/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.hc.core5.http.message;
  
  import java.util.Iterator;
  import java.util.NoSuchElementException;
  
  import org.apache.hc.core5.http.Header;
  import org.apache.hc.core5.http.HeaderElement;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests for {@link BasicHeaderElementIterator}.
   *
   */
  public class TestBasicHeaderElementIterator {
  
      @Test
      public void testMultiHeader() {
          final Header[] headers = new Header[]{
                  new BasicHeader("Name", "value0"),
                  new BasicHeader("Name", "value1")
          };
  
          final Iterator<HeaderElement> hei = new BasicHeaderElementIterator(
                  new BasicHeaderIterator(headers, "Name"));
  
          Assertions.assertTrue(hei.hasNext());
          HeaderElement elem = hei.next();
          Assertions.assertEquals("value0", elem.getName(), "The two header values must be equal");
  
          Assertions.assertTrue(hei.hasNext());
          elem = hei.next();
          Assertions.assertEquals("value1", elem.getName(), "The two header values must be equal");
  
          Assertions.assertFalse(hei.hasNext());
          Assertions.assertThrows(NoSuchElementException.class, () -> hei.next());
  
          Assertions.assertFalse(hei.hasNext());
          Assertions.assertThrows(NoSuchElementException.class, () -> hei.next());
      }
  
      @Test
      public void testMultiHeaderSameLine() {
          final Header[] headers = new Header[]{
                  new BasicHeader("name", "value0,value1"),
                  new BasicHeader("nAme", "cookie1=1,cookie2=2")
          };
  
          final Iterator<HeaderElement> hei = new BasicHeaderElementIterator(
                  new BasicHeaderIterator(headers, "Name"));
  
          HeaderElement elem = hei.next();
          Assertions.assertEquals("value0", elem.getName(), "The two header values must be equal");
          elem = hei.next();
          Assertions.assertEquals("value1", elem.getName(), "The two header values must be equal");
          elem = hei.next();
          Assertions.assertEquals("cookie1", elem.getName(), "The two header values must be equal");
          Assertions.assertEquals("1", elem.getValue(), "The two header values must be equal");
  
          elem = hei.next();
          Assertions.assertEquals("cookie2", elem.getName(), "The two header values must be equal");
          Assertions.assertEquals("2", elem.getValue(), "The two header values must be equal");
      }
  
      @Test
      public void testFringeCases() {
          final Header[] headers = new Header[]{
                  new BasicHeader("Name", null),
                  new BasicHeader("Name", "    "),
                  new BasicHeader("Name", ",,,")
          };
  
          final Iterator<HeaderElement> hei = new BasicHeaderElementIterator(
                 new BasicHeaderIterator(headers, "Name"));
 
         Assertions.assertFalse(hei.hasNext());
         Assertions.assertThrows(NoSuchElementException.class, () -> hei.next());
         Assertions.assertFalse(hei.hasNext());
         Assertions.assertThrows(NoSuchElementException.class, () -> hei.next());
     }
 
 }