package org.onlab.onos.net.intent;

import org.junit.Test;
import org.onlab.onos.net.HostId;
import org.onlab.onos.net.flow.TrafficSelector;
import org.onlab.onos.net.flow.TrafficTreatment;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.not;
import static org.onlab.onos.net.NetTestTools.hid;

/**
 * Unit tests for the HostToHostIntent class.
 */
public class TestHostToHostIntent {

    private TrafficSelector selector = new IntentTestsMocks.MockSelector();
    private TrafficTreatment treatment = new IntentTestsMocks.MockTreatment();

    private HostToHostIntent makeHostToHost(long id, HostId one, HostId two) {
        return new HostToHostIntent(new IntentId(id),
                                    one,
                                    two,
                                    selector,
                                    treatment);
    }

    /**
     * Tests the equals() method where two HostToHostIntents have references
     * to the same hosts. These should compare equal.
     */
    @Test
    public void testSameEquals() {

        HostId one = hid("00:00:00:00:00:01/-1");
        HostId two = hid("00:00:00:00:00:02/-1");
        HostToHostIntent i1 = makeHostToHost(12, one, two);
        HostToHostIntent i2 = makeHostToHost(12, one, two);

        assertThat(i1, is(equalTo(i2)));
    }

    /**
     * Tests the equals() method where two HostToHostIntents have references
     * to different Hosts. These should compare not equal.
     */
    @Test
    public void testLinksDifferentEquals() {

        HostId one = hid("00:00:00:00:00:01/-1");
        HostId two = hid("00:00:00:00:00:02/-1");
        HostToHostIntent i1 = makeHostToHost(12, one, two);
        HostToHostIntent i2 = makeHostToHost(12, two, one);

        assertThat(i1, is(not(equalTo(i2))));
    }

    /**
     * Tests the equals() method where two HostToHostIntents have different
     * ids. These should compare not equal.
     */

    @Test
    public void testBaseDifferentEquals() {
        HostId one = hid("00:00:00:00:00:01/-1");
        HostId two = hid("00:00:00:00:00:02/-1");
        HostToHostIntent i1 = makeHostToHost(12, one, two);
        HostToHostIntent i2 = makeHostToHost(11, one, two);

        assertThat(i1, is(not(equalTo(i2))));
    }

    /**
     * Tests that the hashCode() values for two equivalent HostToHostIntent
     * objects are the same.
     */

    @Test
    public void testHashCodeEquals() {
        HostId one = hid("00:00:00:00:00:01/-1");
        HostId two = hid("00:00:00:00:00:02/-1");
        HostToHostIntent i1 = makeHostToHost(12, one, two);
        HostToHostIntent i2 = makeHostToHost(12, one, two);

        assertThat(i1.hashCode(), is(equalTo(i2.hashCode())));
    }

    /**
     * Tests that the hashCode() values for two distinct LinkCollectionIntent
     * objects are different.
     */

    @Test
    public void testHashCodeDifferent() {
        HostId one = hid("00:00:00:00:00:01/-1");
        HostId two = hid("00:00:00:00:00:02/-1");
        HostToHostIntent i1 = makeHostToHost(12, one, two);
        HostToHostIntent i2 = makeHostToHost(112, one, two);

        assertThat(i1.hashCode(), is(not(equalTo(i2.hashCode()))));
    }

    /**
     * Checks that the HostToHostIntent class is immutable.
     */
    @Test
    public void checkImmutability() {
        ImmutableClassChecker.assertThatClassIsImmutable(HostToHostIntent.class);
    }
}