### Question:
FermaFlowPathRepository extends FermaGenericRepository<FlowPath, FlowPathData, FlowPathFrame> implements FlowPathRepository { @Override public Optional<FlowPath> findByFlowIdAndCookie(String flowId, FlowSegmentCookie cookie) { List<? extends FlowPathFrame> flowPathFrames = framedGraph().traverse(g -> g.V() .hasLabel(FlowPathFrame.FRAME_LABEL) .has(FlowPathFrame.FLOW_ID_PROPERTY, flowId) .has(FlowPathFrame.COOKIE_PROPERTY, FlowSegmentCookieConverter.INSTANCE.toGraphProperty(cookie))) .toListExplicit(FlowPathFrame.class); if (flowPathFrames.size() > 1) { throw new PersistenceException(format("Found more that 1 FlowPath entity by (%s, %s)", flowId, cookie)); } return flowPathFrames.isEmpty() ? Optional.empty() : Optional.of(flowPathFrames.get(0)).map(FlowPath::new); } 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 shouldFindPathByFlowIdAndCookie() { FlowPath flowPath = createTestFlowPath(); Optional<FlowPath> foundPath = flowPathRepository.findByFlowIdAndCookie(TEST_FLOW_ID, flowPath.getCookie()); assertTrue(foundPath.isPresent()); }