content: /*
   * Copyright (C) 2019 The Android Open Source Project
   *
   * 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 com.google.android.exoplayer2.mediacodec;
  
  import static com.google.common.truth.Truth.assertThat;
  import static org.junit.Assert.fail;
  
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import java.util.NoSuchElementException;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  /** Tests for {@link IntArrayQueue}. */
  @RunWith(AndroidJUnit4.class)
  public class IntArrayQueueTest {
  
    @Test
    public void add_willDoubleCapacity() {
      IntArrayQueue queue = new IntArrayQueue();
      int capacity = queue.capacity();
  
      for (int i = 0; i <= capacity; i++) {
        queue.add(i);
      }
  
      assertThat(queue.capacity()).isEqualTo(2 * capacity);
      assertThat(queue.size()).isEqualTo(capacity + 1);
    }
  
    @Test
    public void isEmpty_returnsTrueAfterConstruction() {
      IntArrayQueue queue = new IntArrayQueue();
  
      assertThat(queue.isEmpty()).isTrue();
    }
  
    @Test
    public void isEmpty_returnsFalseAfterAddition() {
      IntArrayQueue queue = new IntArrayQueue();
      queue.add(0);
  
      assertThat(queue.isEmpty()).isFalse();
    }
  
    @Test
    public void isEmpty_returnsFalseAfterRemoval() {
      IntArrayQueue queue = new IntArrayQueue();
      queue.add(0);
      queue.remove();
  
      assertThat(queue.isEmpty()).isTrue();
    }
  
    @Test
    public void remove_onEmptyQueue_throwsException() {
      IntArrayQueue queue = new IntArrayQueue();
  
      try {
        queue.remove();
        fail();
      } catch (NoSuchElementException expected) {
        // expected
      }
    }
  
    @Test
    public void remove_returnsCorrectItem() {
      IntArrayQueue queue = new IntArrayQueue();
      int value = 20;
      queue.add(value);
  
      assertThat(queue.remove()).isEqualTo(value);
    }
  
    @Test
    public void remove_untilIsEmpty() {
      IntArrayQueue queue = new IntArrayQueue();
      for (int i = 0; i < 1024; i++) {
        queue.add(i);
      }
  
      int expectedRemoved = 0;
      while (!queue.isEmpty()) {
        if (expectedRemoved == 15) {
          System.out.println("foo");
        }
        int removed = queue.remove();
        assertThat(removed).isEqualTo(expectedRemoved++);
      }
    }
  
    @Test
    public void remove_withResize_returnsCorrectItem() {
      IntArrayQueue queue = new IntArrayQueue();
      int nextToAdd = 0;
  
      while (queue.size() < queue.capacity()) {
        queue.add(nextToAdd++);
      }
  
      queue.remove();
      queue.remove();
  
      // This will force the queue to wrap-around and then resize
      int howManyToResize = queue.capacity() - queue.size() + 1;
      for (int i = 0; i < howManyToResize; i++) {
        queue.add(nextToAdd++);
      }
  
      assertThat(queue.remove()).isEqualTo(2);
    }
  
    @Test
    public void clear_resetsQueue() {
      IntArrayQueue queue = new IntArrayQueue();
  
      // Add items until array re-sizes twice (capacity grows by 4)
      for (int i = 0; i < 1024; i++) {
        queue.add(i);
      }
  
      queue.clear();
  
      assertThat(queue.size()).isEqualTo(0);
      assertThat(queue.isEmpty()).isTrue();
    }
  }
  