### Question:
AwsEC2Platform extends Platform implements SshBasedExperiment<AwsEC2Container> { public boolean isContainerTerminated (String instanceId) { return amazonEC2.describeInstances(new DescribeInstancesRequest().withInstanceIds(instanceId)) .getReservations() .stream() .map(Reservation::getInstances) .flatMap(Collection::stream) .anyMatch(instance -> instance.getState().getCode() == AwsEC2Constants.AWS_TERMINATED_CODE); } @Autowired  AwsEC2Platform(AmazonEC2 amazonEC2, ContainerManager containerManager, AwsEC2SelfAwareness awsEC2SelfAwareness); private  AwsEC2Platform(); void setFilter(@NotNull Map<String, List<String>> filter); void setGroupingTags(List<String> groupingTags); void setSSHPrivateKeys(@NotNull Map<String, String> sshPrivateKeys); Map<String, String> getImageIdToUsernameMap(); void setImageIdToUsernameMap(Map<String, String> imageIdToUsernameMap); @Override ApiStatus getApiStatus(); @JsonIgnore Collection<SubnetUtils.SubnetInfo> getRoutableCidrBlocks(); void setRoutableCidrBlocks(Collection<String> routableCidrBlocks); boolean isAddressRoutable(String privateIPAddress); @Override PlatformLevel getPlatformLevel(); @Override PlatformHealth getPlatformHealth(); @Override List<Container> generateRoster(); @Override boolean isContainerRecycled(Container container); ContainerHealth checkHealth(String instanceId); void stopInstance(String... instanceIds); void terminateInstance(String... instanceIds); void startInstance(String... instanceIds); void restartInstance(String... instanceIds); void setSecurityGroupIds(String networkInterfaceId, Collection<String> securityGroupIds); String getChaosSecurityGroupForInstance(String instanceId); boolean isContainerTerminated(String instanceId); boolean isAutoscalingGroupAtDesiredInstances(String autoScalingGroupName); boolean hasKey(String keyName); @Override void recycleContainer(AwsEC2Container container); void triggerAutoscalingUnhealthy(String instanceId); @Override String getEndpoint(AwsEC2Container container); @Override SSHCredentials getSshCredentials(AwsEC2Container container); boolean isStarted(AwsEC2Container awsEC2Container); Map<String, Set<String>> getNetworkInterfaceToSecurityGroupsMap(String instanceId); boolean verifySecurityGroupIdsOfNetworkInterfaceMap(String instanceId, Map<String, Set<String>> originalSecurityGroups);  }### Answer:
@Test public void isContainerTerminatedTrue () { String instanceId = randomUUID().toString(); DescribeInstancesResult describeInstancesResult = new DescribeInstancesResult().withReservations(new Reservation() .withInstances(new Instance().withInstanceId(instanceId).withState(new InstanceState().withCode(AwsEC2Constants.AWS_TERMINATED_CODE)))); doReturn(describeInstancesResult).when(amazonEC2).describeInstances(new DescribeInstancesRequest().withInstanceIds(instanceId)); assertTrue("One instance returned in terminated state should return true", awsEC2Platform.isContainerTerminated(instanceId)); describeInstancesResult = new DescribeInstancesResult().withReservations(new Reservation().withInstances(new Instance() .withInstanceId(instanceId) .withState(new InstanceState().withCode(AwsEC2Constants.AWS_RUNNING_CODE)))); doReturn(describeInstancesResult).when(amazonEC2).describeInstances(new DescribeInstancesRequest().withInstanceIds(instanceId)); assertFalse("One instance returned in running state should return false", awsEC2Platform.isContainerTerminated(instanceId)); }