FlowManagerTest.java

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/* Copyright 2018 Telstra Open Source
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

package org.openkilda.atdd.staging.service;

import static java.util.Collections.singletonList;
import static org.hamcrest.CoreMatchers.hasItems;
import static org.hamcrest.Matchers.allOf;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.hasItem;
import static org.hamcrest.Matchers.hasProperty;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.when;

import org.openkilda.atdd.staging.service.flowmanager.FlowManagerImpl;
import org.openkilda.messaging.info.event.PathInfoData;
import org.openkilda.messaging.model.SwitchId;
import org.openkilda.messaging.payload.flow.FlowPayload;
import org.openkilda.testing.model.topology.TopologyDefinition;
import org.openkilda.testing.service.northbound.NorthboundService;
import org.openkilda.testing.service.topology.TopologyEngineService;

import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import java.io.IOException;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

public class FlowManagerTest {

    @Mock
    private NorthboundService northboundService;

    @Mock
    private TopologyEngineService topologyEngineService;

    @Mock
    private TopologyDefinition topologyDefinition;

    @InjectMocks
    private FlowManagerImpl flowManager;

    @Rule
    public ExpectedException expectedException = ExpectedException.none();

    @Before
    public void setUp() throws IOException {
        MockitoAnnotations.initMocks(this);

        ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
        mapper.enable(MapperFeature.ACCEPT_CASE_INSENSITIVE_ENUMS);
        TopologyDefinition topology = mapper.readValue(
                getClass().getResourceAsStream("/5-switch-test-topology.yaml"), TopologyDefinition.class);

        when(topologyDefinition.getActiveSwitches()).thenReturn(topology.getActiveSwitches());
        when(topologyDefinition.getTraffGens()).thenReturn(topology.getTraffGens());
    }

    @Test
    public void shouldDefineFlowsOver2Switches() {
        // given
        when(topologyEngineService.getPaths(
                eq(new SwitchId(1L)),
                eq(new SwitchId(2L))))
                .thenReturn(singletonList(new PathInfoData()));
        when(topologyEngineService.getPaths(
                eq(new SwitchId(2L)),
                eq(new SwitchId(1L))))
                .thenReturn(singletonList(new PathInfoData()));

        // when
        final Set<FlowPayload> flows = flowManager.allActiveSwitchesFlows();

        // then
        assertEquals(1, flows.size());
        assertThat(flows, hasItem(allOf(
                hasProperty("source", allOf(
                        hasProperty("switchDpId", equalTo(new SwitchId(1L))),
                        hasProperty("portId", equalTo(10)),
                        hasProperty("vlanId", equalTo(1)))),
                hasProperty("destination", allOf(
                        hasProperty("switchDpId", equalTo(new SwitchId(2L))),
                        hasProperty("portId", equalTo(10)),
                        hasProperty("vlanId", equalTo(1))))
        )));
    }

    @Test
    public void shouldDefineFlowsOver3Switches() {
        // given
        when(topologyEngineService.getPaths(
                eq(new SwitchId(1L)),
                eq(new SwitchId(2L))))
                .thenReturn(singletonList(new PathInfoData()));
        when(topologyEngineService.getPaths(
                eq(new SwitchId(2L)),
                eq(new SwitchId(1L))))
                .thenReturn(singletonList(new PathInfoData()));
        when(topologyEngineService.getPaths(
                eq(new SwitchId(2L)),
                eq(new SwitchId(3L))))
                .thenReturn(singletonList(new PathInfoData()));
        when(topologyEngineService.getPaths(
                eq(new SwitchId(3L)),
                eq(new SwitchId(2L))))
                .thenReturn(singletonList(new PathInfoData()));

        // when
        final Set<FlowPayload> flows = flowManager.allActiveSwitchesFlows();

        // then
        assertEquals(2, flows.size());

        assertThat(flows, hasItems(
                allOf(
                        hasProperty("source", allOf(
                                hasProperty("switchDpId", equalTo(new SwitchId(1L))),
                                hasProperty("portId", equalTo(10)),
                                hasProperty("vlanId", equalTo(1)))),
                        hasProperty("destination", allOf(
                                hasProperty("switchDpId", equalTo(new SwitchId(2L))),
                                hasProperty("portId", equalTo(10)),
                                hasProperty("vlanId", equalTo(1))))
                ),
                allOf(
                        hasProperty("source", allOf(
                                hasProperty("switchDpId", equalTo(new SwitchId(2L))),
                                hasProperty("portId", equalTo(10)),
                                hasProperty("vlanId", equalTo(2)))),
                        hasProperty("destination", allOf(
                                hasProperty("switchDpId", equalTo(new SwitchId(3L))),
                                hasProperty("portId", equalTo(10)),
                                hasProperty("vlanId", equalTo(2))))
                )
        ));
    }

    @Test
    public void shouldSkipFlowsOverTheSameSwitches() {
        // given
        when(topologyEngineService.getPaths(
                eq(new SwitchId(1L)),
                eq(new SwitchId(1L))))
                .thenReturn(singletonList(new PathInfoData()));

        // when
        final Set<FlowPayload> flows = flowManager.allActiveSwitchesFlows();

        // then
        assertEquals(0, flows.size());
    }

    @Test
    public void shouldDefineFlowCrossVlan() {
        // given
        when(topologyEngineService.getPaths(
                eq(new SwitchId(1L)),
                eq(new SwitchId(4L))))
                .thenReturn(singletonList(new PathInfoData()));
        when(topologyEngineService.getPaths(
                eq(new SwitchId(4L)),
                eq(new SwitchId(1L))))
                .thenReturn(singletonList(new PathInfoData()));

        // when
        final Set<FlowPayload> flows = flowManager.allActiveSwitchesFlows();

        // then
        assertEquals(1, flows.size());

        assertThat(flows, hasItem(allOf(
                hasProperty("source", allOf(
                        hasProperty("portId", equalTo(10)),
                        hasProperty("vlanId", equalTo(1)))),
                hasProperty("destination", allOf(
                        hasProperty("portId", equalTo(10)),
                        hasProperty("vlanId", equalTo(50))))
        )));
    }

    @Test
    public void failIfNoVlanAvailable() {
        // given
        when(topologyEngineService.getPaths(
                eq(new SwitchId(4L)),
                eq(new SwitchId(2L))))
                .thenReturn(singletonList(new PathInfoData()));
        when(topologyEngineService.getPaths(
                eq(new SwitchId(4L)),
                eq(new SwitchId(1L))))
                .thenReturn(singletonList(new PathInfoData()));
        when(topologyEngineService.getPaths(
                eq(new SwitchId(2L)),
                eq(new SwitchId(4L))))
                .thenReturn(singletonList(new PathInfoData()));
        when(topologyEngineService.getPaths(
                eq(new SwitchId(1L)),
                eq(new SwitchId(4L))))
                .thenReturn(singletonList(new PathInfoData()));

        expectedException.expect(IllegalStateException.class);

        // when
        flowManager.allActiveSwitchesFlows();

        // then
        fail();
    }

    @Test
    public void shouldDefineFlowsOver2TraffGens() {
        // given
        final List<TopologyDefinition.TraffGen> activeTraffGens = topologyDefinition.getTraffGens().stream()
                .filter(traffGen -> {
                    SwitchId dpId = traffGen.getSwitchConnected().getDpId();
                    return dpId.equals(new SwitchId(1L))
                            || dpId.equals(new SwitchId(2L));
                })
                .collect(Collectors.toList());
        when(topologyDefinition.getActiveTraffGens()).thenReturn(activeTraffGens);

        // when
        final Set<FlowPayload> flows = flowManager.allActiveTraffgenFlows();

        // then
        assertEquals(1, flows.size());
        assertThat(flows, hasItem(allOf(
                hasProperty("source", allOf(
                        hasProperty("switchDpId", equalTo(new SwitchId(1L))),
                        hasProperty("portId", equalTo(10)),
                        hasProperty("vlanId", equalTo(1)))),
                hasProperty("destination", allOf(
                        hasProperty("switchDpId", equalTo(new SwitchId(2L))),
                        hasProperty("portId", equalTo(10)),
                        hasProperty("vlanId", equalTo(1))))
        )));
    }

    @Test
    public void shouldDefineFlowsOver3TraffGens() {
        // given
        final List<TopologyDefinition.TraffGen> activeTraffGens = topologyDefinition.getTraffGens();
        when(topologyDefinition.getActiveTraffGens()).thenReturn(activeTraffGens);

        // when
        final Set<FlowPayload> flows = flowManager.allActiveTraffgenFlows();

        // then
        assertEquals(3, flows.size());
        assertThat(flows, hasItems(
                allOf(
                        hasProperty("source",
                                hasProperty("switchDpId", equalTo(new SwitchId(1L)))),
                        hasProperty("destination",
                                hasProperty("switchDpId", equalTo(new SwitchId(2L))))
                ),
                allOf(
                        hasProperty("source",
                                hasProperty("switchDpId", equalTo(new SwitchId(1L)))),
                        hasProperty("destination",
                                hasProperty("switchDpId", equalTo(new SwitchId(3L))))
                ),
                allOf(
                        hasProperty("source",
                                hasProperty("switchDpId", equalTo(new SwitchId(2L)))),
                        hasProperty("destination",
                                hasProperty("switchDpId", equalTo(new SwitchId(3L))))
                )
        ));
    }
}