bun.sh/test/js/node/util/node-inspect-tests/internal-inspect.test.js

import assert from "assert";
import util from "util";

test("no assertion failures", () => {
  // Errors in accessors are not triggered
  const obj = new Proxy(
    { x: 5 },
    {
      get() {
        throw new Error("Error message");
      },
    },
  );
  assert.strictEqual(util.format(obj), "{ x: 5 }");

  assert.strictEqual(util.formatWithOptions({ numericSeparator: true }, "%d", 4000), "4_000");

  const a = {};
  a.b = a;
  assert.strictEqual(util.inspect(a, { compact: false }), "<ref *1> {\n  b: [Circular *1]\n}");
  assert.strictEqual(util.inspect(a, { compact: true }), "<ref *1> { b: [Circular *1] }");

  const cause = new Error("cause");
  const e2 = new Error("wrapper", { cause });
  assert.match(util.inspect(e2), /\[cause\]: Error: cause\n/);
});

//! non-standard property, should this be kept?
test.skip("util.stylizeWithHTML", () => {
  assert.strictEqual(
    util.inspect(
      {
        a: 1,
        b: "<p>\xA0\u{1F4A9}</p>",
        "&lt;": NaN,
        [Symbol("<br>")]: false,
        buf: new Uint8Array([1, 2, 3, 4]),
      },
      {
        compact: false,
        stylize: util.stylizeWithHTML,
      },
    ),
    "{\n" +
      '  a: <span style="color:yellow;">1</span>,\n' +
      '  b: <span style="color:green;">&apos;&lt;p&gt;&nbsp;\u{1F4A9}&lt;&#47;p&gt;&apos;</span>,\n' +
      '  <span style="color:green;">&apos;&amp;lt&#59;&apos;</span>: <span style="color:yellow;">NaN</span>,\n' +
      "  buf: Uint8Array(4) [\n" +
      '    <span style="color:yellow;">1</span>,\n' +
      '    <span style="color:yellow;">2</span>,\n' +
      '    <span style="color:yellow;">3</span>,\n' +
      '    <span style="color:yellow;">4</span>\n' +
      "  ],\n" +
      '  [<span style="color:green;">Symbol&#40;&lt;br&gt;&#41;</span>]: <span style="color:yellow;">false</span>\n' +
      "}",
  );
});