SystemProperties from maven failsafe plugin with Spock Tests

Question

I am trying to get maven failsafe to execute my integration tests, however I am having a problem with the server port being correctly assigned to the system properties.

My failsafe plugin configuration:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-failsafe-plugin</artifactId>
    <version>2.21.0</version>
    <executions>
        <execution>
            <id>integration-tests</id>
            <goals>
                <goal>integration-test</goal>
                <goal>verify</goal>
            </goals>
            <configuration>
                <useSystemClassLoader>false</useSystemClassLoader>
                <systemPropertyVariables>
                    <test.server.port>${tomcat.http.port}</test.server.port>
                </systemPropertyVariables>
                <skipTests>${skip.integration.tests}</skipTests>
            </configuration>
        </execution>
    </executions>
</plugin>

My spock test configuration:

def "verifies port is being set correctly"() {
    expect:
    System.getProperties().getProperty('test.server.port') != null
}

When I run the test, test.server.port does not appear in my system properties array. However, if I change it to asdf or anything NOT test.server.port, it then appears in my system properties.

Answer 1

The fix was to use Spring Boot's random port for environment initialization

@SpringBootTest(
        classes = OrderQueueApplication.class,
        webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT
)