MapUtilsTests.java

package com.objectpartners.buesing.util;

import org.junit.Assert;
import org.junit.Test;

import javax.naming.OperationNotSupportedException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Map;

import static com.objectpartners.buesing.util.MapUtils.entry;

/**
 * @author Neil Buesing
 */
public class MapUtilsTest {

    @Test
    public void testAsMap() {
        Map<String, Integer> map = MapUtils.asMap(entry("A", 1), entry("B", 2));
        Assert.assertEquals(2, map.size());
        Assert.assertEquals(Integer.valueOf(1), map.get("A"));
        Assert.assertEquals(Integer.valueOf(2), map.get("B"));
    }

    @Test
    public void testAsOrderedMap() {
        Map<String, Integer> map = MapUtils.asOrderedMap(
                entry("Z", 1), entry("Y", 9), entry("X", 2), entry("W", 7), entry("C", 3), entry("B", 6), entry("A", 4)
        );
        Assert.assertEquals(7, map.size());
        Assert.assertEquals(Arrays.asList("Z", "Y", "X", "W", "C", "B", "A"), new ArrayList<String>(map.keySet()));
        Assert.assertEquals(Arrays.asList(1, 9, 2, 7, 3, 6, 4), new ArrayList<Integer>(map.values()));
    }

    @Test
    public void testAsUnmodifiableMap() {
        Map<String, Integer> map = MapUtils.asUnmodifiableMap(entry("A", 1), entry("B", 2));
        Assert.assertEquals(2, map.size());
        Assert.assertEquals(Integer.valueOf(1), map.get("A"));
        Assert.assertEquals(Integer.valueOf(2), map.get("B"));

        try {
            map.put("AA", 33);
            Assert.fail("failed to throw exception");
        } catch (UnsupportedOperationException e) {
            // expected
        }
    }

    @Test
    public void testAsUnmodifiableOrderedMap() {
        Map<String, Integer> map = MapUtils.asUnmodifiableOrderedMap(
                entry("Z", 1), entry("Y", 9), entry("X", 2), entry("W", 7), entry("C", 3), entry("B", 6), entry("A", 4)
        );
        Assert.assertEquals(7, map.size());
        Assert.assertEquals(Arrays.asList("Z", "Y", "X", "W", "C", "B", "A"), new ArrayList<String>(map.keySet()));
        Assert.assertEquals(Arrays.asList(1, 9, 2, 7, 3, 6, 4), new ArrayList<Integer>(map.values()));

        try {
            map.put("AA", 33);
            Assert.fail("failed to throw exception");
        } catch (UnsupportedOperationException e) {
            // expected
        }
    }
}