### Question:
GcpComputePlatform extends Platform implements SshBasedExperiment<GcpComputeInstanceContainer> { private String recreateInstanceInZoneInstanceGroup (String instanceName, String group) { ProjectZoneInstanceGroupManagerName projectZoneInstanceGroupManagerName = ProjectZoneInstanceGroupManagerName.parse( group); InstanceGroupManagersRecreateInstancesRequest request; request = InstanceGroupManagersRecreateInstancesRequest.newBuilder().addInstances(instanceName).build(); Operation operation = getInstanceGroupManagerClient().recreateInstancesInstanceGroupManager( projectZoneInstanceGroupManagerName, request); log.debug("Operation to recreate instance created: {}", v("operation", operation)); return operation.getSelfLink(); }  void setRoutableCIDRBlocks(Collection<String> routableCIDRBlocks); @Override ApiStatus getApiStatus(); @Override PlatformLevel getPlatformLevel(); @Override PlatformHealth getPlatformHealth(); Collection<Items> getIncludeFilter(); void setIncludeFilter(Map<String, String> includeFilter); Collection<Items> getExcludeFilter(); void setExcludeFilter(Map<String, String> excludeFilter); @Override boolean isContainerRecycled(Container container); String stopInstance(GcpComputeInstanceContainer container); ContainerHealth isContainerRunning(GcpComputeInstanceContainer gcpComputeInstanceContainer); String simulateMaintenance(GcpComputeInstanceContainer container); String setTags(GcpComputeInstanceContainer container, List<String> tags); String setTagsSafe(GcpComputeInstanceContainer container, List<String> newTags, String oldFingerprint); boolean isContainerGroupAtCapacity(GcpComputeInstanceContainer container); boolean checkTags(GcpComputeInstanceContainer container, List<String> expectedTags); void startInstance(GcpComputeInstanceContainer container); String restartContainer(GcpComputeInstanceContainer container); String getBestEndpoint(String privateIPAddress, String publicIPAddress); boolean isAddressRoutable(String privateIPAddress); String getLatestInstanceId(String instanceName, String zone); Fingerprint<List<String>> getFirewallTags(GcpComputeInstanceContainer container); void setProjectId(String projectId); @Override String getEndpoint(GcpComputeInstanceContainer container); @Override SSHCredentials getSshCredentials(GcpComputeInstanceContainer container); @Override String getRunningDirectory(); @Override void recycleContainer(GcpComputeInstanceContainer container); String recreateInstanceInInstanceGroup(GcpComputeInstanceContainer container); boolean isOperationComplete(String operationId);  }### Answer:
@Test public void recreateInstanceInZoneInstanceGroup () { String uuid = "12345678901234567890"; String instanceName = "my-awesome-instance"; String zone = "my-datacenter"; String instanceGroup = "my-high-availability-group"; ProjectZoneInstanceGroupManagerName groupManagerName = ProjectZoneInstanceGroupManagerName.of(instanceGroup, MY_AWESOME_PROJECT, zone); String createdBy = groupManagerName.toString(); GcpComputeInstanceContainer container = GcpComputeInstanceContainer.builder() .withCreatedBy(createdBy) .withZone(zone) .withPlatform(gcpComputePlatform) .withInstanceName(instanceName) .withUniqueIdentifier(uuid) .build(); ArgumentCaptor<InstanceGroupManagersRecreateInstancesRequest> request = ArgumentCaptor.forClass( InstanceGroupManagersRecreateInstancesRequest.class); String operationSelfLink = "my-operation-self-link"; Operation operation = Operation.newBuilder().setSelfLink(operationSelfLink).build(); doReturn(operation).when(instanceGroupManagerClient) .recreateInstancesInstanceGroupManager(any(ProjectZoneInstanceGroupManagerName.class), request.capture()); assertEquals(operationSelfLink, gcpComputePlatform.recreateInstanceInInstanceGroup(container)); assertThat(request.getValue().getInstancesList(), containsInAnyOrder(ProjectZoneInstanceName.of(instanceName, MY_AWESOME_PROJECT, zone).toString())); }