blobs.ts

/*
 *  This file is part of CoCalc: Copyright © 2020 Sagemath, Inc.
 *  License: MS-RSL – see LICENSE.md for details
 */

import expect from "expect";

import * as misc_node from "@cocalc/backend/misc_node";

import { blob_store } from "@cocalc/jupyter/blobs";

describe("very basic tests of the blob store -- ", function () {
  const blob_store = get_blob_store();
  if (blob_store == null) {
    throw Error("blob_store is null");
  }

  blob_store.delete_all_blobs();

  it("gets a list of blobs (which should be empty)", () => {
    expect(blob_store.keys()).toEqual([]);
  });

  // got via
  // require('./jupyter').kernel(name:'sage-7.4', verbose:false).execute_code(code:'point((0,0), axes=False, figsize=1)', all:true, cb:(e,m)->console.log(m[2].content.data))
  const blob =
    "iVBORw0KGgoAAAANSUhEUgAAAFkAAAA4CAYAAACWo1RQAAAABHNCSVQICAgIfAhkiAAAAAlwSFlz\nAAAPYQAAD2EBqD+naQAAAQVJREFUeJzt2iEOwjAcRvEPwuSSSY4AbmbciFNxil0DhYNj4CeGmAAc\nCF7T8H7JkrXqn5emqqt5nufop9alB/gHRgYYGWBkgJEBRgYYGWBkgJEBRgYYGWBkgJEBRgYYGWBk\ngJEBRgYYGWBkgJEBRgYYGWBkwKb0AN+435PTafk/HpOuKzvPp1a1vCCapuRwSC6XZd33yfmcNE3Z\nuT5RTeTbLdnv3/eu12S3KzPPN6q5k7fbpG2f67Zd9mpQTeSuS8YxGYblG0fvZL2o5iTXzMgAIwOM\nDDAywMgAIwOMDDAywMgAIwOMDDAywMgAIwOMDDAywMgAIwOMDDAywMgAIwOMDDAy4AEJciLL9Myg\nZwAAAABJRU5ErkJggg==\n";
  const buffer = Buffer.from(blob, "base64");
  const sha1 = misc_node.sha1(buffer);

  it("saves a blob", () => {
    expect(blob_store.save(blob, "image/png")).toBe(sha1);
    expect(blob_store.keys()).toEqual([sha1]);
  });

  it("reads a blob", () => {
    expect(blob_store.get(sha1)).toEqual(buffer);
  });
});