1 files changed, 57 insertions, 0 deletions
diff --git a/test/js/node/util/node-inspect-tests/internal-inspect.test.js b/test/js/node/util/node-inspect-tests/internal-inspect.test.js
new file mode 100644
index 000000000..6e7a76e0d
--- /dev/null
+++ b/test/js/node/util/node-inspect-tests/internal-inspect.test.js
@@ -0,0 +1,57 @@
+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' +
+      "}",
+  );
+});