patch 9.0.0603: with 'nosplitscroll' folds are not handled correctly

Problem:    With 'nosplitscroll' folds are not handled correctly.
Solution:   Take care of closed folds when moving the cursor. (Luuk van Baal,
            closes #11234)
diff --git a/src/testdir/dumps/Test_nosplitscroll_fold_1.dump b/src/testdir/dumps/Test_nosplitscroll_fold_1.dump
new file mode 100644
index 0000000..748a3c8
--- /dev/null
+++ b/src/testdir/dumps/Test_nosplitscroll_fold_1.dump
@@ -0,0 +1,10 @@
+| +0#0000e05#a8a8a8255@1|1| |+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+| +0#af5f00255#ffffff0@1|8| >a+0#0000000&|f|t|e|r| |f|o|l|d| @60
+| +0#0000e05#a8a8a8255@1|9| |+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+| +0#af5f00255#ffffff0|1|6| |a+0#0000000&|f|t|e|r| |f|o|l|d| @60
+|[+3&&|N|o| |N|a|m|e|]| |[|+|]| @43|8|,|1| @11|T|o|p
+| +0#af5f00255&|2|4| |a+0#0000000&|f|t|e|r| |f|o|l|d| @60
+| +0#0000e05#a8a8a8255|2|5| |+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+| +0#af5f00255#ffffff0|3|2| |a+0#0000000&|f|t|e|r| |f|o|l|d| @60
+|[+1&&|N|o| |N|a|m|e|]| |[|+|]| @43|2|3|,|1| @10|3|2|%
+|:+0&&|w|i|n|c|m|d| |s| @65
diff --git a/src/testdir/dumps/Test_nosplitscroll_fold_2.dump b/src/testdir/dumps/Test_nosplitscroll_fold_2.dump
new file mode 100644
index 0000000..959cb64
--- /dev/null
+++ b/src/testdir/dumps/Test_nosplitscroll_fold_2.dump
@@ -0,0 +1,10 @@
+| +0#0000e05#a8a8a8255@1|1| |+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+| +0#af5f00255#ffffff0@1|8| |a+0#0000000&|f|t|e|r| |f|o|l|d| @60
+| +0#0000e05#a8a8a8255@1|9| |+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+| +0#af5f00255#ffffff0|1|6| |a+0#0000000&|f|t|e|r| |f|o|l|d| @60
+| +0#0000e05#a8a8a8255|1|7| >+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+| +0#af5f00255#ffffff0|2|4| |a+0#0000000&|f|t|e|r| |f|o|l|d| @60
+| +0#0000e05#a8a8a8255|2|5| |+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+| +0#af5f00255#ffffff0|3|2| |a+0#0000000&|f|t|e|r| |f|o|l|d| @60
+| +0#0000e05#a8a8a8255|3@1| |+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+|:+0#0000000#ffffff0|q|u|i|t| @51|1|7|,|1| @9|T|o|p| 
diff --git a/src/testdir/dumps/Test_nosplitscroll_fold_3.dump b/src/testdir/dumps/Test_nosplitscroll_fold_3.dump
new file mode 100644
index 0000000..6880104
--- /dev/null
+++ b/src/testdir/dumps/Test_nosplitscroll_fold_3.dump
@@ -0,0 +1,10 @@
+| +0#0000e05#a8a8a8255@1|1| |+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+| +0#af5f00255#ffffff0@1|8| |a+0#0000000&|f|t|e|r| |f|o|l|d| @60
+| +0#0000e05#a8a8a8255@1|9| |+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+|[+1#0000000#ffffff0|N|o| |N|a|m|e|]| |[|+|]| @43|1|,|1| @11|T|o|p
+| +0#0000e05#a8a8a8255|1|7| |+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+| +0#af5f00255#ffffff0|2|4| >a+0#0000000&|f|t|e|r| |f|o|l|d| @60
+| +0#0000e05#a8a8a8255|2|5| |+|-@1| @1|7| |l|i|n|e|s|:| |i|n|t| |F|u|n|c|N|a|m|e|(|)| |{|-@40
+| +0#af5f00255#ffffff0|3|2| |a+0#0000000&|f|t|e|r| |f|o|l|d| @60
+|[+3&&|N|o| |N|a|m|e|]| |[|+|]| @43|2|4|,|1| @10|2|5|%
+|:+0&&|b|e|l|o|w| |s|p|l|i|t| @62
diff --git a/src/testdir/test_window_cmd.vim b/src/testdir/test_window_cmd.vim
index 2ee4417..aa69522 100644
--- a/src/testdir/test_window_cmd.vim
+++ b/src/testdir/test_window_cmd.vim
@@ -1848,4 +1848,34 @@
   call VerifyScreenDump(buf, 'Test_nosplitscroll_callback_4', {})
 endfunc
 
+function Test_nosplitscroll_fold()
+CheckScreendump
+
+let lines =<< trim END
+  set nosplitscroll
+  set foldmethod=marker
+  set number
+  let line = 1
+  for n in range(1, &lines)
+    call setline(line, ['int FuncName() {/*{{{*/', 1, 2, 3, 4, 5, '}/*}}}*/',
+          \ 'after fold'])
+    let line += 8
+  endfor
+END
+  call writefile(lines, 'XTestNosplitscrollFold', 'D')
+  let buf = RunVimInTerminal('-S XTestNosplitscrollFold', #{rows: 10})
+
+  call term_sendkeys(buf, "L:wincmd s\<CR>")
+  call VerifyScreenDump(buf, 'Test_nosplitscroll_fold_1', {})
+
+  call term_sendkeys(buf, ":quit\<CR>")
+  call VerifyScreenDump(buf, 'Test_nosplitscroll_fold_2', {})
+
+  call term_sendkeys(buf, "H:below split\<CR>")
+  call VerifyScreenDump(buf, 'Test_nosplitscroll_fold_3', {})
+
+  call term_sendkeys(buf, ":wincmd k\<CR>:quit\<CR>")
+  call VerifyScreenDump(buf, 'Test_nosplitscroll_fold_4', {})
+endfunction
+
 " vim: shiftwidth=2 sts=2 expandtab