminal('Xcomposing', {})
+ call WaitFor({-> term_getline(buf, 1) =~ text})
+ call term_dumpwrite(buf, 'Xdump')
+ let dumpline = readfile('Xdump')[0]
+ call assert_match('|à| |ê| |ö', dumpline)
+
+ call StopVimInTerminal(buf)
+ call delete('Xcomposing')
+ call delete('Xdump')
+ let &encoding = save_enc
+endfunc
+
" just testing basic functionality.
func Test_terminal_dumpload()
call assert_equal(1, winnr('$'))