From f8691004b069f67becd657a02100d7521d1255a9 Mon Sep 17 00:00:00 2001 From: Bram Moolenaar Date: Thu, 10 Mar 2022 12:20:53 +0000 Subject: patch 8.2.4534: Vim9: "is" operator with empty string and null returns true Problem: Vim9: "is" operator with empty string and null returns true. Solution: Consider empty string and null to be different for "is". --- src/testdir/test_vim9_expr.vim | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'src/testdir/test_vim9_expr.vim') diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim index 4a3803a8f..72e85de3f 100644 --- a/src/testdir/test_vim9_expr.vim +++ b/src/testdir/test_vim9_expr.vim @@ -801,6 +801,13 @@ def Test_expr4_compare_null() assert_false(null_string != null) assert_false(v:null != test_null_string()) assert_false(null != null_string) + + assert_true(null_string is test_null_string()) + assert_false(null_string is '') + assert_false('' is null_string) + assert_false(null_string isnot test_null_string()) + assert_true(null_string isnot '') + assert_true('' isnot null_string) END v9.CheckDefAndScriptSuccess(lines) unlet g:null_dict -- cgit v1.2.1