Merge pull request #5675 from brcolow/vim-7.4.1738

vim-patch:7.4.17[35,38,39]

src/nvim/testdir/test_alot.vim

@@ -9,6 +9,7 @@ source test_expr.vim
 source test_expr_utf8.vim
 source test_feedkeys.vim
 source test_menu.vim
+source test_messages.vim
 source test_options.vim
 source test_popup.vim
 source test_regexp_utf8.vim

src/nvim/testdir/test_messages.vim

@@ -0,0 +1,40 @@
+" Tests for :messages
+
+function Test_messages()
+  let oldmore = &more
+  try
+    set nomore
+    " Avoid the "message maintainer" line.
+    let $LANG = ''
+
+    let arr = map(range(10), '"hello" . v:val')
+    for s in arr
+      echomsg s | redraw
+    endfor
+    let result = ''
+
+    " get last two messages
+    redir => result
+    2messages | redraw
+    redir END
+    let msg_list = split(result, "\n")
+    call assert_equal(["hello8", "hello9"], msg_list)
+
+    " clear messages without last one
+    1messages clear
+    redir => result
+    redraw | messages
+    redir END
+    let msg_list = split(result, "\n")
+    call assert_equal(['hello9'], msg_list)
+
+    " clear all messages
+    messages clear
+    redir => result
+    redraw | messages
+    redir END
+    call assert_equal('', result)
+  finally
+    let &more = oldmore
+  endtry
+endfunction