From 76cb9c2a39d477a64824a985ade40507e3bbade1 Mon Sep 17 00:00:00 2001
From: Adam Mathes <adam@adammathes.com>
Date: Fri, 13 Feb 2026 21:34:48 -0800
Subject: feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

---
 .../node_modules/@vitest/utils/dist/serialize.js   | 118 +++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 vanilla/node_modules/@vitest/utils/dist/serialize.js

(limited to 'vanilla/node_modules/@vitest/utils/dist/serialize.js')

diff --git a/vanilla/node_modules/@vitest/utils/dist/serialize.js b/vanilla/node_modules/@vitest/utils/dist/serialize.js
new file mode 100644
index 0000000..f3ad0ad
--- /dev/null
+++ b/vanilla/node_modules/@vitest/utils/dist/serialize.js
@@ -0,0 +1,118 @@
+const IS_RECORD_SYMBOL = "@@__IMMUTABLE_RECORD__@@";
+const IS_COLLECTION_SYMBOL = "@@__IMMUTABLE_ITERABLE__@@";
+function isImmutable(v) {
+	return v && (v[IS_COLLECTION_SYMBOL] || v[IS_RECORD_SYMBOL]);
+}
+const OBJECT_PROTO = Object.getPrototypeOf({});
+function getUnserializableMessage(err) {
+	if (err instanceof Error) {
+		return `<unserializable>: ${err.message}`;
+	}
+	if (typeof err === "string") {
+		return `<unserializable>: ${err}`;
+	}
+	return "<unserializable>";
+}
+// https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm
+function serializeValue(val, seen = new WeakMap()) {
+	if (!val || typeof val === "string") {
+		return val;
+	}
+	if (val instanceof Error && "toJSON" in val && typeof val.toJSON === "function") {
+		const jsonValue = val.toJSON();
+		if (jsonValue && jsonValue !== val && typeof jsonValue === "object") {
+			if (typeof val.message === "string") {
+				safe(() => jsonValue.message ?? (jsonValue.message = normalizeErrorMessage(val.message)));
+			}
+			if (typeof val.stack === "string") {
+				safe(() => jsonValue.stack ?? (jsonValue.stack = val.stack));
+			}
+			if (typeof val.name === "string") {
+				safe(() => jsonValue.name ?? (jsonValue.name = val.name));
+			}
+			if (val.cause != null) {
+				safe(() => jsonValue.cause ?? (jsonValue.cause = serializeValue(val.cause, seen)));
+			}
+		}
+		return serializeValue(jsonValue, seen);
+	}
+	if (typeof val === "function") {
+		return `Function<${val.name || "anonymous"}>`;
+	}
+	if (typeof val === "symbol") {
+		return val.toString();
+	}
+	if (typeof val !== "object") {
+		return val;
+	}
+	if (typeof Buffer !== "undefined" && val instanceof Buffer) {
+		return `<Buffer(${val.length}) ...>`;
+	}
+	if (typeof Uint8Array !== "undefined" && val instanceof Uint8Array) {
+		return `<Uint8Array(${val.length}) ...>`;
+	}
+	// cannot serialize immutables as immutables
+	if (isImmutable(val)) {
+		return serializeValue(val.toJSON(), seen);
+	}
+	if (val instanceof Promise || val.constructor && val.constructor.prototype === "AsyncFunction") {
+		return "Promise";
+	}
+	if (typeof Element !== "undefined" && val instanceof Element) {
+		return val.tagName;
+	}
+	if (typeof val.toJSON === "function") {
+		return serializeValue(val.toJSON(), seen);
+	}
+	if (seen.has(val)) {
+		return seen.get(val);
+	}
+	if (Array.isArray(val)) {
+		// eslint-disable-next-line unicorn/no-new-array -- we need to keep sparse arrays ([1,,3])
+		const clone = new Array(val.length);
+		seen.set(val, clone);
+		val.forEach((e, i) => {
+			try {
+				clone[i] = serializeValue(e, seen);
+			} catch (err) {
+				clone[i] = getUnserializableMessage(err);
+			}
+		});
+		return clone;
+	} else {
+		// Objects with `Error` constructors appear to cause problems during worker communication
+		// using `MessagePort`, so the serialized error object is being recreated as plain object.
+		const clone = Object.create(null);
+		seen.set(val, clone);
+		let obj = val;
+		while (obj && obj !== OBJECT_PROTO) {
+			Object.getOwnPropertyNames(obj).forEach((key) => {
+				if (key in clone) {
+					return;
+				}
+				try {
+					clone[key] = serializeValue(val[key], seen);
+				} catch (err) {
+					// delete in case it has a setter from prototype that might throw
+					delete clone[key];
+					clone[key] = getUnserializableMessage(err);
+				}
+			});
+			obj = Object.getPrototypeOf(obj);
+		}
+		if (val instanceof Error) {
+			safe(() => val.message = normalizeErrorMessage(val.message));
+		}
+		return clone;
+	}
+}
+function safe(fn) {
+	try {
+		return fn();
+	} catch {}
+}
+function normalizeErrorMessage(message) {
+	return message.replace(/__(vite_ssr_import|vi_import)_\d+__\./g, "");
+}
+
+export { serializeValue };
-- 
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