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https://issues.apache.org/jira/browse/NIFI-5318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16535709#comment-16535709
 ] 

ASF GitHub Bot commented on NIFI-5318:
--------------------------------------

Github user peter-gergely-horvath commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/2843#discussion_r200807442
  
    --- Diff: 
nifi-toolkit/nifi-toolkit-tls/src/main/java/org/apache/nifi/test/util/FileUtils.java
 ---
    @@ -0,0 +1,84 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *     http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +
    +
    +
    +package org.apache.nifi.test.util;
    +
    +import java.io.File;
    +import java.io.IOException;
    +import java.nio.file.*;
    +import java.nio.file.attribute.BasicFileAttributes;
    +import java.util.Arrays;
    +
    +public final class FileUtils {
    +
    +
    +    private static final String MAC_DS_STORE_NAME = ".DS_Store";
    --- End diff --
    
    I think this is probably fine: if you look at the code usages, it is used 
to avoid symlinking a Mac system directory; it should not have any side effect 
on other systems.


> Implement NiFi test harness
> ---------------------------
>
>                 Key: NIFI-5318
>                 URL: https://issues.apache.org/jira/browse/NIFI-5318
>             Project: Apache NiFi
>          Issue Type: New Feature
>            Reporter: Peter Horvath
>            Priority: Major
>
> Currently, it is not really possible to automatically test the behaviour of a 
> specific NiFi flow and make unit test type asserts if it works as expected. 
> For example, if the expected behaviour of a NiFi flow is that a file placed 
> to a specific directory will trigger some operation after which some output 
> file will appear at another directory, once currently can only do one thing: 
> test the NiFi flow manually. 
> Manual testing is especially hard to manage if a NiFi flow is being actively 
> developed: any change to a complex, existing NiFi flow might require a lot of 
> manual testing just to ensure there are no regressions introduced. 
> Some kind of Java API that allows managing a NiFi instance and manipulating 
> flow deployments like for example, [Codehaus 
> Cargo|]https://codehaus-cargo.github.io/] would be of great help. 
>  
>  
>  
>  



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