/*
    * 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 static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.io.IOException;
  import java.math.BigInteger;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link IOTriFunction}.
   */
  public class IOTriFunctionTest {
  
      /**
       * Tests {@link IOTriFunction#apply(Object, Object, Object)}.
       *
       * @throws IOException thrown on test failure
       */
      @Test
      public void testAccept() throws IOException {
          final AtomicReference<Character> ref1 = new AtomicReference<>();
          final AtomicReference<Short> ref2 = new AtomicReference<>();
          final AtomicReference<String> ref3 = new AtomicReference<>();
          final IOTriFunction<AtomicReference<Character>, AtomicReference<Short>, AtomicReference<String>, String> tri = (t, u, v) -> {
              ref1.set(Character.valueOf('a'));
              ref2.set(Short.valueOf((short) 1));
              ref3.set("z");
              return "ABC";
          };
          assertEquals("ABC", tri.apply(ref1, ref2, ref3));
          assertEquals(Character.valueOf('a'), ref1.get());
          assertEquals(Short.valueOf((short) 1), ref2.get());
          assertEquals("z", ref3.get());
      }
  
      /**
       * Tests {@link IOTriFunction#andThen(IOFunction)}.
       *
       * @throws IOException thrown on test failure
       */
      @Test
      public void testAndThenIOFunction() throws IOException {
          final AtomicReference<Character> ref1 = new AtomicReference<>();
          final AtomicReference<Short> ref2 = new AtomicReference<>();
          final AtomicReference<String> ref3 = new AtomicReference<>();
          final IOTriFunction<AtomicReference<Character>, AtomicReference<Short>, AtomicReference<String>, String> tri = (t, u, v) -> {
              ref1.set(Character.valueOf('a'));
              ref2.set(Short.valueOf((short) 1));
              ref3.set("z");
              return "9";
          };
          final IOFunction<String, BigInteger> after = t -> {
              ref1.set(Character.valueOf('b'));
              ref2.set(Short.valueOf((short) 2));
              ref3.set("zz");
              return BigInteger.valueOf(Long.parseLong(t)).add(BigInteger.ONE);
          };
          assertEquals(BigInteger.TEN, tri.andThen(after).apply(ref1, ref2, ref3));
          assertEquals(Character.valueOf('b'), ref1.get());
          assertEquals(Short.valueOf((short) 2), ref2.get());
          assertEquals("zz", ref3.get());
      }
  
  }