### Question:
AwsRDSPlatform extends Platform { @Override public ApiStatus getApiStatus () { try { amazonRDS.describeDBInstances(); amazonRDS.describeDBClusters(); return ApiStatus.OK; } catch (RuntimeException e) { log.error("API for AWS RDS failed to resolve.", e); return ApiStatus.ERROR; } } @Autowired  AwsRDSPlatform();   AwsRDSPlatform(AmazonRDS amazonRDS, AmazonEC2 amazonEC2); Map<String, String> getVpcToSecurityGroupMap(); @Override ApiStatus getApiStatus(); @Override PlatformLevel getPlatformLevel(); @Override PlatformHealth getPlatformHealth(); @Override List<Container> generateExperimentRoster(); @Override boolean isContainerRecycled(Container container); Map<String, String> getFilter(); void setFilter(Map<String, String> filter); void failoverCluster(String dbClusterIdentifier); void restartInstance(String... dbInstanceIdentifiers); Set<String> getClusterInstances(String dbClusterIdentifier); ContainerHealth getInstanceStatus(String... dbInstanceIdentifiers); void setVpcSecurityGroupIds(String dbInstanceIdentifier, String vpcSecurityGroupId); void setVpcSecurityGroupIds(String dbInstanceIdentifier, Collection<String> vpcSecurityGroupIds); ContainerHealth checkVpcSecurityGroupIds(String dbInstanceIdentifier, Collection<String> vpcSecurityGroupIds); Collection<String> getVpcSecurityGroupIds(String dbInstanceIdentifier); String getChaosSecurityGroup(String dbInstanceIdentifier); DBSnapshot snapshotDBInstance(String dbInstanceIdentifier); DBClusterSnapshot snapshotDBCluster(String dbClusterIdentifier); void deleteInstanceSnapshot(DBSnapshot dbSnapshot); void deleteClusterSnapshot(DBClusterSnapshot dbClusterSnapshot); boolean isInstanceSnapshotRunning(String dbInstanceIdentifier); boolean isClusterSnapshotRunning(String dbClusterIdentifier);  }### Answer:
@Test public void getApiStatus () { when(amazonRDS.describeDBInstances()).thenReturn(null); when(amazonRDS.describeDBClusters()).thenReturn(null); assertEquals(ApiStatus.OK, awsRDSPlatform.getApiStatus()); Mockito.reset(amazonRDS); when(amazonRDS.describeDBInstances()).thenThrow(mock(RuntimeException.class)); assertEquals(ApiStatus.ERROR, awsRDSPlatform.getApiStatus()); Mockito.reset(amazonRDS); when(amazonRDS.describeDBInstances()).thenReturn(null); when(amazonRDS.describeDBClusters()).thenThrow(mock(RuntimeException.class)); assertEquals(ApiStatus.ERROR, awsRDSPlatform.getApiStatus()); }