A few months ago I had written about how one can setup a PostgreSQL database in a docker container during the Maven testing phase (part 1 and part 2). Today, I wanted to iterate on this topic using Testcontainers. Unfortunately, before I could get to that I ran into issues with the original project. For some reason I was now getting the following error:

Caused by: java.lang.RuntimeException: Driver org.postgresql.Driver claims to not accept jdbcUrl, jdbc:postgresql://localhost:${it-database.port}/docker_db_testing_tests

Maven did not replace the variable it-database in the integration test application.properties file. The question is: "why now"? It has worked before. Now, one thing that I changed is that this time I was using Linux instead of Windows. Either way, the fix was simple, although not obvious. It seems to be an issue with the Maven Failsafe plugin.

Not working:

<configuration>
    <environmentVariables>
        <it-database.port>${it-database.port}</it-database.port>
    </environmentVariables>
</configuration>

Working:

<configuration>
    <systemPropertyVariables>
        <it-database.port>${it-database.port}</it-database.port>
    </systemPropertyVariables>
</configuration>

Here is the link to the commit.