### Question:
JibExtension { @Input @Optional public String getContainerizingMode() { String property = System.getProperty(PropertyNames.CONTAINERIZING_MODE); return property != null ? property : containerizingMode.get(); } JibExtension(Project project); void from(Action<? super BaseImageParameters> action); void to(Action<? super TargetImageParameters> action); void container(Action<? super ContainerParameters> action); void extraDirectories(Action<? super ExtraDirectoriesParameters> action); void dockerClient(Action<? super DockerClientParameters> action); void outputPaths(Action<? super OutputPathsParameters> action); void skaffold(Action<? super SkaffoldParameters> action); void pluginExtensions(Action<? super ExtensionParametersSpec> action); void setAllowInsecureRegistries(boolean allowInsecureRegistries); void setContainerizingMode(String containerizingMode); @Nested @Optional BaseImageParameters getFrom(); @Nested @Optional TargetImageParameters getTo(); @Nested @Optional ContainerParameters getContainer(); @Nested @Optional ExtraDirectoriesParameters getExtraDirectories(); @Nested @Optional DockerClientParameters getDockerClient(); @Nested @Optional OutputPathsParameters getOutputPaths(); @Nested @Optional SkaffoldParameters getSkaffold(); @Input @Optional String getContainerizingMode(); @Nested @Optional ListProperty<ExtensionParameters> getPluginExtensions();  }### Answer:
@Test public void testContainerizingMode() { Assert.assertEquals("exploded", testJibExtension.getContainerizingMode()); }