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assert.deepEqual: fix bug with faked boxed primitives #29029

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ljharb wants to merge 3 commits into from
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assert.deepEqual: fix bug with faked boxed primitives #29029

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7759ff9
test: assert: add failing deepEqual test for faked boxed primitives
ljharb Aug 6, 2019
9f53778
util: assert: fix deepEqual comparing fake-boxed to real boxed primitive
ljharb Aug 6, 2019
d90707a
util: isEqualBoxedPrimitive: ensure both values are actual boxed Symbols
ljharb Aug 7, 2019
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11 changes: 8 additions & 3 deletions lib/internal/util/comparisons.js
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Original file line number Diff line number Diff line change
Expand Up @@ -98,8 +98,11 @@ function isEqualBoxedPrimitive(val1, val2) {
return isBigIntObject(val2) &&
BigIntPrototype.valueOf(val1) === BigIntPrototype.valueOf(val2);
}
return isSymbolObject(val2) &&
SymbolPrototype.valueOf(val1) === SymbolPrototype.valueOf(val2);
if (isSymbolObject(val1)) {
return isSymbolObject(val2) &&
SymbolPrototype.valueOf(val1) === SymbolPrototype.valueOf(val2);
}
return false;
}

// Notes: Type tags are historical [[Class]] properties that can be set by
Expand Down Expand Up @@ -221,7 +224,9 @@ function innerDeepEqual(val1, val2, strict, memos) {
if (!areEqualArrayBuffers(val1, val2)) {
return false;
}
} else if (isBoxedPrimitive(val1) && !isEqualBoxedPrimitive(val1, val2)) {
}
if ((isBoxedPrimitive(val1) || isBoxedPrimitive(val2)) &&
!isEqualBoxedPrimitive(val1, val2)) {
return false;
}
return keyCheck(val1, val2, strict, memos, kNoIterator);
Expand Down
14 changes: 12 additions & 2 deletions test/parallel/test-assert-deep.js
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Expand Up @@ -28,8 +28,7 @@ function re(literals, ...values) {
getters: true
});
// Need to escape special characters.
result += str;
result += literals[i + 1];
result += `${str}${literals[i + 1]}`;
}
return {
code: 'ERR_ASSERTION',
Expand Down Expand Up @@ -605,11 +604,21 @@ assert.deepStrictEqual([ 1, 2, NaN, 4 ], [ 1, 2, NaN, 4 ]);
{
const boxedString = new String('test');
const boxedSymbol = Object(Symbol());

const fakeBoxedSymbol = {};
Object.setPrototypeOf(fakeBoxedSymbol, Symbol.prototype);
Object.defineProperty(
fakeBoxedSymbol,
Symbol.toStringTag,
{ enumerable: false, value: 'Symbol' }
);

assertNotDeepOrStrict(new Boolean(true), Object(false));
assertNotDeepOrStrict(Object(true), new Number(1));
assertNotDeepOrStrict(new Number(2), new Number(1));
assertNotDeepOrStrict(boxedSymbol, Object(Symbol()));
assertNotDeepOrStrict(boxedSymbol, {});
assertNotDeepOrStrict(boxedSymbol, fakeBoxedSymbol);
assertDeepAndStrictEqual(boxedSymbol, boxedSymbol);
assertDeepAndStrictEqual(Object(true), Object(true));
assertDeepAndStrictEqual(Object(2), Object(2));
Expand All @@ -618,6 +627,7 @@ assert.deepStrictEqual([ 1, 2, NaN, 4 ], [ 1, 2, NaN, 4 ]);
assertNotDeepOrStrict(boxedString, Object('test'));
boxedSymbol.slow = true;
assertNotDeepOrStrict(boxedSymbol, {});
assertNotDeepOrStrict(boxedSymbol, fakeBoxedSymbol);
}

// Minus zero
Expand Down