MapEntry_equals_hashCode_Test.java

/*
 * Created on Dec 21, 2010
 *
 * 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.
 *
 * Copyright @2010-2013 the original author or authors.
 */
package org.fest.assertions.data;

import static junit.framework.Assert.assertFalse;

import static org.fest.assertions.data.MapEntry.entry;
import static org.fest.test.EqualsHashCodeContractAssert.assertEqualsIsReflexive;
import static org.fest.test.EqualsHashCodeContractAssert.assertEqualsIsSymmetric;
import static org.fest.test.EqualsHashCodeContractAssert.assertEqualsIsTransitive;
import static org.fest.test.EqualsHashCodeContractAssert.assertMaintainsEqualsAndHashCodeContract;

import org.junit.BeforeClass;
import org.junit.Test;

/**
 * Tests for {@link MapEntry#equals(Object)} and {@link MapEntry#hashCode()}.
 *
 * @author Alex Ruiz
 * @author Yvonne Wang
 */
public class MapEntry_equals_hashCode_Test {
  private static MapEntry entry;

  @BeforeClass
  public static void setUpOnce() {
    entry = entry("key", "value");
  }

  @Test
  public void should_have_reflexive_equals() {
    assertEqualsIsReflexive(entry);
  }

  @Test
  public void should_have_symmetric_equals() {
    assertEqualsIsSymmetric(entry, entry("key", "value"));
  }

  @Test
  public void should_have_transitive_equals() {
    assertEqualsIsTransitive(entry, entry("key", "value"), entry("key", "value"));
  }

  @Test
  public void should_maintain_equals_and_hashCode_contract() {
    assertMaintainsEqualsAndHashCodeContract(entry, entry("key", "value"));
  }

  @Test
  public void should_not_be_equal_to_Object_of_different_type() {
    assertFalse(entry.equals("{'key', 'value'}"));
  }

  @Test
  public void should_not_be_equal_to_null() {
    assertFalse(entry.equals(null));
  }

  @Test
  public void should_not_be_equal_to_MapEntry_with_different_value() {
    assertFalse(entry.equals(entry("key0", "value0")));
  }
}