@Test
public void allSuccess() {

    final List<AbstractWriteModel> writeModels = generate5WriteModels();
    final BulkWriteResult result = BulkWriteResult.acknowledged(0, 3, 1, 1,
            List.of(new BulkWriteUpsert(0, new BsonString("upsert 0")),
                    new BulkWriteUpsert(4, new BsonString("upsert 4")))
    );
    // WHEN
    final WriteResultAndErrors resultAndErrors = WriteResultAndErrors.success(writeModels, result);
    final String message = runBulkWriteResultAckFlowAndGetFirstLogEntry(resultAndErrors);
    // THEN
    actorSystem.log().info(message);
    assertThat(message).contains("Acknowledged: Success");
}