Mock azure create file - delete file on blob storage using nodejs

Question

I want to mock the creation/deletion of a file on blob storage and I don't know how to do it I did this as:

//create file
  const blobService = azure.createBlobService(storageAccountName, accessKey);
  await workbook.stream.pipe(
      blobService.createWriteStreamToBlockBlob(containerName, blobName)
  );

//Delelete file:

 blobService.deleteBlobIfExists(containerName, fileName, (err: any, result: any) => {
    if (err) { reject(err);
    } else { resolve({statusCode: 200});}
});

I did that to get connection information:

import { BlobServiceClient } from '@azure/storage-blob';
BlobServiceClient.fromConnectionString = jest.fn().mockResolvedValueOnce('fromConnectionString-test');
console.log(BlobServiceClient.prototype.getAccountInfo());

I've some error that logic because i'm not sur the connection is correctly mocked...

 TypeError: Cannot read property 'getAccountInfo' of undefined

Thank you for your help

Answer 1

You are trying to get the account info from the prototype. However, instead of that, you will need to instantiate BlobServiceClient :

const blobServiceClient = BlobServiceClient.fromConnectionString(
  AZURE_STORAGE_CONNECTION_STRING
);
StorageAccountInfo accountInfo = blobServiceClient.getAccountInfo();

See

https://learn.microsoft.com/en-us/azure/storage/blobs/storage-quickstart-blobs-nodejs?tabs=environment-variable-windows https://learn.microsoft.com/en-us/java/api/com.azure.storage.blob.blobserviceclient.getaccountinfo?view=azure-java-stable#com-azure-storage-blob-blobserviceclient-getaccountinfo()