fix tests

Author: jonluca

lib/normalize-args.ts

@@ -46,10 +46,10 @@ function normalizeArgs(_args: Partial<IArguments>): NormalizedArguments {
   try {
     options = getNewOptions(options);
   } catch (e) {
-    console.log(e);
+    console.error(`JSON Schema Ref Parser: Error normalizing options: ${e}`);
   }
 
-  if (!options.mutateInputSchema) {
+  if (!options.mutateInputSchema && typeof schema === "object") {
     // Make a deep clone of the schema, so that we don't alter the original object
     schema = JSON.parse(JSON.stringify(schema));
   }

test/specs/exports.spec.ts

@@ -89,6 +89,8 @@ describe("json-schema-ref-parser package exports", () => {
       "ResolverError",
       "ParserError",
       "UnmatchedParserError",
+      "isHandledError",
+      "JSONParserErrorGroup",
       "UnmatchedResolverError",
     );
   });