EvaluableOffsetListTest.java

// Copyright 2009 Google Inc.  All Rights Reserved.

package org.waveprotocol.wave.model.util;


import junit.framework.TestCase;

import org.waveprotocol.wave.model.util.OffsetList.Container;
import org.waveprotocol.wave.model.util.OffsetList.LocationAction;

/**
 * Tests for EvaluableOffsetList.
 *
*
 */
public class EvaluableOffsetListTest extends TestCase {

  public void testPerformActionAtEnd() {
    final OffsetList<Integer> offsetList = new EvaluableOffsetList<Integer, Void>();
    for (int i = 1; i <= 10; ++i) {
      offsetList.sentinel().insertBefore(i, i);
    }
    offsetList.performActionAt(55, new LocationAction<Integer, Void>() {
      @Override
      public Void performAction(Container<Integer> container, int offset) {
        assertTrue(container == offsetList.sentinel());
        assertNull(container.getValue());
        assertEquals(0, offset);
        return null;
      }
    });
  }

  public void testPerformAction() {
    performTest(0, 1, 0);
    performTest(1, 2, 0);
    performTest(2, 2, 1);
    performTest(3, 3, 0);
    performTest(4, 3, 1);
    performTest(10, 5, 0);
    performTest(14, 5, 4);
    performTest(15, 6, 0);
    performTest(54, 10, 9);
  }

  private void performTest(int location, final Integer expectedValue, final int expectedOffset) {
    OffsetList<Integer> offsetList = new EvaluableOffsetList<Integer, Void>();
    for (int i = 1; i <= 10; ++i) {
      offsetList.sentinel().insertBefore(i, i);
    }
    offsetList.performActionAt(location, new LocationAction<Integer, Void>() {
      @Override
      public Void performAction(Container<Integer> container, int offset) {
        assertEquals(expectedValue, container.getValue());
        assertEquals(expectedOffset, offset);
        return null;
      }
    });
  }

}