patch 8.2.4987: after deletion a small fold may be closable
Problem: After deletion a small fold may be closable.
Solution: Check for a reverse range. (Brandon Simmons, closes #10457)
diff --git a/src/testdir/test_fold.vim b/src/testdir/test_fold.vim
index 52185dc..b0d07db 100644
--- a/src/testdir/test_fold.vim
+++ b/src/testdir/test_fold.vim
@@ -1479,4 +1479,33 @@
bw!
endfunc
+" Make sure that when you delete 1 line of a fold whose length is 2 lines, the
+" fold can't be closed since its length (1) is now less than foldminlines.
+func Test_indent_one_line_fold_close()
+ let lines =<< trim END
+ line 1
+ line 2
+ line 3
+ END
+
+ new
+ setlocal sw=2 foldmethod=indent
+ call setline(1, lines)
+ " open all folds, delete line, then close all folds
+ normal zR
+ 3delete
+ normal zM
+ call assert_equal(-1, foldclosed(2)) " the fold should not be closed
+
+ " Now do the same, but delete line 2 this time; this covers different code.
+ " (Combining this code with the above code doesn't expose both bugs.)
+ 1,$delete
+ call setline(1, lines)
+ normal zR
+ 2delete
+ normal zM
+ call assert_equal(-1, foldclosed(2))
+ bw!
+endfunc
+
" vim: shiftwidth=2 sts=2 expandtab