/*
    * 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.function;
  
  import java.io.IOException;
  import java.util.concurrent.atomic.AtomicInteger;
  import java.util.concurrent.atomic.AtomicLong;
  import java.util.concurrent.atomic.AtomicReference;
  
  final class TestUtils {
  
      static int compareAndSetThrowsIO(final AtomicInteger ref, final int update) throws IOException {
          return compareAndSetThrowsIO(ref, 0, update);
      }
  
      static int compareAndSetThrowsIO(final AtomicInteger ref, final int expected, final int update) throws IOException {
          if (!ref.compareAndSet(expected, update)) {
              throw new IOException("Unexpected");
          }
          return ref.get(); // same as update
      }
  
      static long compareAndSetThrowsIO(final AtomicLong ref, final long update) throws IOException {
          return compareAndSetThrowsIO(ref, 0, update);
      }
  
      static long compareAndSetThrowsIO(final AtomicLong ref, final long expected, final long update) throws IOException {
          if (!ref.compareAndSet(expected, update)) {
              throw new IOException("Unexpected");
          }
          return ref.get(); // same as update
      }
  
      static <T> T compareAndSetThrowsIO(final AtomicReference<T> ref, final T update) throws IOException {
          return compareAndSetThrowsIO(ref, null, update);
      }
  
      static <T> T compareAndSetThrowsIO(final AtomicReference<T> ref, final T expected, final T update) throws IOException {
          if (!ref.compareAndSet(expected, update)) {
              throw new IOException("Unexpected");
          }
          return ref.get(); // same as update
      }
  
      static <T> T compareAndSetThrowsRE(final AtomicReference<T> ref, final T expected, final T update) {
          if (!ref.compareAndSet(expected, update)) {
              throw new RuntimeException("Unexpected");
          }
          return ref.get(); // same as update
      }
  
      @SuppressWarnings("unchecked")
      static <T, U> IOBiConsumer<T, U> throwingIOBiConsumer() {
          return (IOBiConsumer<T, U>) TestConstants.THROWING_IO_BI_CONSUMER;
      }
  
      @SuppressWarnings("unchecked")
      static <T, U, V> IOBiFunction<T, U, V> throwingIOBiFunction() {
          return (IOBiFunction<T, U, V>) TestConstants.THROWING_IO_BI_FUNCTION;
      }
  
      @SuppressWarnings("unchecked")
      static <T> IOBinaryOperator<T> throwingIOBinaryOperator() {
          return (IOBinaryOperator<T>) TestConstants.THROWING_IO_BINARY_OPERATOR;
      }
  
      @SuppressWarnings("unchecked")
      static <T> IOComparator<T> throwingIOComparator() {
          return (IOComparator<T>) TestConstants.THROWING_IO_COMPARATOR;
      }
  
      @SuppressWarnings("unchecked")
      static <T> IOConsumer<T> throwingIOConsumer() {
          return (IOConsumer<T>) TestConstants.THROWING_IO_CONSUMER;
      }
  
      @SuppressWarnings("unchecked")
      static <T, U> IOFunction<T, U> throwingIOFunction() {
          return (IOFunction<T, U>) TestConstants.THROWING_IO_FUNCTION;
      }
  
      @SuppressWarnings("unchecked")
      static <T> IOPredicate<T> throwingIOPredicate() {
          return (IOPredicate<T>) TestConstants.THROWING_IO_PREDICATE;
     }
 
     static IORunnable throwingIORunnable() {
         return TestConstants.THROWING_IO_RUNNABLE;
     }
 
     @SuppressWarnings("unchecked")
     static <T> IOSupplier<T> throwingIOSupplier() {
         return (IOSupplier<T>) TestConstants.THROWING_IO_SUPPLIER;
     }
 
     @SuppressWarnings("unchecked")
     static <T> IOUnaryOperator<T> throwingIOUnaryOperator() {
         return (IOUnaryOperator<T>) TestConstants.THROWING_IO_UNARY_OPERATOR;
     }
 
 }