[Azure Storage Files] Bug with getting shared access signature

• Package Name: @azure/storage-file-share
• Package Version: 12.2.0
• Operating system: macOS
• nodejs
  • version: 10.16.3
• browser
  • name/version:
• typescript
  • version:
• Is the bug related to documentation in
  • README.md
  • source code documentation
  • SDK API docs on https://docs.microsoft.com

Describe the bug

2 Issues actually:

1. When fetching access policies for a file share that has null value for either the start date or end date results in invalid date for that null value.

2. Getting a Type Error exception occurs while fetching access policies when an access policy has only defined an identifier and nothing else i.e. null start/end date and no permissions.

TypeError: Cannot read property 'expiresOn' of undefined
    at ShareClient.<anonymous> (ShareClient.ts:993)

The issue is coming from the following lines of code:

      for (const identifier of response) {
        res.signedIdentifiers.push({
          accessPolicy: {
            expiresOn: new Date(identifier.accessPolicy!.expiresOn!),
            permissions: identifier.accessPolicy!.permissions!,
            startsOn: new Date(identifier.accessPolicy!.startsOn!)
          },
          id: identifier.id
        });
      }

Two issues with the code above:

1. It does not check whether expiresOn and startsOn are defined and not null in accessPolicy. This would cause the 1st issue I mentioned above.

2. If I create an access policy with just an identifier, then the result will not even have an accessPolicy element. This is causing the 2nd issue.

I looked up code for getAccessPolicy method on QueueClient here: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/storage/storage-queue/src/QueueClient.ts#L934, and it is implemented correctly.

      for (const identifier of response) {
        let accessPolicy: any = undefined;
        if (identifier.accessPolicy) {
          accessPolicy = {
            permissions: identifier.accessPolicy.permissions
          };

          if (identifier.accessPolicy.expiresOn) {
            accessPolicy.expiresOn = new Date(identifier.accessPolicy.expiresOn);
          }

          if (identifier.accessPolicy.startsOn) {
            accessPolicy.startsOn = new Date(identifier.accessPolicy.startsOn);
          }
        }

        res.signedIdentifiers.push({
          accessPolicy,
          id: identifier.id
        });
      }

[ljian3377]

The next GA release would be in the early November.

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