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test: add util.isDeepStrictEqual edge case tests

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Test for deep strict equality when prototype and toStringTag
have been modified in surprising ways.

PR-URL: https://github.com/nodejs/node/pull/25932
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
This commit is contained in:
Rich Trott 2019-02-04 16:10:33 -08:00
parent 935b1af990
commit 5d52c8e43c
1 changed files with 25 additions and 0 deletions
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25
test/parallel/test-util-isDeepStrictEqual.js
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@ -449,6 +449,31 @@ assert.strictEqual(
notUtilIsDeepStrict(boxedSymbol, {});
utilIsDeepStrict(Object(BigInt(1)), Object(BigInt(1)));
notUtilIsDeepStrict(Object(BigInt(1)), Object(BigInt(2)));
const booleanish = new Boolean(true);
Object.defineProperty(booleanish, Symbol.toStringTag, { value: 'String' });
Object.setPrototypeOf(booleanish, String.prototype);
notUtilIsDeepStrict(booleanish, new String('true'));
const numberish = new Number(42);
Object.defineProperty(numberish, Symbol.toStringTag, { value: 'String' });
Object.setPrototypeOf(numberish, String.prototype);
notUtilIsDeepStrict(numberish, new String('42'));
const stringish = new String('0');
Object.defineProperty(stringish, Symbol.toStringTag, { value: 'Number' });
Object.setPrototypeOf(stringish, Number.prototype);
notUtilIsDeepStrict(stringish, new Number(0));
const bigintish = new Object(BigInt(42));
Object.defineProperty(bigintish, Symbol.toStringTag, { value: 'String' });
Object.setPrototypeOf(bigintish, String.prototype);
notUtilIsDeepStrict(bigintish, new String('42'));
const symbolish = new Object(Symbol('fhqwhgads'));
Object.defineProperty(symbolish, Symbol.toStringTag, { value: 'String' });
Object.setPrototypeOf(symbolish, String.prototype);
notUtilIsDeepStrict(symbolish, new String('fhqwhgads'));
}
// Minus zero