/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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 org.apache.commons.io.input;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.io.IOException;
  import java.time.Duration;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link ThrottledInputStream}.
   */
  public class ThrottledInputStreamTest extends ProxyInputStreamTest<ThrottledInputStream> {
  
      @Override
      @SuppressWarnings("resource")
      protected ThrottledInputStream createFixture() throws IOException {
          return ThrottledInputStream.builder().setInputStream(createProxySource()).get();
      }
  
      @Test
      public void testCalSleepTimeMs() {
          // case 0: initial - no read, no sleep
          assertEquals(0, ThrottledInputStream.toSleepMillis(0, 10_000, 1_000));
  
          // case 1: no threshold
          assertEquals(0, ThrottledInputStream.toSleepMillis(Long.MAX_VALUE, 0, 1_000));
          assertEquals(0, ThrottledInputStream.toSleepMillis(Long.MAX_VALUE, -1, 1_000));
  
          // case 2: too fast
          assertEquals(1500, ThrottledInputStream.toSleepMillis(5, 2, 1_000));
          assertEquals(500, ThrottledInputStream.toSleepMillis(5, 2, 2_000));
          assertEquals(6500, ThrottledInputStream.toSleepMillis(15, 2, 1_000));
  
          // case 3: too slow
          assertEquals(0, ThrottledInputStream.toSleepMillis(1, 2, 1_000));
          assertEquals(0, ThrottledInputStream.toSleepMillis(2, 2, 2_000));
          assertEquals(0, ThrottledInputStream.toSleepMillis(1, 2, 1_000));
      }
  
      @Override
      protected void testEos(final ThrottledInputStream inputStream) {
          assertEquals(3, inputStream.getByteCount());
      }
  
      @Test
      public void testGet() throws IOException {
          try (ThrottledInputStream inputStream = createFixture()) {
              inputStream.read();
              assertEquals(Duration.ZERO, inputStream.getTotalSleepDuration());
          }
      }
  
  }