@Test
public void testContainerLogs() throws IOException {

  WebResource r = resource();
  final ContainerId containerId = BuilderUtils.newContainerId(0, 0, 0, 0);
  final String containerIdStr = BuilderUtils.newContainerId(0, 0, 0, 0)
      .toString();
  final ApplicationAttemptId appAttemptId = containerId.getApplicationAttemptId();
  final ApplicationId appId = appAttemptId.getApplicationId();
  final String appIdStr = appId.toString();
  final String filename = "logfile1";
  final String logMessage = "log message\n";
  nmContext.getApplications().put(appId, new ApplicationImpl(null, "user",
      appId, null, nmContext));
  
  MockContainer container = new MockContainer(appAttemptId,
      new AsyncDispatcher(), new Configuration(), "user", appId, 1);
  container.setState(ContainerState.RUNNING);
  nmContext.getContainers().put(containerId, container);
  
  // write out log file
  Path path = dirsHandler.getLogPathForWrite(
      ContainerLaunch.getRelativeContainerLogDir(
          appIdStr, containerIdStr) + "/" + filename, false);
  
  File logFile = new File(path.toUri().getPath());
  logFile.deleteOnExit();
  assertTrue("Failed to create log dir", logFile.getParentFile().mkdirs());
  PrintWriter pw = new PrintWriter(logFile);
  pw.print(logMessage);
  pw.close();
  // ask for it
  ClientResponse response = r.path("ws").path("v1").path("node")
      .path("containerlogs").path(containerIdStr).path(filename)
      .accept(MediaType.TEXT_PLAIN).get(ClientResponse.class);
  String responseText = response.getEntity(String.class);
  assertEquals(logMessage, responseText);
  
  // ask for file that doesn't exist
  response = r.path("ws").path("v1").path("node")
      .path("containerlogs").path(containerIdStr).path("uhhh")
      .accept(MediaType.TEXT_PLAIN).get(ClientResponse.class);
  Assert.assertEquals(Status.NOT_FOUND.getStatusCode(), response.getStatus());
  responseText = response.getEntity(String.class);
  assertTrue(responseText.contains("Cannot find this log on the local disk."));
  
  // After container is completed, it is removed from nmContext
  nmContext.getContainers().remove(containerId);
  Assert.assertNull(nmContext.getContainers().get(containerId));
  response =
      r.path("ws").path("v1").path("node").path("containerlogs")
          .path(containerIdStr).path(filename).accept(MediaType.TEXT_PLAIN)
          .get(ClientResponse.class);
  responseText = response.getEntity(String.class);
  assertEquals(logMessage, responseText);
}