static CosmosPagedFlux getMockedPagedFluxForQueryWithNoResults() {
    FeedResponse feedResponse = mock(FeedResponse.class);
    when(feedResponse.getResults()).thenReturn(Collections.EMPTY_LIST);
    CosmosPagedFlux cosmosPagedFlux = mock(CosmosPagedFlux.class);
    when(cosmosPagedFlux.byPage(anyInt())).thenReturn(Flux.just(feedResponse));
    return cosmosPagedFlux;
  }
Utility to mock return value of {@link CosmosAsyncContainer#queryItems(SqlQuerySpec, CosmosQueryRequestOptions, Class)}.
@return {@link CosmosPagedFlux} containing no results.
ambry-cloud/src/test/java/com/github/ambry/cloud/azure/AzureTestUtils.java