io.github.carlomicieli.footballdb.starter.utils.MapUtilsTests.java Source code

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Here is the source code for io.github.carlomicieli.footballdb.starter.utils.MapUtilsTests.java

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/*
 * Copyright 2014 the original author or authors.
 *
 *  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 io.github.carlomicieli.footballdb.starter.utils;

import org.apache.commons.lang3.tuple.ImmutablePair;
import org.junit.Test;

import java.util.Map;
import java.util.stream.Stream;

import static org.assertj.core.api.Assertions.*;

public class MapUtilsTests {

    @Test
    public void shouldCreateNewPairs() {
        ImmutablePair<Integer, String> pair = MapUtils.pair(1, "one");
        assertThat(pair).isNotNull();
        assertThat(pair.getLeft()).isEqualTo(1);
        assertThat(pair.getRight()).isEqualTo("one");
    }

    @Test
    public void shouldCreateNewMapsFromStreamOfPairs() {
        Map<Integer, String> map = MapUtils
                .newMap(Stream.of(MapUtils.pair(1, "one"), MapUtils.pair(2, "two"), MapUtils.pair(3, "three")));

        assertThat(map).isNotNull();
        assertThat(map).hasSize(3);
    }

    @Test(expected = UnsupportedOperationException.class)
    public void shouldCreateImmutableMaps() {
        Map<Integer, Integer> map = MapUtils.newMap(Stream.of(MapUtils.pair(1, 2)));

        map.put(2, 3);
    }

    @Test
    public void shouldCreateSingletonMaps() {
        Map<Integer, Integer> map = MapUtils.asMap(1, 2);
        assertThat(map).isNotNull();
        assertThat(map).containsEntry(1, 2);
    }
}