Bug: expect comparing RegExp and Set is wrong

[marvinhagemeister]

Describe the bug

The expect function compares class instances incorrectly.

Steps to Reproduce

import { expect } from "jsr:@std/expect";

Deno.test("expect bug", () => {
  // This should throw, but passes
  expect(/foo/).toEqual(new Set());
});

Expected behavior

The expect should throw because a RegExp instance isn't the same as a Set

Environment

• OS: macOS 14.2.1
• deno version: 1.41.3
• std version: 0.220.1

[marvinhagemeister]

Just checked, this works as expected in jest where it throws like you'd expect.