KeyTest.java

/**
 * Copyright 2013 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.neba.core.util;

import org.junit.Test;

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

/**
 * @author Olaf Otto
 */
public class KeyTest {
	private Key key1;
	private Key key2;

	@Test
	public void testEqualKeys() throws Exception {
		withFirstKey("one", 2, "three");
		withSecondKey("one", 2, "three");
		assertKeysAreEqual();
	}
	
	@Test
	public void testUnequalKeys() throws Exception {
		withFirstKey("one", 2, 3);
		withSecondKey("one", 2, "three");
		assertKeysAreNotEqual();
	}

    @Test
    public void testNullValuesInKeysAreNotIgnored() throws Exception {
        withFirstKey("one", 2, null);
        withSecondKey("one", 2);
        assertKeysAreNotEqual();
    }

    @Test
    public void testHandlingOfNullKeys() throws Exception {
        withFirstKey((Object) null);
        withSecondKey((Object) null);
        assertKeysAreEqual();

        withFirstKey((Object[]) null);
        withSecondKey((Object[]) null);
        assertKeysAreEqual();
    }

    @Test
    public void testStringRepresentation() throws Exception {
        withFirstKey("one", 2, null);
        assertStringRepresentationIs("Key {one, 2, }");
    }

    private void assertStringRepresentationIs(String s) {
        assertThat(this.key1.toString()).isEqualTo(s);
    }

    private void assertKeysAreNotEqual() {
        assertThat(this.key1.hashCode()).isNotEqualTo(this.key2.hashCode());
		assertThat(this.key1).isNotEqualTo(key2);
		assertThat(this.key2).isNotEqualTo(key1);
	}

	private void assertKeysAreEqual() {
        assertThat(this.key1.hashCode()).isEqualTo(this.key2.hashCode());
		assertThat(this.key1).isEqualTo(key2);
		assertThat(this.key2).isEqualTo(key1);
	}
	
	private void withFirstKey(Object... contents) {
		this.key1 = new Key(contents);
	}

	private void withSecondKey(Object... contents) {
		this.key2 = new Key(contents);
	}
}