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util: fix formatting of objects with built-in Symbol.toPrimitive #57832

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Merged
nodejs-github-bot merged 6 commits into from
Apr 17, 2025
Merged

util: fix formatting of objects with built-in Symbol.toPrimitive #57832

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74e49ba
util: fix formatting of objects with built-in Symbol.toPrimitive
islandryu Apr 11, 2025
9941038
add symbol test
islandryu Apr 11, 2025
140a6f2
handle the case toPrimitive is defined in prototype
islandryu Apr 12, 2025
476a700
add test
islandryu Apr 12, 2025
5b0ac9b
add comment
islandryu Apr 12, 2025
412347c
fix to not call unnecessary hasOwnProperty
islandryu Apr 14, 2025
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@islandryu
islandryu committed Apr 12, 2025
commit 5b0ac9b2d7a2708556814206d46ab26f52d16333
3 changes: 3 additions & 0 deletions test/parallel/test-util-format.js
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Original file line number Diff line number Diff line change
Expand Up @@ -299,6 +299,7 @@ assert.strictEqual(util.format('%s', -Infinity), '-Infinity');
assert.strictEqual(util.format('%s', symbol), util.inspect(symbol));
}

// Prototype chain handling for toString
{
function hasToStringButNoToPrimitive() {}

Expand All @@ -316,6 +317,7 @@ assert.strictEqual(util.format('%s', -Infinity), '-Infinity');
assert.strictEqual(util.format('%s', obj.toString()), 'hasToStringButNoToPrimitive');
}

// Prototype chain handling for Symbol.toPrimitive
{
function hasToPrimitiveButNoToString() {}

Expand All @@ -332,6 +334,7 @@ assert.strictEqual(util.format('%s', -Infinity), '-Infinity');
assert.strictEqual(util.format('%s', obj[Symbol.toPrimitive]()), 'hasToPrimitiveButNoToString');
}

// Prototype chain handling for both toString and Symbol.toPrimitive
{
function hasBothToStringAndToPrimitive() {}
hasBothToStringAndToPrimitive.prototype.toString = function() {
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