superset/superset-frontend/cypress-base/cypress/utils/readResponseBlob.ts

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
/**
 * Read XHR response and parse it as JSON.
 */
export default function readResponseBlob(blob: Blob | JSONValue) {
  return new Promise<ReturnType<JSON['parse']>>(resolve => {
    if (blob instanceof Blob) {
      const reader = new FileReader();
      reader.onload = () => resolve(JSON.parse(String(reader.result || '')));
      reader.readAsText(blob);
    } else {
      resolve(blob);
    }
  });
}