## Running tests in parallel with a reasonable memory usage

```bash
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

:coffee: testcontainers (Docker API 1.32) + :whale: docker 29 (min API 1.44) workaround

Add to /etc/docker/daemon.json and restart docker
```json
{
  "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.
```bash
rm ~/.testcontainers.properties
```