public async Task ChangeBlobTier_ShouldThrow_WhenBlobUriIsNull()
{
var context = TestHelpers.CreateGUIDContext();
// Act & Assert:
await Assert.ThrowsAsync <ArgumentNullException>(async() =>
await _storageService.ChangeBlobTierAsync(null, BlobAccessTier.Archive,
BlobRehydratePriority.Normal, context).ConfigureAwait(false)).ConfigureAwait(false);
}
