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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-626) create an iterator fuzz tester
Date Mon, 09 Nov 2015 18:37:11 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14997079#comment-14997079
] 

ASF GitHub Bot commented on ACCUMULO-626:
-----------------------------------------

Github user joshelser commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/50#discussion_r44311676
  
    --- Diff: iterator-test-harness/src/main/java/org/apache/accumulo/iteratortest/IteratorTestCaseFinder.java
---
    @@ -0,0 +1,61 @@
    +/*
    + * 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.accumulo.iteratortest;
    +
    +import java.lang.reflect.Modifier;
    +import java.util.ArrayList;
    +import java.util.List;
    +import java.util.Set;
    +
    +import org.apache.accumulo.iteratortest.testcases.IteratorTestCase;
    +import org.reflections.Reflections;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +/**
    + * A class to ease finding published test cases.
    + */
    +public class IteratorTestCaseFinder {
    +  private static final Logger log = LoggerFactory.getLogger(IteratorTestCaseFinder.class);
    +
    +  /**
    +   * Instantiates all test cases provided.
    +   *
    +   * @return A list of {@link IteratorTestCase}s.
    +   */
    +  public static List<IteratorTestCase> findAllTestCases() {
    +    log.info("Searching {}", IteratorTestCase.class.getPackage().getName());
    +    Reflections reflections = new Reflections(IteratorTestCase.class.getPackage().getName());
    --- End diff --
    
    Yeah, like I hinted at above, this was a quick hack to get this functionality and I hope
to remove it (despite being a very nice library to use). Ideally, I'd not need any extra dependencies
to do it (currently don't have any deps outside of accumulo-core, junit and slf4j that I recall),
and I'd prefer to leave it that way. If it's hard to do with regular reflection libs, Guava
sounds like a nice choice. Thanks for the recommendation.


> create an iterator fuzz tester
> ------------------------------
>
>                 Key: ACCUMULO-626
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-626
>             Project: Accumulo
>          Issue Type: New Feature
>          Components: test
>            Reporter: Eric Newton
>            Assignee: Josh Elser
>
> Users often write iterators without fully understanding its limits and lifetime. Accumulo
should have an iterator fuzz-tester which will take user data and run the iterator under extreme
conditions.  For example, it should re-create and re-seek the iterator with every key returned.
 It could automatically compare results of such a run with the naive run, which seeks to the
beginning and scans all the data.



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