// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// 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.
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// contributors may be used to endorse or promote products derived from
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//
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package com.google.protobuf;

import static java.util.Arrays.asList;

import com.google.protobuf.Internal.BooleanList;
import java.util.Collections;
import java.util.ConcurrentModificationException;
import java.util.Iterator;
import junit.framework.TestCase;

/**
 * Tests for {@link BooleanArrayList}.
 *
 * @author dweis@google.com (Daniel Weis)
 */
public class BooleanArrayListTest extends TestCase {

  private static final BooleanArrayList UNARY_LIST = newImmutableBooleanArrayList(true);
  private static final BooleanArrayList TERTIARY_LIST =
      newImmutableBooleanArrayList(true, false, true);

  private BooleanArrayList list;

  @Override
  protected void setUp() throws Exception {
    list = new BooleanArrayList();
  }

  public void testEmptyListReturnsSameInstance() {
    assertSame(BooleanArrayList.emptyList(), BooleanArrayList.emptyList());
  }

  public void testEmptyListIsImmutable() {
    assertImmutable(BooleanArrayList.emptyList());
  }

  public void testMakeImmutable() {
    list.addBoolean(true);
    list.addBoolean(false);
    list.addBoolean(true);
    list.addBoolean(true);
    list.makeImmutable();
    assertImmutable(list);
  }

  public void testModificationWithIteration() {
    list.addAll(asList(true, false, true, false));
    Iterator<Boolean> iterator = list.iterator();
    assertEquals(4, list.size());
    assertEquals(true, (boolean) list.get(0));
    assertEquals(true, (boolean) iterator.next());
    list.set(0, true);
    assertEquals(false, (boolean) iterator.next());

    list.remove(0);
    try {
      iterator.next();
      fail();
    } catch (ConcurrentModificationException e) {
      // expected
    }

    iterator = list.iterator();
    list.add(0, false);
    try {
      iterator.next();
      fail();
    } catch (ConcurrentModificationException e) {
      // expected
    }
  }

  public void testGet() {
    assertEquals(true, (boolean) TERTIARY_LIST.get(0));
    assertEquals(false, (boolean) TERTIARY_LIST.get(1));
    assertEquals(true, (boolean) TERTIARY_LIST.get(2));

    try {
      TERTIARY_LIST.get(-1);
      fail();
    } catch (IndexOutOfBoundsException e) {
      // expected
    }

    try {
      TERTIARY_LIST.get(3);
      fail();
    } catch (IndexOutOfBoundsException e) {
      // expected
    }
  }

  public void testGetBoolean() {
    assertEquals(true, TERTIARY_LIST.getBoolean(0));
    assertEquals(false, TERTIARY_LIST.getBoolean(1));
    assertEquals(true, TERTIARY_LIST.getBoolean(2));

    try {
      TERTIARY_LIST.get(-1);
      fail();
    } catch (IndexOutOfBoundsException e) {
      // expected
    }

    try {
      TERTIARY_LIST.get(3);
      fail();
    } catch (IndexOutOfBoundsException e) {
      // expected
    }
  }

  public void testSize() {
    assertEquals(0, BooleanArrayList.emptyList().size());
    assertEquals(1, UNARY_LIST.size());
    assertEquals(3, TERTIARY_LIST.size());

    list.addBoolean(true);
    list.addBoolean(false);
    list.addBoolean(false);
    list.addBoolean(false);
    assertEquals(4, list.size());

    list.remove(0);
    assertEquals(3, list.size());

    list.add(true);
    assertEquals(4, list.size());
  }

  public void testSet() {
    list.addBoolean(false);
    list.addBoolean(false);

    assertEquals(false, (boolean) list.set(0, true));
    assertEquals(true, list.getBoolean(0));

    assertEquals(false, (boolean) list.set(1, false));
    assertEquals(false, list.getBoolean(1));

    try {
      list.set(-1, false);
      fail();
    } catch (IndexOutOfBoundsException e) {
      // expected
    }

    try {
      list.set(2, false);
      fail();
    } catch (IndexOutOfBoundsException e) {
      // expected
    }
  }

  public void testSetBoolean() {
    list.addBoolean(true);
    list.addBoolean(true);

    assertEquals(true, list.setBoolean(0, false));
    assertEquals(false, list.getBoolean(0));

    assertEquals(true, list.setBoolean(1, false));
    assertEquals(false, list.getBoolean(1));

    try {
      list.setBoolean(-1, false);
      fail();
    } catch (IndexOutOfBoundsException e) {
      // expected
    }

    try {
      list.setBoolean(2, false);
      fail();
    } catch (IndexOutOfBoundsException e) {
      // expected
    }
  }

  public void testAdd() {
    assertEquals(0, list.size());

    assertTrue(list.add(false));
    assertEquals(asList(false), list);

    assertTrue(list.add(true));
    list.add(0, false);
    assertEquals(asList(false, false, true), list);

    list.add(0, true);
    list.add(0, false);
    // Force a resize by getting up to 11 elements.
    for (int i = 0; i < 6; i++) {
      list.add(i % 2 == 0);
    }
    assertEquals(
        asList(false, true, false, false, true, true, false, true, false, true, false), list);

    try {
      list.add(-1, true);
    } catch (IndexOutOfBoundsException e) {
      // expected
    }

    try {
      list.add(4, true);
    } catch (IndexOutOfBoundsException e) {
      // expected
    }
  }

  public void testAddBoolean() {
    assertEquals(0, list.size());

    list.addBoolean(false);
    assertEquals(asList(false), list);

    list.addBoolean(true);
    assertEquals(asList(false, true), list);
  }

  public void testAddAll() {
    assertEquals(0, list.size());

    assertTrue(list.addAll(Collections.singleton(true)));
    assertEquals(1, list.size());
    assertEquals(true, (boolean) list.get(0));
    assertEquals(true, list.getBoolean(0));

    assertTrue(list.addAll(asList(false, true, false, true, false)));
    assertEquals(asList(true, false, true, false, true, false), list);

    assertTrue(list.addAll(TERTIARY_LIST));
    assertEquals(asList(true, false, true, false, true, false, true, false, true), list);

    assertFalse(list.addAll(Collections.<Boolean>emptyList()));
    assertFalse(list.addAll(BooleanArrayList.emptyList()));
  }

  public void testEquals() {
    BooleanArrayList list1 = new BooleanArrayList();
    BooleanArrayList list2 = new BooleanArrayList();

    assertEquals(list1, list2);
  }

  public void testRemove() {
    list.addAll(TERTIARY_LIST);
    assertEquals(true, (boolean) list.remove(0));
    assertEquals(asList(false, true), list);

    assertTrue(list.remove(Boolean.TRUE));
    assertEquals(asList(false), list);

    assertFalse(list.remove(Boolean.TRUE));
    assertEquals(asList(false), list);

    assertEquals(false, (boolean) list.remove(0));
    assertEquals(asList(), list);

    try {
      list.remove(-1);
      fail();
    } catch (IndexOutOfBoundsException e) {
      // expected
    }

    try {
      list.remove(0);
    } catch (IndexOutOfBoundsException e) {
      // expected
    }
  }

  public void testRemoveEnd_listAtCapacity() {
    BooleanList toRemove = BooleanArrayList.emptyList().mutableCopyWithCapacity(1);
    toRemove.addBoolean(true);
    toRemove.remove(0);
    assertEquals(0, toRemove.size());
  }

  public void testRemove_listAtCapacity() {
    BooleanList toRemove = BooleanArrayList.emptyList().mutableCopyWithCapacity(2);
    toRemove.addBoolean(true);
    toRemove.addBoolean(false);
    toRemove.remove(0);
    assertEquals(1, toRemove.size());
    assertEquals(false, (boolean) toRemove.get(0));
  }

  public void testSublistRemoveEndOfCapacity() {
    BooleanList toRemove = BooleanArrayList.emptyList().mutableCopyWithCapacity(1);
    toRemove.addBoolean(true);
    toRemove.subList(0, 1).clear();
    assertEquals(0, toRemove.size());
  }

  private void assertImmutable(BooleanList list) {

    try {
      list.add(true);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.add(0, true);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.addAll(Collections.<Boolean>emptyList());
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.addAll(Collections.singletonList(true));
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.addAll(new BooleanArrayList());
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.addAll(UNARY_LIST);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.addAll(0, Collections.singleton(true));
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.addAll(0, UNARY_LIST);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.addAll(0, Collections.<Boolean>emptyList());
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.addBoolean(false);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.clear();
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.remove(1);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.remove(new Object());
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.removeAll(Collections.<Boolean>emptyList());
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.removeAll(Collections.singleton(Boolean.TRUE));
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.removeAll(UNARY_LIST);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.retainAll(Collections.<Boolean>emptyList());
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.removeAll(Collections.singleton(Boolean.TRUE));
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.retainAll(UNARY_LIST);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.set(0, false);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }

    try {
      list.setBoolean(0, false);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
  }

  private static BooleanArrayList newImmutableBooleanArrayList(boolean... elements) {
    BooleanArrayList list = new BooleanArrayList();
    for (boolean element : elements) {
      list.addBoolean(element);
    }
    list.makeImmutable();
    return list;
  }
}
