Azurite doesn't support get page ranges that differ between a specified snapshot and this page blob

[zzhxiaofeng]

Error Description: Azurite doesn't support get page ranges that differ between a specified snapshot and this page blob.

To Reproduce: Please run the demo code as following:

import { BlobServiceClient, StorageSharedKeyCredential } from "@azure/storage-blob";
import { assert } from "chai";

async function main() {
    const blobServiceClient = new BlobServiceClient("<Azurite-https-endpoint>", new StorageSharedKeyCredential("<account-name>", "<account-key>"));
    const containerClient = blobServiceClient.getContainerClient("<container-name>");
    await containerClient.create();
    const pageBlobClient = containerClient.getPageBlobClient("<blob-name>");
    await pageBlobClient.create(1024);
    await pageBlobClient.uploadPages("b".repeat(1024), 0, 1024);
    const snapshotResult = await pageBlobClient.createSnapshot();
    await pageBlobClient.uploadPages("a".repeat(512), 0, 512);
    await pageBlobClient.clearPages(512, 512);
    await pageBlobClient.getPageRangesDiff(0, 1024, snapshotResult.snapshot!);
}

main().catch((err) => {
    assert.ok((err as any).code === "APINotImplemented");
});

Error Track: https://github.com/Azure/Azurite/blob/master/src/blob/handlers/PageBlobHandler.ts#L402 Api getPageRangesDiff is not implemented in Azurite.

Expected Behavior: Azurite supports get page ranges that differ between a specified snapshot and this page blob.

@jongio for notification.

[blueww]

@zzhxiaofeng

Thanks for reporting this issue! Incremental copy is still not supported in Azurite.

Azurite welcome contribution. It would be great if you could raise a PR to fix it!