mirror of https://github.com/tc39/test262.git
73 lines
2.5 KiB
JavaScript
73 lines
2.5 KiB
JavaScript
// Copyright (C) 2021 Alexey Shvayka. 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-toprimitive
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description: >
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BigInt wrapper object is converted to primitive via OrdinaryToPrimitive.
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info: |
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ToPrimitive ( input [ , preferredType ] )
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[...]
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2. If Type(input) is Object, then
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a. Let exoticToPrim be ? GetMethod(input, @@toPrimitive).
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b. If exoticToPrim is not undefined, then
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[...]
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c. If preferredType is not present, let preferredType be number.
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d. Return ? OrdinaryToPrimitive(input, preferredType).
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features: [BigInt]
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---*/
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const BigIntToString = BigInt.prototype.toString;
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let toStringGets = 0;
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let toStringCalls = 0;
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let toStringFunction = function() { ++toStringCalls; return `${BigIntToString.call(this)}foo`; };
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Object.defineProperty(BigInt.prototype, "toString", {
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get: () => { ++toStringGets; return toStringFunction; },
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});
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assert.sameValue("" + Object(1n), "1", "hint: default");
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assert.throws(TypeError, () => { +Object(1n); }, "hint: number");
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assert.sameValue(`${Object(1n)}`, "1foo", "hint: string");
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assert.sameValue(toStringGets, 1);
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assert.sameValue(toStringCalls, 1);
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const BigIntValueOf = BigInt.prototype.valueOf;
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let valueOfGets = 0;
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let valueOfCalls = 0;
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let valueOfFunction = function() { ++valueOfCalls; return BigIntValueOf.call(this) * 2n; };
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Object.defineProperty(BigInt.prototype, "valueOf", {
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get: () => { ++valueOfGets; return valueOfFunction; },
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});
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assert(Object(1n) == 2n, "hint: default");
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assert.sameValue(Object(1n) + 1n, 3n, "hint: number");
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assert.sameValue({ "1foo": 1, "2": 2 }[Object(1n)], 1, "hint: string");
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assert.sameValue(toStringGets, 2);
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assert.sameValue(toStringCalls, 2);
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assert.sameValue(valueOfGets, 2);
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assert.sameValue(valueOfCalls, 2);
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toStringFunction = undefined;
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assert.throws(TypeError, () => { 1 + Object(1n); }, "hint: default");
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assert.sameValue(Object(1n) * 1n, 2n, "hint: number");
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assert.sameValue("".concat(Object(1n)), "2", "hint: string");
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assert.sameValue(toStringGets, 3);
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assert.sameValue(toStringCalls, 2);
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assert.sameValue(valueOfGets, 5);
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assert.sameValue(valueOfCalls, 5);
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valueOfFunction = null;
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assert.throws(TypeError, () => { new Date(Object(1n)); }, "hint: default");
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assert.throws(TypeError, () => { Number(Object(1n)); }, "hint: number");
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assert.throws(TypeError, () => { String(Object(1n)); }, "hint: string");
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assert.sameValue(toStringGets, 6);
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assert.sameValue(toStringCalls, 2);
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assert.sameValue(valueOfGets, 8);
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assert.sameValue(valueOfCalls, 5);
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