From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- .../lexical-environment/unscopables-basics.js | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 js/src/tests/non262/lexical-environment/unscopables-basics.js (limited to 'js/src/tests/non262/lexical-environment/unscopables-basics.js') diff --git a/js/src/tests/non262/lexical-environment/unscopables-basics.js b/js/src/tests/non262/lexical-environment/unscopables-basics.js new file mode 100644 index 0000000000..4032b27746 --- /dev/null +++ b/js/src/tests/non262/lexical-environment/unscopables-basics.js @@ -0,0 +1,22 @@ +// Basics of @@unscopables support. + +// In with(obj), if obj[@@unscopables][id] is truthy, then the identifier id +// is not present as a binding in the with-block's scope. +var x = "global"; +with ({x: "with", [Symbol.unscopables]: {x: true}}) + assertEq(x, "global"); + +// But if obj[@@unscopables][id] is false or not present, there is a binding. +with ({y: "with", z: "with", [Symbol.unscopables]: {y: false}}) { + assertEq(y, "with"); + assertEq(z, "with"); +} + +// ToBoolean(obj[@@unscopables][id]) determines whether there's a binding. +let someValues = [0, -0, NaN, "", undefined, null, "x", {}, []]; +for (let v of someValues) { + with ({x: "with", [Symbol.unscopables]: {x: v}}) + assertEq(x, v ? "global" : "with"); +} + +reportCompare(0, 0); -- cgit v1.2.3