code: /*
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache 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://www.apache.org/licenses/LICENSE-2.0
   *
   * 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 io.reactivex.rxjava3.internal.util;
  
  import static org.junit.Assert.*;
  
  import java.util.*;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.RxJavaTest;
  import io.reactivex.rxjava3.functions.BiPredicate;
  import io.reactivex.rxjava3.internal.util.AppendOnlyLinkedArrayList.NonThrowingPredicate;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class MiscUtilTest extends RxJavaTest {
      @Test
      public void pow2UtilityClass() {
          TestHelper.checkUtilityClass(Pow2.class);
      }
  
      @Test
      public void isPowerOf2() {
          for (int i = 1; i > 0; i *= 2) {
              assertTrue(Pow2.isPowerOfTwo(i));
          }
  
          assertFalse(Pow2.isPowerOfTwo(3));
          assertFalse(Pow2.isPowerOfTwo(5));
          assertFalse(Pow2.isPowerOfTwo(6));
          assertFalse(Pow2.isPowerOfTwo(7));
      }
  
      @Test
      public void hashMapSupplier() {
          TestHelper.checkEnum(HashMapSupplier.class);
      }
  
      @Test
      public void arrayListSupplier() {
          TestHelper.checkEnum(ArrayListSupplier.class);
      }
  
      @Test
      public void errorModeEnum() {
          TestHelper.checkEnum(ErrorMode.class);
      }
  
      @Test
      public void linkedArrayList() {
          LinkedArrayList list = new LinkedArrayList(2);
          assertEquals(0, list.size());
          list.add(1);
          assertEquals(1, list.size());
          list.add(2);
          assertEquals(2, list.size());
          list.add(3);
          assertEquals(3, list.size());
          assertEquals("[1, 2, 3]", list.toString());
      }
  
      @Test
      public void appendOnlyLinkedArrayListForEachWhile() throws Exception {
          AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(2);
  
          list.add(1);
          list.add(2);
          list.add(3);
  
          final List<Integer> out = new ArrayList<>();
  
          list.forEachWhile(new NonThrowingPredicate<Integer>() {
              @Override
              public boolean test(Integer t2) {
                  out.add(t2);
                  return t2 == 2;
              }
          });
  
          assertEquals(Arrays.asList(1, 2), out);
      }
  
      @Test
      public void appendOnlyLinkedArrayListForEachWhileBi() throws Throwable {
          AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(2);
  
          list.add(1);
          list.add(2);
          list.add(3);
  
          final List<Integer> out = new ArrayList<>();
  
          list.forEachWhile(2, new BiPredicate<Integer, Integer>() {
              @Override
              public boolean test(Integer t1, Integer t2) throws Throwable {
                  out.add(t2);
                  return t1.equals(t2);
              }
          });
  
          assertEquals(Arrays.asList(1, 2), out);
      }
  
      @Test
      public void appendOnlyLinkedArrayListForEachWhilePreGrow() throws Exception {
          AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(12);
  
          list.add(1);
          list.add(2);
          list.add(3);
  
          final List<Integer> out = new ArrayList<>();
  
          list.forEachWhile(new NonThrowingPredicate<Integer>() {
              @Override
              public boolean test(Integer t2) {
                  out.add(t2);
                  return t2 == 2;
              }
          });
  
          assertEquals(Arrays.asList(1, 2), out);
      }
  
      @Test
      public void appendOnlyLinkedArrayListForEachWhileExact() throws Exception {
          AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(3);
  
          list.add(1);
          list.add(2);
          list.add(3);
  
          final List<Integer> out = new ArrayList<>();
  
          list.forEachWhile(new NonThrowingPredicate<Integer>() {
              @Override
              public boolean test(Integer t2) {
                  out.add(t2);
                  return t2 == 2;
              }
          });
  
          assertEquals(Arrays.asList(1, 2), out);
      }
  
      @Test
      public void appendOnlyLinkedArrayListForEachWhileAll() throws Exception {
          AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(2);
  
          list.add(1);
          list.add(2);
          list.add(3);
  
          final List<Integer> out = new ArrayList<>();
  
          list.forEachWhile(new NonThrowingPredicate<Integer>() {
              @Override
              public boolean test(Integer t2) {
                  out.add(t2);
                  return t2 == 3;
              }
          });
  
          assertEquals(Arrays.asList(1, 2, 3), out);
      }
  
      @Test
      public void appendOnlyLinkedArrayListForEachWhileBigger() throws Exception {
          AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(4);
  
          list.add(1);
          list.add(2);
          list.add(3);
  
          final List<Integer> out = new ArrayList<>();
  
          list.forEachWhile(new NonThrowingPredicate<Integer>() {
              @Override
              public boolean test(Integer t2) {
                  out.add(t2);
                  return false;
              }
          });
  
          assertEquals(Arrays.asList(1, 2, 3), out);
      }
  
      @Test
      public void appendOnlyLinkedArrayListForEachWhileBiPreGrow() throws Throwable {
          AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(12);
  
          list.add(1);
          list.add(2);
          list.add(3);
  
          final List<Integer> out = new ArrayList<>();
  
          list.forEachWhile(2, new BiPredicate<Integer, Integer>() {
              @Override
              public boolean test(Integer t1, Integer t2) throws Throwable {
                  out.add(t2);
                  return t1.equals(t2);
              }
          });
  
          assertEquals(Arrays.asList(1, 2), out);
      }
  
      @Test
      public void appendOnlyLinkedArrayListForEachWhileBiExact() throws Throwable {
          AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(3);
  
          list.add(1);
          list.add(2);
          list.add(3);
  
          final List<Integer> out = new ArrayList<>();
  
          list.forEachWhile(2, new BiPredicate<Integer, Integer>() {
              @Override
              public boolean test(Integer t1, Integer t2) throws Exception {
                  out.add(t2);
                  return t1.equals(t2);
              }
          });
  
          assertEquals(Arrays.asList(1, 2), out);
      }
  
      @Test
      public void appendOnlyLinkedArrayListForEachWhileBiAll() throws Throwable {
          AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(2);
  
          list.add(1);
          list.add(2);
          list.add(3);
  
          final List<Integer> out = new ArrayList<>();
  
          list.forEachWhile(3, new BiPredicate<Integer, Integer>() {
              @Override
              public boolean test(Integer t1, Integer t2) throws Exception {
                  out.add(t2);
                  return false;
              }
          });
  
          assertEquals(Arrays.asList(1, 2, 3), out);
      }
  
      @Test
      public void queueDrainHelperUtility() {
          TestHelper.checkUtilityClass(QueueDrainHelper.class);
      }
  }
  