JDoop wrapper for benchmarking
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This is an infrastructure for comparison of JDoop against other Java test case generation tools, namely Randoop (and currently working on supporting EvoSuite too) on the SF110 suite of software from the SourceForge repository.

The infrastructure facilitates reproducible research as the testing tools run in pristine Linux containers that can be rebuilt from scratch, always with exactly the same versions of all software dependencies. Furthermore, all containers get dedicated CPU cores and a certain amount of memory.

jdoop-wrapper is built around Apache Spark, a cluster computation framework.


There are a few constants to tweak before you start using jdoop-wrapper:

  • In spark/conf/slaves replace machine names with those that you will be using in your cluster. They will all have to follow a name pattern. Also see spark/driver/src/main/scala/jdoop/Constants.scala.
  • The number of tools/benchmarks that can run in parallel on a slave/worker node is specified in spark/conf/spark-env-slave.sh.
  • The number of CPU cores and memory per Linux container is given in spark/driver/src/main/scala/jdoop/Constants.scala.
  • For the directories where results are stored, also change spark/driver/src/main/scala/jdoop/Constants.scala accordingly.
  • To configure which of the testing tools to use, on what benchmarks, and how many different runs there should be to accommodate for randomness, change the last part of spark/start-spark-app.sh.


The main part of the infrastructure is a Spark application. To prepare all cluster nodes with needed software and configuration, run:


This was tested on Ubuntu 16.04.1 LTS as the host machine. Linux containers run a testing version of GNU/Linux Debian Stretch.

The application can be started with:


You may want to run both of these tools in something like GNU Screen for convenience.

Analyzing results

To analyze results once the Spark application finishes with its execution, you can use several scripts available in the stats directory:

  • The main tool that aggregates all statistics - branch and instruction coverage, cyclomatic complexity, and the number of generated test cases - is stats.scala. For example, if your want to see results for JDoop and they are in /mnt/storage/sf110-results/jdoop-ten-runs, where you had 5 runs for each benchmark for an hour, change to that directory and run:
    /path/to/jdoop-wrapper/spark/stats/stats.scala 0/3600 1/3600 2/3600 3/3600 4/3600
  • To find benchmarks and runs that failed, use find-failed-benchmarks.scala:
    /path/to/jdoop-wrapper/spark/stats/find-failed-benchmarks.scala 0/3600 1/3600 2/3600 3/3600 4/3600
  • If you are interested in how much each benchmark for each tool took (because other than generating test cases in e.g. an hour, the infrastructure also compiles the test cases and runs them to measure code coverage), run:
    /path/to/jdoop-wrapper/spark/stats/print-total-times-sorted.scala .


In developing this infrastructure and evaluating the testing tools, we have been using Emulab, a network testbed developed and provided by the Flux Research Group at the University of Utah.


Copyright 2017 Marko Dimjašević

This file is part of jdoop-wrapper.

jdoop-wrapper is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

jdoop-wrapper is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License along with jdoop-wrapper. If not, see http://www.gnu.org/licenses/.

Dependencies for jdoop-wrapper, i.e. Apache Spark and the testing tools, are free software. See their licenses for details.