EithersTest.java

/**
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 *
 * The Apereo Foundation licenses this file to you under the Educational
 * Community 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://opensource.org/licenses/ecl2.txt
 *
 * 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.opencastproject.util.data.functions;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.opencastproject.util.data.Either.left;
import static org.opencastproject.util.data.Either.right;
import static org.opencastproject.util.data.functions.Eithers.flatten;

import org.opencastproject.util.data.Either;

import org.junit.Test;

public class EithersTest {
  @Test
  public void testFlatten() throws Exception {
    {
      Either<String, Either<String, Integer>> e = left("error");
      assertEquals("error", e.left().value());
    }
    {
      Either<String, Either<String, Integer>> e = right(Either.<String, Integer>left("error"));
      assertTrue(flatten(e).isLeft());
      assertEquals("error", flatten(e).left().value());
    }
    {
      Either<String, Either<String, Integer>> e = right(Either.<String, Integer>right(1));
      assertTrue(flatten(e).isRight());
      assertEquals(new Integer(1), flatten(e).right().value());
    }
  }
}