More error details

Author: AlexHolly

lib/index.js

@@ -60,15 +60,11 @@ SwaggerParser.prototype.parse = async function (path, api, options, callback) {
     let schema = await $RefParser.prototype.parse.call(this, args.path, args.schema, args.options);
 
     if (schema.swagger) {
-      // Verify that the parsed object is a Swagger API
-      if (schema.swagger === undefined || schema.info === undefined || schema.paths === undefined) {
-        throw ono.syntax(`${args.path || args.schema} is not a valid Swagger API definition`);
-      }
-      else if (typeof schema.swagger === "number") {
+      if (typeof schema.swagger === "number") {
         // This is a very common mistake, so give a helpful error message
         throw ono.syntax('Swagger version number must be a string (e.g. "2.0") not a number.');
       }
-      else if (typeof schema.info.version === "number") {
+      else if (schema.info && typeof schema.info.version === "number") {
         // This is a very common mistake, so give a helpful error message
         throw ono.syntax('API version number must be a string (e.g. "1.0.0") not a number.');
       }
@@ -79,15 +75,11 @@ SwaggerParser.prototype.parse = async function (path, api, options, callback) {
     else {
       let supportedVersions = ["3.0.0", "3.0.1", "3.0.2", "3.0.3"];
 
-      // Verify that the parsed object is a Openapi API
-      if (schema.openapi === undefined || schema.info === undefined || schema.paths === undefined) {
-        throw ono.syntax(`${args.path || args.schema} is not a valid Openapi API definition`);
-      }
-      else if (typeof schema.openapi === "number") {
+      if (typeof schema.openapi === "number") {
         // This is a very common mistake, so give a helpful error message
         throw ono.syntax('Openapi version number must be a string (e.g. "3.0.0") not a number.');
       }
-      else if (typeof schema.info.version === "number") {
+      else if (schema.info && typeof schema.info.version === "number") {
         // This is a very common mistake, so give a helpful error message
         throw ono.syntax('API version number must be a string (e.g. "1.0.0") not a number.');
       }