@Test
public void listAgentContainersSourceImageIdNotSet() {

    DefaultDockerClientFacade facade = new DefaultDockerClientFacade(dockerClient);
    TestImage image = dockerClient.newLocalImage("image-1", "latest");
    Container container = new Container().
            label("foo", "bar").
            image(image);
    dockerClient.container(container);
    List<AgentHolderInfo> containers = facade.listAgentHolders("foo", "bar");
    assertThat(containers).isEmpty();
}