test(old): add more missing test files and run more tests alone

Copy four files from Vim v8.2.1432.
Try to match Vim's test_alot.vim.
This marks Vim patch 8.2.0164 as ported:

vim-patch:8.2.0164: test_alot takes too long

Problem:    Test_alot takes too long.
Solution:   Run several tests individually.
https://github.com/vim/vim/commit/842931cd7af37ea95e826b7a93a5d5587d18c9bb

1 files changed, 114 insertions, 0 deletions

diff --git a/src/nvim/testdir/test_delete.vim b/src/nvim/testdir/test_delete.vim
new file mode 100644
index 0000000000..b23a3bd025
--- /dev/null
+++ b/src/nvim/testdir/test_delete.vim
@@ -0,0 +1,114 @@
+" Test for delete().
+
+func Test_file_delete()
+  split Xfile
+  call setline(1, ['a', 'b'])
+  wq
+  call assert_equal(['a', 'b'], readfile('Xfile'))
+  call assert_equal(0, delete('Xfile'))
+  call assert_fails('call readfile("Xfile")', 'E484:')
+  call assert_equal(-1, delete('Xfile'))
+  bwipe Xfile
+endfunc
+
+func Test_dir_delete()
+  call mkdir('Xdir1')
+  call assert_true(isdirectory('Xdir1'))
+  call assert_equal(0, delete('Xdir1', 'd'))
+  call assert_false(isdirectory('Xdir1'))
+  call assert_equal(-1, delete('Xdir1', 'd'))
+endfunc
+
+func Test_recursive_delete()
+  call mkdir('Xdir1')
+  call mkdir('Xdir1/subdir')
+  call mkdir('Xdir1/empty')
+  split Xdir1/Xfile
+  call setline(1, ['a', 'b'])
+  w
+  w Xdir1/subdir/Xfile
+  close
+  call assert_true(isdirectory('Xdir1'))
+  call assert_equal(['a', 'b'], readfile('Xdir1/Xfile'))
+  call assert_true(isdirectory('Xdir1/subdir'))
+  call assert_equal(['a', 'b'], readfile('Xdir1/subdir/Xfile'))
+  call assert_true('Xdir1/empty'->isdirectory())
+  call assert_equal(0, delete('Xdir1', 'rf'))
+  call assert_false(isdirectory('Xdir1'))
+  call assert_equal(-1, delete('Xdir1', 'd'))
+  bwipe Xdir1/Xfile
+  bwipe Xdir1/subdir/Xfile
+endfunc
+
+func Test_symlink_delete()
+  if !has('unix')
+    return
+  endif
+  split Xfile
+  call setline(1, ['a', 'b'])
+  wq
+  silent !ln -s Xfile Xlink
+  " Delete the link, not the file
+  call assert_equal(0, delete('Xlink'))
+  call assert_equal(-1, delete('Xlink'))
+  call assert_equal(0, delete('Xfile'))
+  bwipe Xfile
+endfunc
+
+func Test_symlink_dir_delete()
+  if !has('unix')
+    return
+  endif
+  call mkdir('Xdir1')
+  silent !ln -s Xdir1 Xlink
+  call assert_true(isdirectory('Xdir1'))
+  call assert_true(isdirectory('Xlink'))
+  " Delete the link, not the directory
+  call assert_equal(0, delete('Xlink'))
+  call assert_equal(-1, delete('Xlink'))
+  call assert_equal(0, delete('Xdir1', 'd'))
+endfunc
+
+func Test_symlink_recursive_delete()
+  if !has('unix')
+    return
+  endif
+  call mkdir('Xdir3')
+  call mkdir('Xdir3/subdir')
+  call mkdir('Xdir4')
+  split Xdir3/Xfile
+  call setline(1, ['a', 'b'])
+  w
+  w Xdir3/subdir/Xfile
+  w Xdir4/Xfile
+  close
+  silent !ln -s ../Xdir4 Xdir3/Xlink
+
+  call assert_true(isdirectory('Xdir3'))
+  call assert_equal(['a', 'b'], readfile('Xdir3/Xfile'))
+  call assert_true(isdirectory('Xdir3/subdir'))
+  call assert_equal(['a', 'b'], readfile('Xdir3/subdir/Xfile'))
+  call assert_true(isdirectory('Xdir4'))
+  call assert_true(isdirectory('Xdir3/Xlink'))
+  call assert_equal(['a', 'b'], readfile('Xdir4/Xfile'))
+
+  call assert_equal(0, delete('Xdir3', 'rf'))
+  call assert_false(isdirectory('Xdir3'))
+  call assert_equal(-1, delete('Xdir3', 'd'))
+  " symlink is deleted, not the directory it points to
+  call assert_true(isdirectory('Xdir4'))
+  call assert_equal(['a', 'b'], readfile('Xdir4/Xfile'))
+  call assert_equal(0, delete('Xdir4/Xfile'))
+  call assert_equal(0, delete('Xdir4', 'd'))
+
+  bwipe Xdir3/Xfile
+  bwipe Xdir3/subdir/Xfile
+  bwipe Xdir4/Xfile
+endfunc
+
+func Test_delete_errors()
+  call assert_fails('call delete('''')', 'E474:')
+  call assert_fails('call delete(''foo'', 0)', 'E15:')
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab