commit 46af7bc08debbf408d025680eeef136fb3b528ef
author zeertzjq <zeertzjq@outlook.com> Thu Jul 28 12:34:09 2022 +0100
committer Bram Moolenaar <Bram@vim.org> Thu Jul 28 12:34:09 2022 +0100
tree 8770d0e93cb01df8e5d0780279a083b874dc0fc8
parent 5748b7f2c8a8e8e6d12b3e2531df5c0261fd8f3b

patch 9.0.0099: scrollback can be wrong after redrawing the command line

Problem:    Scrollback can be wrong after redrawing the command line.
Solution:   Clear unfinished scrollback when redrawing. (closes #10807)

src/testdir/test_messages.vim

diff --git a/src/testdir/test_messages.vim b/src/testdir/test_messages.vim
index 1967a3e..acdbe18 100644
--- a/src/testdir/test_messages.vim
+++ b/src/testdir/test_messages.vim
@@ -176,7 +176,9 @@
   let buf = RunVimInTerminal('', {'rows': 6})
   call term_sendkeys(buf, ":call setline(1, range(1, 100))\n")
 
-  call term_sendkeys(buf, ":%p#\n")
+  call term_sendkeys(buf, ":%pfoo\<C-H>\<C-H>\<C-H>#")
+  call WaitForAssert({-> assert_equal(':%p#', term_getline(buf, 6))})
+  call term_sendkeys(buf, "\n")
   call WaitForAssert({-> assert_equal('  5 5', term_getline(buf, 5))})
   call WaitForAssert({-> assert_equal('-- More --', term_getline(buf, 6))})
 
@@ -252,6 +254,13 @@
   call WaitForAssert({-> assert_equal('100 100', term_getline(buf, 5))})
   call WaitForAssert({-> assert_equal('Press ENTER or type command to continue', term_getline(buf, 6))})
 
+  " A command line that doesn't print text is appended to scrollback,
+  " even if it invokes a nested command line.
+  call term_sendkeys(buf, ":\<C-R>=':'\<CR>:\<CR>g<")
+  call WaitForAssert({-> assert_equal('100 100', term_getline(buf, 4))})
+  call WaitForAssert({-> assert_equal(':::', term_getline(buf, 5))})
+  call WaitForAssert({-> assert_equal('Press ENTER or type command to continue', term_getline(buf, 6))})
+
   call term_sendkeys(buf, ":%p#\n")
   call WaitForAssert({-> assert_equal('  5 5', term_getline(buf, 5))})
   call WaitForAssert({-> assert_equal('-- More --', term_getline(buf, 6))})