mirror of https://github.com/tc39/test262.git
49 lines
1.4 KiB
JavaScript
49 lines
1.4 KiB
JavaScript
// Copyright (C) 2015 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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es6id: 12.10.3
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description: Invocation of `Symbol.toPrimitive` method during coercion
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info: >
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[...]
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7. Return the result of performing Abstract Equality Comparison rval ==
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lval.
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ES6 Section 7.2.12 Abstract Equality Comparison
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[...]
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10. If Type(x) is either String, Number, or Symbol and Type(y) is Object,
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then return the result of the comparison x == ToPrimitive(y).
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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 y = {};
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var callCount = 0;
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var thisVal, args;
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y[Symbol.toPrimitive] = function() {
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callCount += 1;
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thisVal = this;
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args = arguments;
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};
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0 == y;
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assert.sameValue(callCount, 1, 'method invoked exactly once');
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assert.sameValue(thisVal, y, '`this` value is the object being compared');
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assert.sameValue(args.length, 1, 'method invoked with exactly one argument');
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assert.sameValue(
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args[0],
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'default',
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'method invoked with the string "default" as the first argument'
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);
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