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Running tests in parallel with a reasonable memory usage

export MAVEN_OPTS="-Xmx1024m"
export NODE_OPTIONS="--max_old_space_size=4096"
export SUREFIRE_JAVA_OPTS="-Xmx1200m -Xss256k -XX:+ExitOnOutOfMemoryError"

# Compile and install all modules, skip packaging artifacts not needed for tests
mvn clean install -T6 -DskipTests -Dpkg.skip=true

mvn test -pl='!application,!dao,!ui-ngx,!msa/js-executor,!msa/web-ui' -T4
mvn test -pl='msa/js-executor'
mvn test -pl dao -Dparallel=packages -DforkCount=4

mvn test -pl application -Dtest='!**/nosql/**,org.thingsboard.server.controller.**'      -DforkCount=6 -Dparallel=classes  -Dsurefire.rerunFailingTestsCount=2 -Dsurefire.failOnFlakeCount=5
mvn test -pl application -Dtest='!**/nosql/**,org.thingsboard.server.edge.**'            -DforkCount=4 -Dparallel=packages -Dsurefire.rerunFailingTestsCount=2 -Dsurefire.failOnFlakeCount=5
mvn test -pl application -Dtest='!**/nosql/**,org.thingsboard.server.service.**'         -DforkCount=6 -Dparallel=packages -Dsurefire.rerunFailingTestsCount=2 -Dsurefire.failOnFlakeCount=5
mvn test -pl application -Dtest='!**/nosql/**,org.thingsboard.server.transport.mqtt.**'  -DforkCount=6 -Dparallel=classes  -Dsurefire.rerunFailingTestsCount=2 -Dsurefire.failOnFlakeCount=5
mvn test -pl application -Dtest='!**/nosql/**,org.thingsboard.server.transport.coap.**'  -DforkCount=6 -Dparallel=classes  -Dsurefire.rerunFailingTestsCount=2 -Dsurefire.failOnFlakeCount=5
mvn test -pl application -Dtest='!**/nosql/**,org.thingsboard.server.transport.lwm2m.**' -DforkCount=6 -Dparallel=packages -Dsurefire.rerunFailingTestsCount=2 -Dsurefire.failOnFlakeCount=5
mvn test -pl application -Dtest='**/*TestSuite.java'                                     -DforkCount=4 -Dparallel=classes  -Dsurefire.rerunFailingTestsCount=2 -Dsurefire.failOnFlakeCount=5

#the rest of application tests
mvn test -pl application -Dtest='
!**/nosql/**,
!org.thingsboard.server.controller.**,
!org.thingsboard.server.edge.**,
!org.thingsboard.server.service.**,
!org.thingsboard.server.transport.mqtt.**,
!org.thingsboard.server.transport.coap.**,
!org.thingsboard.server.transport.lwm2m.**,
!**/*TestSuite.java
' -DforkCount=6 -Dparallel=packages -Dsurefire.rerunFailingTestsCount=2 -Dsurefire.failOnFlakeCount=5

pkg.skip.* flags reference

Use -Dpkg.skip=true to skip all packaging at once (equivalent to all four flags below).

Flag Skips Safe to skip for tests?
-Dpkg.skip=true All of the below (bootjar + deb + rpm + zip) Yes
-Dpkg.skip.bootjar=true spring-boot:repackage (*-boot.jar) Yes — tests use the regular .jar, not the fat boot jar
-Dpkg.skip.deb=true Gradle buildDeb + Maven attach-artifact Yes — MSA docker modules copy the DEB from target/ directly
-Dpkg.skip.rpm=true Gradle buildRpm Yes — no test depends on the RPM
-Dpkg.skip.zip=true maven-assembly-plugin Windows ZIP Yes — no test depends on the ZIP

Testcontainers compatibility with the Docker API workaround

In case your tests failed to run testcontainers due to unsupported Docker API version

☕ testcontainers (Docker API 1.32) + 🐳 docker 29 (min API 1.44) workaround

Add to /etc/docker/daemon.json and restart docker

{
  "min-api-version": "1.32"
}

Same works on Mac, except daemon.json are located in another folder and required to be edited from Docker Desktop UI.

Tip: If your testcontainer are struggling to find any Docker. You can try to remove the testcontainers property file. It will be recreated on the next testcontainers run.

rm ~/.testcontainers.properties