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52 lines
1.3 KiB
JavaScript
52 lines
1.3 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-addition-operator-plus-runtime-semantics-evaluation
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es6id: 12.7.3.1
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description: >
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Behavior when error is thrown while accessing `Symbol.toPrimitive` property
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info: |
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[...]
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5. Let lprim be ? ToPrimitive(lval).
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6. Let rprim be ? ToPrimitive(rval).
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[...]
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ES6 Section 7.1.1 ToPrimitive ( input [, PreferredType] )
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1. If PreferredType was not passed, let hint be "default".
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[...]
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4. Let exoticToPrim be GetMethod(input, @@toPrimitive).
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5. ReturnIfAbrupt(exoticToPrim).
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6. If exoticToPrim is not undefined, then
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a. Let result be Call(exoticToPrim, input, «hint»).
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[...]
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features: [Symbol.toPrimitive]
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---*/
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var thrower = {};
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var counter = {};
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var callCount = 0;
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Object.defineProperty(thrower, Symbol.toPrimitive, {
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get: function() {
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throw new Test262Error();
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}
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});
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Object.defineProperty(counter, Symbol.toPrimitive, {
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get: function() {
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callCount += 1;
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}
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});
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assert.throws(Test262Error, function() {
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thrower + counter;
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}, 'error from property access of left-hand side');
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assert.sameValue(callCount, 0);
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assert.throws(Test262Error, function() {
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counter + thrower;
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}, 'error from property access of right-hand side');
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assert.sameValue(callCount, 1);
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