@Test
	public void testShutdownNonExistingContainer() throws Exception {
		String containerId = "random";
		mockMvc.perform(delete("/runtime/containers").param("containerId", containerId)).andExpect(
				status().isNotFound()).andExpect(
				jsonPath("$[0].message", Matchers.is("Container could not be found with id " + containerId)));
	}
Tests REST compliance of containers endpoint.

@author Ilayaperumal Gopinathan
@author Mark Fisher
@author David Turanski
@author Gunnar Hillert
spring-xd-dirt/src/test/java/org/springframework/xd/dirt/rest/ContainersControllerIntegrationTests.java