From 3d59e35db2fbe9314e61f4a80fa4bcd9e79cee06 Mon Sep 17 00:00:00 2001
From: pfg <pfg@pfg.pw>
Date: Fri, 9 May 2025 17:43:00 -0700
Subject: [PATCH] TODO

---
 test/js/bun/test/expect-boxed.test.js         |  3 +
 .../parallel/test-util-isDeepStrictEqual.js   | 94 +++++++++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 test/js/bun/test/expect-boxed.test.js
 create mode 100644 test/js/node/test/parallel/test-util-isDeepStrictEqual.js

diff --git a/test/js/bun/test/expect-boxed.test.js b/test/js/bun/test/expect-boxed.test.js
new file mode 100644
index 0000000000..9ef09f826a
--- /dev/null
+++ b/test/js/bun/test/expect-boxed.test.js
@@ -0,0 +1,3 @@
+test("abc", () => {
+  expect(new Number(2)).not.toEqual(new Number(1));
+});
diff --git a/test/js/node/test/parallel/test-util-isDeepStrictEqual.js b/test/js/node/test/parallel/test-util-isDeepStrictEqual.js
new file mode 100644
index 0000000000..31c5112b1a
--- /dev/null
+++ b/test/js/node/test/parallel/test-util-isDeepStrictEqual.js
@@ -0,0 +1,94 @@
+'use strict';
+
+// Confirm functionality of `util.isDeepStrictEqual()`.
+
+require('../common');
+
+const assert = require('assert');
+const util = require('util');
+
+function utilIsDeepStrict(a, b) {
+  assert.strictEqual(util.isDeepStrictEqual(a, b), true);
+  assert.strictEqual(util.isDeepStrictEqual(b, a), true);
+}
+
+function notUtilIsDeepStrict(a, b) {
+  assert.strictEqual(util.isDeepStrictEqual(a, b), false);
+  assert.strictEqual(util.isDeepStrictEqual(b, a), false);
+}
+
+// Handle boxed primitives
+{
+  const boxedString = new String('test');
+  const boxedSymbol = Object(Symbol());
+  // notUtilIsDeepStrict(new Boolean(true), Object(false)); // TODO
+  notUtilIsDeepStrict(Object(true), new Number(1));
+  // notUtilIsDeepStrict(new Number(2), new Number(1)); // TODO
+  // notUtilIsDeepStrict(boxedSymbol, Object(Symbol())); // TODO
+  notUtilIsDeepStrict(boxedSymbol, {});
+  utilIsDeepStrict(boxedSymbol, boxedSymbol);
+  utilIsDeepStrict(Object(true), Object(true));
+  utilIsDeepStrict(Object(2), Object(2));
+  utilIsDeepStrict(boxedString, Object('test'));
+  boxedString.slow = true;
+  // notUtilIsDeepStrict(boxedString, Object('test')); // TODO
+  boxedSymbol.slow = true;
+  notUtilIsDeepStrict(boxedSymbol, {});
+  utilIsDeepStrict(Object(BigInt(1)), Object(BigInt(1)));
+  // notUtilIsDeepStrict(Object(BigInt(1)), Object(BigInt(2))); // TODO
+
+  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'));
+}
+
+// Handle symbols (enumerable only)
+{
+  const symbol1 = Symbol();
+  const obj1 = { [symbol1]: 1 };
+  const obj2 = { [symbol1]: 1 };
+  const obj3 = { [Symbol()]: 1 };
+  const obj4 = { };
+  // Add a non enumerable symbol as well. It is going to be ignored!
+  Object.defineProperty(obj2, Symbol(), { value: 1 });
+  Object.defineProperty(obj4, symbol1, { value: 1 });
+  notUtilIsDeepStrict(obj1, obj3);
+  utilIsDeepStrict(obj1, obj2);
+  // notUtilIsDeepStrict(obj1, obj4); // TODO
+  // TypedArrays have a fast path. Test for this as well.
+  const a = new Uint8Array(4);
+  const b = new Uint8Array(4);
+  a[symbol1] = true;
+  b[symbol1] = false;
+  // notUtilIsDeepStrict(a, b); // TODO
+  b[symbol1] = true;
+  utilIsDeepStrict(a, b);
+  // The same as TypedArrays is valid for boxed primitives
+  const boxedStringA = new String('test');
+  const boxedStringB = new String('test');
+  boxedStringA[symbol1] = true;
+  // notUtilIsDeepStrict(boxedStringA, boxedStringB); // TODO
+  boxedStringA[symbol1] = true;
+  utilIsDeepStrict(a, b);
+}