### Question:
DockerJavaAutoConfiguration { @Bean @ConditionalOnMissingBean(DockerClientConfig.class) public DockerClientConfig dockerClientConfig() { DefaultDockerClientConfig.Builder builder = DefaultDockerClientConfig.createDefaultConfigBuilder(); if (!StringUtils.isEmpty(dockerClientProperties.getApiVersion())) builder.withApiVersion(dockerClientProperties.getApiVersion()); if (!StringUtils.isEmpty(dockerClientProperties.getDockerConfig())) builder.withDockerConfig(dockerClientProperties.getDockerConfig()); if (!StringUtils.isEmpty(dockerClientProperties.getDockerHost())) builder.withDockerHost(dockerClientProperties.getDockerHost()); if (!StringUtils.isEmpty(dockerClientProperties.getRegistryUrl())) builder.withRegistryUrl(dockerClientProperties.getRegistryUrl()); if (!StringUtils.isEmpty(dockerClientProperties.getRegistryEmail())) builder.withRegistryEmail(dockerClientProperties.getRegistryEmail()); if (!StringUtils.isEmpty(dockerClientProperties.getRegistryPassword())) builder.withRegistryPassword(dockerClientProperties.getRegistryPassword()); if (!StringUtils.isEmpty(dockerClientProperties.getRegistryUsername())) builder.withRegistryUsername(dockerClientProperties.getRegistryUsername()); if (!StringUtils.isEmpty(dockerClientProperties.getDockerCertPath())) builder.withDockerCertPath(dockerClientProperties.getDockerCertPath()); if (!StringUtils.isEmpty(dockerClientProperties.getApiVersion())) builder.withApiVersion(dockerClientProperties.getApiVersion()); if (dockerClientProperties.getDockerTlsVerify() != null) builder.withDockerTlsVerify(dockerClientProperties.getDockerTlsVerify()); if (!CollectionUtils.isEmpty(dockerClientProperties.getConfig())) builder.withProperties(dockerClientProperties.getConfig()); return builder.build(); }  @Bean @ConditionalOnMissingBean(DockerClientConfig.class) DockerClientConfig dockerClientConfig(); @Bean @ConditionalOnMissingBean(DockerClientBuilder.class) DockerClientBuilder dockerClientBuilder(); @Bean @ConditionalOnMissingBean(DockerClient.class) DockerClient dockerJavaClient();  }### Answer:
@Test public void dockerClientConfig() { Assert.assertNotNull(dockerClientConfig); }