/*
 * Copyright 2016-present Open Networking Laboratory
 *
 * 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.onlab.util;

import static junit.framework.TestCase.assertEquals;
import static junit.framework.TestCase.assertFalse;
import static junit.framework.TestCase.assertTrue;

import org.junit.Test;

import com.google.common.base.Objects;

/**
 * Unit tests for Match.
 */
public class MatchTest {

    @Test
    public void testMatches() {
        Match<String> m1 = Match.any();
        assertTrue(m1.matches(null));
        assertTrue(m1.matches("foo"));
        assertTrue(m1.matches("bar"));

        Match<String> m2 = Match.ifNull();
        assertTrue(m2.matches(null));
        assertFalse(m2.matches("foo"));

        Match<String> m3 = Match.ifValue("foo");
        assertFalse(m3.matches(null));
        assertFalse(m3.matches("bar"));
        assertTrue(m3.matches("foo"));

        Match<byte[]> m4 = Match.ifValue(new byte[8]);
        assertTrue(m4.matches(new byte[8]));
        assertFalse(m4.matches(new byte[7]));
    }

    @Test
    public void testEquals() {
        Match<String> m1 = Match.any();
        Match<String> m2 = Match.any();
        Match<String> m3 = Match.ifNull();
        Match<String> m4 = Match.ifValue("bar");
        assertEquals(m1, m2);
        assertFalse(Objects.equal(m1, m3));
        assertFalse(Objects.equal(m3, m4));
        Object o = new Object();
        assertFalse(Objects.equal(m1, o));
    }

    @Test
    public void testMap() {
        Match<String> m1 = Match.ifNull();
        assertEquals(m1.map(s -> "bar"), Match.ifNull());
        Match<String> m2 = Match.ifValue("foo");
        Match<String> m3 = m2.map(s -> "bar");
        assertTrue(m3.matches("bar"));
    }

    @Test
    public void testIfNotNull() {
       Match<String> m = Match.ifNotNull();
       assertFalse(m.matches(null));
       assertTrue(m.matches("foo"));
    }

    @Test
    public void testIfNotValue() {
        Match<String> m1 = Match.ifNotValue(null);
        Match<String> m2 = Match.ifNotValue("foo");
        assertFalse(m1.matches(null));
        assertFalse(m2.matches("foo"));
    }

    @Test
    public void testToString() {
        Match<String> m1 = Match.any();
        Match<String> m2 = Match.any();
        Match<String> m3 = Match.ifValue("foo");
        Match<String> m4 = Match.ifValue("foo");
        Match<String> m5 = Match.ifNotValue("foo");

        String note = "Results of toString() should be consistent -- ";

        assertTrue(note, m1.toString().equals(m2.toString()));
        assertTrue(note, m3.toString().equals(m4.toString()));
        assertFalse(note, m4.toString().equals(m5.toString()));
    }

    @Test
    public void testHashCode() {
        Match<String> m1 = Match.ifValue("foo");
        Match<String> m2 = Match.ifNotValue("foo");
        Match<String> m3 = Match.ifValue("foo");
        Match<String> m4 = Match.ifNotNull();
        Match<String> m5 = Match.ifNull();

        assertTrue(m1.hashCode() == m3.hashCode());
        assertFalse(m2.hashCode() == m1.hashCode());
        assertFalse(m4.hashCode() == m5.hashCode());

    }

}