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assert: make partialDeepStrictEqual throw when comparing [0] with [-0]
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puskin94 committed Dec 12, 2024
1 parent a1d980c commit d1072de
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Showing 2 changed files with 55 additions and 14 deletions.
49 changes: 35 additions & 14 deletions lib/assert.js
Original file line number Diff line number Diff line change
Expand Up @@ -507,31 +507,52 @@ function partiallyCompareArrays(actual, expected, comparedObjects) {
// Create a map to count occurrences of each element in the expected array
const expectedCounts = new SafeMap();
for (const expectedItem of expected) {
let found = false;
for (const { 0: key, 1: count } of expectedCounts) {
if (isDeepStrictEqual(key, expectedItem)) {
expectedCounts.set(key, count + 1);
found = true;
break;
const expectedIsMinusZero = ObjectIs(expectedItem, -0);
if (ObjectIs(expectedItem, 0) || expectedIsMinusZero) {
// Handle 0 and -0 separately to avoid map key collisions
const zeroKey = expectedIsMinusZero ? '-0' : '0';
expectedCounts.set(zeroKey, (expectedCounts.get(zeroKey) || 0) + 1);
} else {
let found = false;
for (const { 0: key, 1: count } of expectedCounts) {
if (isDeepStrictEqual(key, expectedItem)) {
expectedCounts.set(key, count + 1);
found = true;
break;
}
}
if (!found) {
expectedCounts.set(expectedItem, 1);
}
}
if (!found) {
expectedCounts.set(expectedItem, 1);
}
}

const safeActual = new SafeArrayIterator(actual);

// Create a map to count occurrences of relevant elements in the actual array
for (const actualItem of safeActual) {
for (const { 0: key, 1: count } of expectedCounts) {
if (isDeepStrictEqual(key, actualItem)) {
const actualIsMinusZero = ObjectIs(actualItem, -0);
const zeroKey = actualIsMinusZero ? '-0' : '0';

if (ObjectIs(actualItem, 0) || actualIsMinusZero) {
if (expectedCounts.has(zeroKey)) {
const count = expectedCounts.get(zeroKey);
if (count === 1) {
expectedCounts.delete(key);
expectedCounts.delete(zeroKey);
} else {
expectedCounts.set(key, count - 1);
expectedCounts.set(zeroKey, count - 1);
}
}
} else {
for (const { 0: expectedItem, 1: count } of expectedCounts) {
if (isDeepStrictEqual(expectedItem, actualItem)) {
if (count === 1) {
expectedCounts.delete(expectedItem);
} else {
expectedCounts.set(expectedItem, count - 1);
}
break;
}
break;
}
}
}
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20 changes: 20 additions & 0 deletions test/parallel/test-assert-objects.js
Original file line number Diff line number Diff line change
Expand Up @@ -97,6 +97,16 @@ describe('Object Comparison Tests', () => {
actual: [1, 'two', true],
expected: [1, 'two', false],
},
{
description: 'throws when comparing [0] with [-0]',
actual: [0],
expected: [-0],
},
{
description: 'throws when comparing [-0] with [0]',
actual: [0],
expected: [-0],
},
{
description:
'throws when comparing two Date objects with different times',
Expand Down Expand Up @@ -385,6 +395,16 @@ describe('Object Comparison Tests', () => {
actual: [1, 'two', true],
expected: [1, 'two', true],
},
{
description: 'compares [0] with [0]',
actual: [0],
expected: [0],
},
{
description: 'compares [-0] with [-0]',
actual: [-0],
expected: [-0],
},
{
description: 'compares two Date objects with the same time',
actual: new Date(0),
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