public async Task GivenNoDeletedInstances_WhenCleanupCalled_ThenNotCallStoresAndReturnsCorrectTuple()
{
_indexDataStore
.RetrieveDeletedInstancesAsync(Arg.Any <int>(), Arg.Any <int>(), Arg.Any <CancellationToken>())
.ReturnsForAnyArgs(Enumerable.Empty <VersionedInstanceIdentifier>());
(bool success, int retrievedInstanceCount) = await _deleteService.CleanupDeletedInstancesAsync(CancellationToken.None);
Assert.True(success);
Assert.Equal(0, retrievedInstanceCount);
await _indexDataStore
.ReceivedWithAnyArgs(1)
.RetrieveDeletedInstancesAsync(batchSize: default, maxRetries: default, CancellationToken.None);