How to run embedded Tomcat 9 inside Maven 3 for integration testing purposes? - maven

Question

I am trying to run embedded Tomcat 9 inside Maven 3 for integration testing purposes. I was led to cargo-maven2-plugin by other SO answers.
So, attempting to follow the instructions found here:
https://codehaus-cargo.github.io/cargo/Static+deployment+of+WAR.html
I have this fragment in a simple POM:
<build>
<plugins>
<plugin>
<groupId>org.codehaus.cargo</groupId>
<artifactId>cargo-maven2-plugin</artifactId>
<version>1.7.6</version>
<configuration>
<container>
<containerId>tomcat9x</containerId>
<type>embedded</type>
</container>
<deployables>
<deployable>
<type>war</type>
<properties>
<file>path/to/myapp.war</file>
</properties>
</deployable>
</deployables>
</configuration>
</plugin>
</plugins>
</build>
Which I try to execute with mvn org.codehaus.cargo:cargo-maven2-plugin:run
It fails with the error:
[INFO] [en2.ContainerRunMojo] Resolved container artifact
org.codehaus.cargo:cargo-core-container-tomcat:jar:1.7.6 for container
tomcat9x [WARNING] The defined deployable has the same groupId and
artifactId as your project's main artifact but the type is different.
You've defined a [war] type wher eas the project's packaging is [pom].
This is possibly an error and as a consequence the plugin will try to
find this deployable in the project's dependencies.
How can I make this work? I just want to launch the given WAR in an embedded tomcat9, from within Maven.

Answer 1

After trying many permutations, this finally worked for me:
<plugin>
<groupId>org.codehaus.cargo</groupId>
<artifactId>cargo-maven2-plugin</artifactId>
<version>1.7.9</version>
<configuration>
<container>
<systemProperties>
<myvar1>${myEnvVar}</myvar1>
<myvar2>... stuff ...</myvar2>
</systemProperties>
<containerId>tomcat9x</containerId>
<zipUrlInstaller>
<url>https://repo.maven.apache.org/maven2/org/apache/tomcat/tomcat/9.0.29/tomcat-9.0.29.zip</url>
</zipUrlInstaller>
</container>
<deployables>
<deployable>
<groupId>org.codehaus.cargo</groupId>
<artifactId>simple-war</artifactId>
<type>war</type>
<location>path/to/myapp.war</location>
<properties>
<context>myapp</context>
</properties>
</deployable>
</deployables>
<executions>
<execution>
<id>start-server</id>
<phase>pre-integration-test</phase>
<goals>
<goal>start</goal>
</goals>
</execution>
<execution>
<id>stop-server</id>
<phase>post-integration-test</phase>
<goals>
<goal>stop</goal>
</goals>
</execution>
</executions>
</configuration>
</plugin>
Use the failsafe plugin to automatically run the Integration Tests between the start and stop:
<plugin>
<artifactId>maven-failsafe-plugin</artifactId>
<version>2.21.0</version>
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
<configuration>
</configuration>
</execution>
</executions>
</plugin>