cloudinary-workbox-plugin/test/Blob.mjs

The official [Cloudinary](http://cloudinary.com) plugin for [Workbox.js](https://developers.google.com/web/tools/workbox/).

/*
 Copyright 2017 Google Inc. All Rights Reserved.
 Licensed 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.
*/

// Blob
// https://w3c.github.io/FileAPI/#dom-blob-blob

class Blob {
  constructor(blobParts, options = {}) {
    if (typeof blobParts === 'undefined') {
      blobParts = [];
    }
    if (!Array.isArray(blobParts)) {
      throw new TypeError(`Failed to construct 'Blob': ` +
          `The provided value cannot be converted to a sequence.`);
    }

    this._parts = blobParts;
    this._type = options.type || '';
  }

  get size() {
    let size = 0;
    for (const part of this._parts) {
      size += part instanceof Blob ? part.size : String(part).length;
    }
    return size;
  }

  get type() {
    return this._type;
  }

  // Warning: non-standard, but used in other mocks for simplicity.
  get _text() {
    let text = '';
    for (const part of this._parts) {
      text += part instanceof Blob ? part._text : String(part);
    }
    return text;
  }

  slice(start, end, type) {
    const bodyString = this._text;
    const slicedBodyString = bodyString.substring(start, end);
    return new Blob([slicedBodyString], {type});
  }
}

export default Blob;