init

mc_test/node_modules/serialize-error/index.js

@@ -0,0 +1,101 @@
+'use strict';
+
+class NonError extends Error {
+	constructor(message) {
+		super(NonError._prepareSuperMessage(message));
+		Object.defineProperty(this, 'name', {
+			value: 'NonError',
+			configurable: true,
+			writable: true
+		});
+
+		if (Error.captureStackTrace) {
+			Error.captureStackTrace(this, NonError);
+		}
+	}
+
+	static _prepareSuperMessage(message) {
+		try {
+			return JSON.stringify(message);
+		} catch (_) {
+			return String(message);
+		}
+	}
+}
+
+const commonProperties = [
+	{property: 'name', enumerable: false},
+	{property: 'message', enumerable: false},
+	{property: 'stack', enumerable: false},
+	{property: 'code', enumerable: true}
+];
+
+const destroyCircular = ({from, seen, to_, forceEnumerable}) => {
+	const to = to_ || (Array.isArray(from) ? [] : {});
+
+	seen.push(from);
+
+	for (const [key, value] of Object.entries(from)) {
+		if (typeof value === 'function') {
+			continue;
+		}
+
+		if (!value || typeof value !== 'object') {
+			to[key] = value;
+			continue;
+		}
+
+		if (!seen.includes(from[key])) {
+			to[key] = destroyCircular({from: from[key], seen: seen.slice(), forceEnumerable});
+			continue;
+		}
+
+		to[key] = '[Circular]';
+	}
+
+	for (const {property, enumerable} of commonProperties) {
+		if (typeof from[property] === 'string') {
+			Object.defineProperty(to, property, {
+				value: from[property],
+				enumerable: forceEnumerable ? true : enumerable,
+				configurable: true,
+				writable: true
+			});
+		}
+	}
+
+	return to;
+};
+
+const serializeError = value => {
+	if (typeof value === 'object' && value !== null) {
+		return destroyCircular({from: value, seen: [], forceEnumerable: true});
+	}
+
+	// People sometimes throw things besides Error objects…
+	if (typeof value === 'function') {
+		// `JSON.stringify()` discards functions. We do too, unless a function is thrown directly.
+		return `[Function: ${(value.name || 'anonymous')}]`;
+	}
+
+	return value;
+};
+
+const deserializeError = value => {
+	if (value instanceof Error) {
+		return value;
+	}
+
+	if (typeof value === 'object' && value !== null && !Array.isArray(value)) {
+		const newError = new Error();
+		destroyCircular({from: value, seen: [], to_: newError});
+		return newError;
+	}
+
+	return new NonError(value);
+};
+
+module.exports = {
+	serializeError,
+	deserializeError
+};