Add unit tests for roleArn validation when stsEnabled is true

[Copilot]

The validate() method in LambdaInvokerConfig throws ConfigException when stsEnabled=true but roleArn is blank — this fail-fast behavior had no test coverage.

Changes

• New test YAML configs in src/test/resources/config/:

  • lambda-invoker-sts-no-role.yml — stsEnabled: true, roleArn blank
  • lambda-invoker-sts-with-role.yml — stsEnabled: true, roleArn set to a valid ARN

• Two new tests in LambdaInvokerConfigTest:

  • testStsEnabledWithoutRoleArnThrowsConfigException — asserts ConfigException is thrown on load
  • testStsEnabledWithRoleArnSucceeds — asserts clean load and correct roleArn value

@Test
public void testStsEnabledWithoutRoleArnThrowsConfigException() {
    assertThrows(ConfigException.class, () -> LambdaInvokerConfig.load("lambda-invoker-sts-no-role"),
            "ConfigException was not thrown despite stsEnabled=true with blank roleArn");
}

@Test
public void testStsEnabledWithRoleArnSucceeds() {
    LambdaInvokerConfig stsConfig = LambdaInvokerConfig.load("lambda-invoker-sts-with-role");
    assertNotNull(stsConfig);
    assertEquals("arn:aws:iam::123456789012:role/TestRole", stsConfig.getRoleArn());
}

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[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• central.sonatype.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.13/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.13/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.13 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.13/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/light-aws-lambda/light-aws-lambda/lambda-invoker org.codehaus.plexus.classworlds.launcher.Launcher test -pl . -Dtest=LambdaInvokerConfigTest (dns block)
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.13/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.13/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.13 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.13/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/light-aws-lambda/light-aws-lambda org.codehaus.plexus.classworlds.launcher.Launcher -f pom.xml -B -V -e -Dfindbugs.skip -Dcheckstyle.skip -Dpmd.skip=true -Dspotbugs.skip -Denforcer.skip -Dmaven.javadoc.skip (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)