patch 8.2.3335: Vim9: not enough tests run with Vim9 Commit: https://github.com/vim/vim/commit/ef98257593a0abf1300d0f70358dc45a70a62580 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Aug 12 19:27:57 2021 +0200 patch 8.2.3335: Vim9: not enough tests run with Vim9 Problem: Vim9: not enough tests run with Vim9. Solution: Run a few more tests in Vim9 script and :def function. Fix that items(), keys() and values9) return zero for a NULL dict. Make join() return an empty string for a NULL list. Make sort() return an empty list for a NULL list.

Tests for complicated + argument to :edit command

STARTTEST
:$-1w! Xfile1
:$w! Xfile2
:edit +1|s/|/PIPE/|w Xfile1| e Xfile2|1 | s/\//SLASH/|w
:w! test.out
:e Xfile1
:w >> test.out
:qa!
ENDTEST

The result should be in Xfile1: "fooPIPEbar", in Xfile2: "fooSLASHbar"
foo|bar
foo/bar