Handle negative zero as a distinct value (because it is)

seanmorris · Sep 18, 2024 · ecf98b3 · ecf98b3
1 parent 518fd0d
commit ecf98b3
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Showing 2 changed files with 10 additions and 1 deletion.
diff --git a/Tuple.mjs b/Tuple.mjs
@@ -112,7 +112,7 @@ export default function Tuple(...args)
 
 	if(!mode)
 	{
-		part = JSON.stringify(part.map(p => `${typeof p}::${p}`));
+		part = JSON.stringify(part.map(p => `${typeof p}::${Object.is(p, -0) ? '-0' : p}`));
 
 		if(!maps)
 		{

diff --git a/test/test.mjs b/test/test.mjs
@@ -736,6 +736,15 @@ tests.push(test('Dict JSON Test', t => {
 	assert.strictEqual(JSON.stringify(d1), '{"id":1,"name":"Test"}');
 }));
 
+tests.push(test('Negative Zero Test', t => {
+	const positive = Tuple(Object, 0);
+	const negative = Tuple(Object, -0);
+	assert.ok(Object.is(positive[1], 0));
+	assert.ok(Object.is(negative[1], -0));
+	assert.ok(!Object.is(positive[1], -0));
+	assert.ok(!Object.is(negative[1], 0));
+}));
+
 test(`Ensure memory isn\'t leaking for scalar keys`, async t => {
 	await Promise.allSettled(tests)