update datafile validation

Author: raju-opti

lib/project_config/project_config.ts

@@ -116,6 +116,8 @@ const RESERVED_ATTRIBUTE_PREFIX = '$opt_';
 function createMutationSafeDatafileCopy(datafile: any): ProjectConfig {
   const datafileCopy = { ...datafile };
 
+  console.log(datafile, datafileCopy);
+
   datafileCopy.audiences = (datafile.audiences || []).map((audience: Audience) => {
     return { ...audience };
   });

lib/utils/config_validator/index.ts

@@ -51,6 +51,8 @@ export const validateDatafile = function(datafile: unknown): any {
     if (SUPPORTED_VERSIONS.indexOf(datafile['version' as keyof unknown]) === -1) {
       throw new OptimizelyError(INVALID_DATAFILE_VERSION, datafile['version' as keyof unknown]);
     }
+  } else {
+    throw new OptimizelyError(INVALID_DATAFILE_MALFORMED);
   }
 
   return datafile;