Maven test doesn't run tests - scala

Question

I have a Scala project where I replaced SBT with maven.
I have the following pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>myProjectName</groupId>
<artifactId>my.package.myProjectName</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name></name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.apache.spark/spark-core_2.10 -->
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.10</artifactId>
<version>1.6.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.scalatest/scalatest_2.11 -->
<dependency>
<groupId>org.scalatest</groupId>
<artifactId>scalatest_2.11</artifactId>
<version>3.0.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.typesafe.akka/akka-testkit_2.11 -->
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-testkit_2.11</artifactId>
<version>2.4.14</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.typesafe.akka/akka-http-testkit_2.11 -->
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-http-testkit_2.11</artifactId>
<version>10.0.0</version>
</dependency>
</dependencies>
</project>
For clarity, I removed some of the dependencies in the text above.
The problem is that when I run mvn test none of my tests are executed.
The tests are located under src/test/scala/my/package.
They don't contain test in their names, but even if I add Test at the end of their names, they aren't run.

Answer 1

To compile and test scala sources you should add the scala-maven-plugin to your build.
<project>
...
<build>
<sourceDirectory>src/main/scala</sourceDirectory>
<testSourceDirectory>src/test/scala</testSourceDirectory>
...
<plugins>
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>scala-maven-plugin</artifactId>
<version>3.2.1</version>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<!-- explicit scala version not recommended-->
<!-- usually inferred from scala-library dependency-->
<configuration>
<scalaVersion>${scala.version}</scalaVersion>
</configuration>
</plugin>
</plugins>
</build>
</project>