From 69d74c18c2a72b6206ac84142e46d677f6e90232 Mon Sep 17 00:00:00 2001 From: Alexey Shvayka Date: Mon, 10 Aug 2020 12:24:41 +0300 Subject: [PATCH] Add logical NOT operator test --- .../logical-not/emulates-undefined.js | 25 +++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 test/annexB/language/expressions/logical-not/emulates-undefined.js diff --git a/test/annexB/language/expressions/logical-not/emulates-undefined.js b/test/annexB/language/expressions/logical-not/emulates-undefined.js new file mode 100644 index 0000000000..b87e1a65c4 --- /dev/null +++ b/test/annexB/language/expressions/logical-not/emulates-undefined.js @@ -0,0 +1,25 @@ +// Copyright (C) 2020 Alexey Shvayka. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-binary-logical-operators-runtime-semantics-evaluation +description: > + ToBoolean returns `false` for [[IsHTMLDDA]] object. +info: | + UnaryExpression : ! UnaryExpression + + 1. Let expr be the result of evaluating UnaryExpression. + 2. Let oldValue be ! ToBoolean(? GetValue(expr)). + 3. If oldValue is true, return false. + 4. Return true. + + The [[IsHTMLDDA]] Internal Slot / Changes to ToBoolean + + 1. If argument has an [[IsHTMLDDA]] internal slot, return false. + 2. Return true. +features: [IsHTMLDDA] +---*/ + +var IsHTMLDDA = $262.IsHTMLDDA; + +assert(!IsHTMLDDA); +assert.sameValue(!!IsHTMLDDA, false);