pme123 / camunda-dmn-tester

Project to test (Camunda)-DMN Tables.

Version Matrix

Maven Central GitHub repo size Docker Pulls

Camunda DMN Table Tester

A little DMN Table tester with the following Goals:

  • As a developer I want to test the DMNs that I get from the Business, even not knowing the concrete rules.
  • Business people can create their own tests.
  • They can easily adjust the tests to the dynamic nature of DMN Tables.


I wrote two blog article that explains how you can use it:

Testing (Camunda)-DMN Tables automatically

Use the DMN Tester for Continuous Integration CI


This projects builds on cool Open Source Projects. So my thanks go to:


  • Autowire:

    Autowire is a pair of macros that allows you to perform type-safe, reflection-free RPC between Scala systems.

  • BooPickle:

    BooPickle is the fastest and most size efficient serialization (aka pickling) library that works on both Scala and Scala.js.


  • Slinky

    Write React apps in Scala just like you would in ES6

  • Scalably Typed

    The Javascript ecosystem for Scala.js! I used the facades for Ant Design

  • Ant Design

    A design system for enterprise-level products. Create an efficient and enjoyable work experience.


  • Scala DMN

    An engine to execute decisions according to the DMN 1.1 specification.

  • http4s

    Typeful, functional, streaming HTTP for Scala.

  • ZIO Config

    A functional, composable ZIO interface to configuration

  • ZIO

    Type-safe, composable asynchronous and concurrent programming for Scala

Start Script

  • Ammonite

    Ammonite lets you use the Scala language for scripting purposes: in the REPL, as scripts, as a library to use in existing projects, or as a standalone systems shell.



sbt server/run

This starts the Web Server on Port 8883.

This copies the client assets to the classpath of the server. So make sure you run build before.

Or use the client as described in the next chapter.


sbt dev

This will watch all your changes in the client and automatically refresh your Browser Session.

Open in the Browser http://localhost:8024.



At the moment there are 2 steps:

  1. Build the Client (full optimization) and the Server:

    sbt release

  2. Publish:

    sbt publishLocal or sbt publishSigned

publishSigned will publish to Maven Central - see


There are 2 Docker Images:

  1. The DMN Tester App:

    sbt server/docker:publishLocal creates a Docker Image - see also next chapter.

  2. The Unit Test Creator: See its

Try it out

There are Docker Images you can use with an example in the demo directory.

cd demo

See the according README