### Question:
FermaFlowPathRepository extends FermaGenericRepository<FlowPath, FlowPathData, FlowPathFrame> implements FlowPathRepository { @Override public Collection<FlowPath> findBySegmentDestSwitch(SwitchId switchId) { return framedGraph().traverse(g -> g.V() .hasLabel(PathSegmentFrame.FRAME_LABEL) .has(PathSegmentFrame.DST_SWITCH_ID_PROPERTY, SwitchIdConverter.INSTANCE.toGraphProperty(switchId)) .in(FlowPathFrame.OWNS_SEGMENTS_EDGE) .hasLabel(FlowPathFrame.FRAME_LABEL)) .toListExplicit(FlowPathFrame.class).stream() .map(FlowPath::new) .collect(Collectors.toList()); } FermaFlowPathRepository(FramedGraphFactory<?> graphFactory, TransactionManager transactionManager); @Override Collection<FlowPath> findAll(); @Override Optional<FlowPath> findById(PathId pathId); @Override Optional<FlowPath> findByFlowIdAndCookie(String flowId, FlowSegmentCookie cookie); @Override Collection<FlowPath> findByFlowId(String flowId); @Override Collection<FlowPath> findByFlowGroupId(String flowGroupId); @Override Collection<PathId> findPathIdsByFlowGroupId(String flowGroupId); @Override Collection<FlowPath> findActualByFlowIds(Set<String> flowIds); @Override Collection<FlowPath> findBySrcSwitch(SwitchId switchId, boolean includeProtected); @Override Collection<FlowPath> findByEndpointSwitch(SwitchId switchId, boolean includeProtected); @Override Collection<FlowPath> findBySegmentSwitch(SwitchId switchId); @Override Collection<FlowPath> findInactiveBySegmentSwitch(SwitchId switchId); @Override Collection<FlowPath> findBySegmentSwitchWithMultiTable(SwitchId switchId, boolean multiTable); @Override Collection<FlowPath> findWithPathSegment(SwitchId srcSwitchId, int srcPort,
                                                    SwitchId dstSwitchId, int dstPort); @Override Collection<FlowPath> findBySegmentDestSwitch(SwitchId switchId); @Override Collection<FlowPath> findBySegmentEndpoint(SwitchId switchId, int port); @Override void updateStatus(PathId pathId, FlowPathStatus pathStatus); @Override long getUsedBandwidthBetweenEndpoints(SwitchId srcSwitchId, int srcPort, SwitchId dstSwitchId, int dstPort); @Override Optional<FlowPath> remove(PathId pathId);  }### Answer:
@Test public void shouldFindPathBySegmentDestSwitch() { FlowPath flowPath = createTestFlowPathWithIntermediate(switchC, 100); flow.setForwardPath(flowPath); Collection<FlowPath> foundPaths = flowPathRepository.findBySegmentDestSwitch(switchC.getSwitchId()); assertThat(foundPaths, hasSize(1)); }
@Test public void shouldNotFindPathByWrongSegmentDestSwitch() { FlowPath flowPath = createTestFlowPathWithIntermediate(switchC, 100); flow.setForwardPath(flowPath); Collection<FlowPath> foundPaths = flowPathRepository.findBySegmentDestSwitch(switchA.getSwitchId()); assertThat(foundPaths, Matchers.empty()); }