CellTest.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;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotSame;
import static org.opencastproject.util.data.VCell.cell;

import org.junit.Test;

public class CellTest {
  @Test
  public void testVCell() {
    final VCell<String> c = cell("hello");
    assertEquals("hello", c.get());
    final Object change1 = c.change().getB();
    c.set("hello");
    assertEquals(change1, c.change().getB());
    c.set("goodbye");
    assertNotSame(change1, c.change().getB());
  }

  @Test
  public void testVCell2() {
    final VCell<String> c = cell("hello");
    final Object change1 = c.change().getB();
    c.set("hello");
    assertEquals(change1, c.change().getB());
    c.set("goodbye");
    assertNotSame(change1, c.change().getB());
  }

  @Test
  public void testFCell() {
    final VCell<String> c = cell("hello");
    final Cell<Integer> f = c.lift(new Function<String, Integer>() {
      @Override public Integer apply(String s) {
        return s.length();
      }
    });
    assertEquals(5, (int) f.get());
    final Object change1 = f.change().getB();
    c.set("hello");
    assertEquals(change1, f.change().getB());
    c.set("goodbye");
    assertNotSame(change1, f.change().getB());
    assertEquals(7, (int) f.get());
  }
}