From 2aa4a82499d4becd2284cdb482213d541b8804dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 16:29:10 +0200 Subject: Adding upstream version 86.0.1. Signed-off-by: Daniel Baumann --- .../lexical-environment/unscopables-delete.js | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 js/src/tests/non262/lexical-environment/unscopables-delete.js (limited to 'js/src/tests/non262/lexical-environment/unscopables-delete.js') diff --git a/js/src/tests/non262/lexical-environment/unscopables-delete.js b/js/src/tests/non262/lexical-environment/unscopables-delete.js new file mode 100644 index 0000000000..3cd296f4b9 --- /dev/null +++ b/js/src/tests/non262/lexical-environment/unscopables-delete.js @@ -0,0 +1,27 @@ +// If obj[@@unscopables][id], then `delete id` works across `with (obj)` scope. + +this.niche = 7; +let obj = { niche: 8, [Symbol.unscopables]: { niche: true } }; +with (obj) { + delete niche; +} + +assertEq(obj.niche, 8); +assertEq("niche" in this, false); + +// Same thing, but delete a variable introduced by sloppy direct eval. +this.niche = 9; +function f() { + eval("var niche = 10;"); + with (obj) { + assertEq(niche, 10); + delete niche; + } + assertEq(niche, 9); +} + +// Of course none of this affects a qualified delete. +assertEq(delete this.niche, true); +assertEq("niche" in this, false); + +reportCompare(0, 0); -- cgit v1.2.3