root/third_party/protobuf/java/src/test/java/com/google/protobuf/SmallSortedMapTest.java

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DEFINITIONS

This source file includes following definitions.
  1. getKey
  2. getValue
  3. setValue
  4. eq
  5. equals
  6. hashCode
  7. testPutAndGetArrayEntriesOnly
  8. testPutAndGetOverflowEntries
  9. runPutAndGetTest
  10. testReplacingPut
  11. testRemove
  12. testClear
  13. testGetArrayEntryAndOverflowEntries
  14. testEntrySetContains
  15. testEntrySetAdd
  16. testEntrySetRemove
  17. testEntrySetClear
  18. testEntrySetIteratorNext
  19. testEntrySetIteratorRemove
  20. testMapEntryModification
  21. testMakeImmutable
  22. makeSortedKeySet

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://code.google.com/p/protobuf/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

package com.google.protobuf;

import junit.framework.TestCase;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;

/**
 * @author darick@google.com Darick Tong
 */
public class SmallSortedMapTest extends TestCase {
  // java.util.AbstractMap.SimpleEntry is private in JDK 1.5. We re-implement it
  // here for JDK 1.5 users.
  private static class SimpleEntry<K, V> implements Map.Entry<K, V> {
    private final K key;
    private V value;

    SimpleEntry(K key, V value) {
      this.key = key;
      this.value = value;
    }

    public K getKey() {
      return key;
    }

    public V getValue() {
      return value;
    }

    public V setValue(V value) {
      V oldValue = this.value;
      this.value = value;
      return oldValue;
    }

    private static boolean eq(Object o1, Object o2) {
      return o1 == null ? o2 == null : o1.equals(o2);
    }

    @Override
    public boolean equals(Object o) {
      if (!(o instanceof Map.Entry))
        return false;
      Map.Entry e = (Map.Entry) o;
      return eq(key, e.getKey()) && eq(value, e.getValue());
    }

    @Override
    public int hashCode() {
      return ((key == null) ? 0 : key.hashCode()) ^
          ((value == null) ? 0 : value.hashCode());
    }
  }

  public void testPutAndGetArrayEntriesOnly() {
    runPutAndGetTest(3);
  }

  public void testPutAndGetOverflowEntries() {
    runPutAndGetTest(6);
  }

  private void runPutAndGetTest(int numElements) {
    // Test with even and odd arraySize
    SmallSortedMap<Integer, Integer> map1 =
        SmallSortedMap.newInstanceForTest(3);
    SmallSortedMap<Integer, Integer> map2 =
        SmallSortedMap.newInstanceForTest(4);
    SmallSortedMap<Integer, Integer> map3 =
        SmallSortedMap.newInstanceForTest(3);
    SmallSortedMap<Integer, Integer> map4 =
        SmallSortedMap.newInstanceForTest(4);

    // Test with puts in ascending order.
    for (int i = 0; i < numElements; i++) {
      assertNull(map1.put(i, i + 1));
      assertNull(map2.put(i, i + 1));
    }
    // Test with puts in descending order.
    for (int i = numElements - 1; i >= 0; i--) {
      assertNull(map3.put(i, i + 1));
      assertNull(map4.put(i, i + 1));
    }

    assertEquals(Math.min(3, numElements), map1.getNumArrayEntries());
    assertEquals(Math.min(4, numElements), map2.getNumArrayEntries());
    assertEquals(Math.min(3, numElements), map3.getNumArrayEntries());
    assertEquals(Math.min(4, numElements), map4.getNumArrayEntries());

    List<SmallSortedMap<Integer, Integer>> allMaps =
        new ArrayList<SmallSortedMap<Integer, Integer>>();
    allMaps.add(map1);
    allMaps.add(map2);
    allMaps.add(map3);
    allMaps.add(map4);

    for (SmallSortedMap<Integer, Integer> map : allMaps) {
      assertEquals(numElements, map.size());
      for (int i = 0; i < numElements; i++) {
        assertEquals(new Integer(i + 1), map.get(i));
      }
    }

    assertEquals(map1, map2);
    assertEquals(map2, map3);
    assertEquals(map3, map4);
  }

  public void testReplacingPut() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    for (int i = 0; i < 6; i++) {
      assertNull(map.put(i, i + 1));
      assertNull(map.remove(i + 1));
    }
    for (int i = 0; i < 6; i++) {
      assertEquals(new Integer(i + 1), map.put(i, i + 2));
    }
  }

  public void testRemove() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    for (int i = 0; i < 6; i++) {
      assertNull(map.put(i, i + 1));
      assertNull(map.remove(i + 1));
    }

    assertEquals(3, map.getNumArrayEntries());
    assertEquals(3, map.getNumOverflowEntries());
    assertEquals(6,  map.size());
    assertEquals(makeSortedKeySet(0, 1, 2, 3, 4, 5), map.keySet());

    assertEquals(new Integer(2), map.remove(1));
    assertEquals(3, map.getNumArrayEntries());
    assertEquals(2, map.getNumOverflowEntries());
    assertEquals(5,  map.size());
    assertEquals(makeSortedKeySet(0, 2, 3, 4, 5), map.keySet());

    assertEquals(new Integer(5), map.remove(4));
    assertEquals(3, map.getNumArrayEntries());
    assertEquals(1, map.getNumOverflowEntries());
    assertEquals(4,  map.size());
    assertEquals(makeSortedKeySet(0, 2, 3, 5), map.keySet());

    assertEquals(new Integer(4), map.remove(3));
    assertEquals(3, map.getNumArrayEntries());
    assertEquals(0, map.getNumOverflowEntries());
    assertEquals(3, map.size());
    assertEquals(makeSortedKeySet(0, 2, 5), map.keySet());

    assertNull(map.remove(3));
    assertEquals(3, map.getNumArrayEntries());
    assertEquals(0, map.getNumOverflowEntries());
    assertEquals(3, map.size());

    assertEquals(new Integer(1), map.remove(0));
    assertEquals(2, map.getNumArrayEntries());
    assertEquals(0, map.getNumOverflowEntries());
    assertEquals(2, map.size());
  }

  public void testClear() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    for (int i = 0; i < 6; i++) {
      assertNull(map.put(i, i + 1));
    }
    map.clear();
    assertEquals(0, map.getNumArrayEntries());
    assertEquals(0, map.getNumOverflowEntries());
    assertEquals(0, map.size());
  }

  public void testGetArrayEntryAndOverflowEntries() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    for (int i = 0; i < 6; i++) {
      assertNull(map.put(i, i + 1));
    }
    assertEquals(3, map.getNumArrayEntries());
    for (int i = 0; i < 3; i++) {
      Map.Entry<Integer, Integer> entry = map.getArrayEntryAt(i);
      assertEquals(new Integer(i), entry.getKey());
      assertEquals(new Integer(i + 1), entry.getValue());
    }
    Iterator<Map.Entry<Integer, Integer>> it =
        map.getOverflowEntries().iterator();
    for (int i = 3; i < 6; i++) {
      assertTrue(it.hasNext());
      Map.Entry<Integer, Integer> entry = it.next();
      assertEquals(new Integer(i), entry.getKey());
      assertEquals(new Integer(i + 1), entry.getValue());
    }
    assertFalse(it.hasNext());
  }

  public void testEntrySetContains() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    for (int i = 0; i < 6; i++) {
      assertNull(map.put(i, i + 1));
    }
    Set<Map.Entry<Integer, Integer>> entrySet = map.entrySet();
    for (int i = 0; i < 6; i++) {
      assertTrue(
          entrySet.contains(new SimpleEntry<Integer, Integer>(i, i + 1)));
      assertFalse(
          entrySet.contains(new SimpleEntry<Integer, Integer>(i, i)));
    }
  }

  public void testEntrySetAdd() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    Set<Map.Entry<Integer, Integer>> entrySet = map.entrySet();
    for (int i = 0; i < 6; i++) {
      Map.Entry<Integer, Integer> entry =
          new SimpleEntry<Integer, Integer>(i, i + 1);
      assertTrue(entrySet.add(entry));
      assertFalse(entrySet.add(entry));
    }
    for (int i = 0; i < 6; i++) {
      assertEquals(new Integer(i + 1), map.get(i));
    }
    assertEquals(3, map.getNumArrayEntries());
    assertEquals(3, map.getNumOverflowEntries());
    assertEquals(6, map.size());
  }

  public void testEntrySetRemove() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    Set<Map.Entry<Integer, Integer>> entrySet = map.entrySet();
    for (int i = 0; i < 6; i++) {
      assertNull(map.put(i, i + 1));
    }
    for (int i = 0; i < 6; i++) {
      Map.Entry<Integer, Integer> entry =
          new SimpleEntry<Integer, Integer>(i, i + 1);
      assertTrue(entrySet.remove(entry));
      assertFalse(entrySet.remove(entry));
    }
    assertTrue(map.isEmpty());
    assertEquals(0, map.getNumArrayEntries());
    assertEquals(0, map.getNumOverflowEntries());
    assertEquals(0, map.size());
  }

  public void testEntrySetClear() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    for (int i = 0; i < 6; i++) {
      assertNull(map.put(i, i + 1));
    }
    map.entrySet().clear();
    assertTrue(map.isEmpty());
    assertEquals(0, map.getNumArrayEntries());
    assertEquals(0, map.getNumOverflowEntries());
    assertEquals(0, map.size());
  }

  public void testEntrySetIteratorNext() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    for (int i = 0; i < 6; i++) {
      assertNull(map.put(i, i + 1));
    }
    Iterator<Map.Entry<Integer, Integer>> it = map.entrySet().iterator();
    for (int i = 0; i < 6; i++) {
      assertTrue(it.hasNext());
      Map.Entry<Integer, Integer> entry = it.next();
      assertEquals(new Integer(i), entry.getKey());
      assertEquals(new Integer(i + 1), entry.getValue());
    }
    assertFalse(it.hasNext());
  }

  public void testEntrySetIteratorRemove() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    for (int i = 0; i < 6; i++) {
      assertNull(map.put(i, i + 1));
    }
    Iterator<Map.Entry<Integer, Integer>> it = map.entrySet().iterator();
    for (int i = 0; i < 6; i++) {
      assertTrue(map.containsKey(i));
      it.next();
      it.remove();
      assertFalse(map.containsKey(i));
      assertEquals(6 - i - 1, map.size());
    }
  }

  public void testMapEntryModification() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    for (int i = 0; i < 6; i++) {
      assertNull(map.put(i, i + 1));
    }
    Iterator<Map.Entry<Integer, Integer>> it = map.entrySet().iterator();
    for (int i = 0; i < 6; i++) {
      Map.Entry<Integer, Integer> entry = it.next();
      entry.setValue(i + 23);
    }
    for (int i = 0; i < 6; i++) {
      assertEquals(new Integer(i + 23), map.get(i));
    }
  }

  public void testMakeImmutable() {
    SmallSortedMap<Integer, Integer> map = SmallSortedMap.newInstanceForTest(3);
    for (int i = 0; i < 6; i++) {
      assertNull(map.put(i, i + 1));
    }
    map.makeImmutable();
    assertEquals(new Integer(1), map.get(0));
    assertEquals(6, map.size());

    try {
      map.put(23, 23);
      fail("Expected UnsupportedOperationException");
    } catch (UnsupportedOperationException expected) {
    }

    Map<Integer, Integer> other = new HashMap<Integer, Integer>();
    other.put(23, 23);
    try {
      map.putAll(other);
      fail("Expected UnsupportedOperationException");
    } catch (UnsupportedOperationException expected) {
    }

    try {
      map.remove(0);
      fail("Expected UnsupportedOperationException");
    } catch (UnsupportedOperationException expected) {
    }

    try {
      map.clear();
      fail("Expected UnsupportedOperationException");
    } catch (UnsupportedOperationException expected) {
    }

    Set<Map.Entry<Integer, Integer>> entrySet = map.entrySet();
    try {
      entrySet.clear();
      fail("Expected UnsupportedOperationException");
    } catch (UnsupportedOperationException expected) {
    }

    Iterator<Map.Entry<Integer, Integer>> it = entrySet.iterator();
    while (it.hasNext()) {
      Map.Entry<Integer, Integer> entry = it.next();
      try {
        entry.setValue(0);
        fail("Expected UnsupportedOperationException");
      } catch (UnsupportedOperationException expected) {
      }
      try {
        it.remove();
        fail("Expected UnsupportedOperationException");
      } catch (UnsupportedOperationException expected) {
      }
    }

    Set<Integer> keySet = map.keySet();
    try {
      keySet.clear();
      fail("Expected UnsupportedOperationException");
    } catch (UnsupportedOperationException expected) {
    }

    Iterator<Integer> keys = keySet.iterator();
    while (keys.hasNext()) {
      Integer key = keys.next();
      try {
        keySet.remove(key);
        fail("Expected UnsupportedOperationException");
      } catch (UnsupportedOperationException expected) {
      }
      try {
        keys.remove();
        fail("Expected UnsupportedOperationException");
      } catch (UnsupportedOperationException expected) {
      }
    }
  }

  private Set<Integer> makeSortedKeySet(Integer... keys) {
    return new TreeSet<Integer>(Arrays.<Integer>asList(keys));
  }
}

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