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Diffstat (limited to 'js/src/tests/test262/annexB/language/expressions/logical-assignment/emulates-undefined-coalesce.js')
| -rw-r--r-- | js/src/tests/test262/annexB/language/expressions/logical-assignment/emulates-undefined-coalesce.js | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/tests/test262/annexB/language/expressions/logical-assignment/emulates-undefined-coalesce.js b/js/src/tests/test262/annexB/language/expressions/logical-assignment/emulates-undefined-coalesce.js new file mode 100644 index 0000000000..621b6ee8da --- /dev/null +++ b/js/src/tests/test262/annexB/language/expressions/logical-assignment/emulates-undefined-coalesce.js @@ -0,0 +1,21 @@ +// Copyright (C) 2020 Alexey Shvayka. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-assignment-operators-runtime-semantics-evaluation +description: > + ??= doesn't special-case [[IsHTMLDDA]] object; rval is not evaluated. +info: | + AssignmentExpression : LeftHandSideExpression ??= AssignmentExpression + + 1. Let lref be the result of evaluating LeftHandSideExpression. + 2. Let lval be ? GetValue(lref). + 3. If lval is neither undefined nor null, return lval. +features: [IsHTMLDDA, logical-assignment-operators] +---*/ + +var IsHTMLDDA = $262.IsHTMLDDA; +var value = IsHTMLDDA; +assert.sameValue(value ??= unresolved, IsHTMLDDA); +assert.sameValue(value, IsHTMLDDA); + +reportCompare(0, 0); |