/*
    * 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.any23.http;
  
  import org.apache.any23.mime.MIMEType;
  import org.junit.Assert;
  import org.junit.Test;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  
  /**
   * Reference test for {@link AcceptHeaderBuilder}
   * 
   */
  public class AcceptHeaderBuilderTest {
  
      @Test
      public void testEmpty() {
          Assert.assertNull(buildHeader(Collections.<String> emptyList()));
      }
  
      @Test
      public void testSingleHeaderSpecific() {
          Assert.assertEquals("text/html", buildHeader(Arrays.asList("text/html")));
      }
  
      @Test
      public void testSingleHeaderSpecificWithQ() {
          Assert.assertEquals("text/html;q=0.5", buildHeader(Arrays.asList("text/html;q=0.5")));
      }
  
      @Test
      public void testSuppressQIfEquals1() {
          Assert.assertEquals("text/html", buildHeader(Arrays.asList("text/html;q=1")));
      }
  
      @Test
      public void testSingleHeaderSubtypeWildcard() {
          Assert.assertEquals("text/*;q=0.5", buildHeader(Arrays.asList("text/*;q=0.5")));
      }
  
      @Test
      public void testSingleHeaderTypeWildcard() {
          Assert.assertEquals("*/*;q=0.5", buildHeader(Arrays.asList("*/*;q=0.5")));
      }
  
      @Test
      public void testMultipleIndependentHeaders() {
          Assert.assertEquals("image/jpeg;q=0.2, text/html, text/plain;q=0.5",
                  buildHeader(Arrays.asList("image/jpeg;q=0.2", "text/html;q=1.0", "text/plain;q=0.5")));
      }
  
      @Test
      public void testHighestSpecificValueIsChosen() {
          Assert.assertEquals("image/jpeg", buildHeader(Arrays.asList("image/jpeg;q=0.2", "image/jpeg")));
          Assert.assertEquals("image/jpeg", buildHeader(Arrays.asList("image/jpeg", "image/jpeg;q=0.2")));
      }
  
      @Test
      public void testHighestSubtypeWildcardIsChosen() {
          Assert.assertEquals("image/*", buildHeader(Arrays.asList("image/*;q=0.2", "image/*")));
          Assert.assertEquals("image/*", buildHeader(Arrays.asList("image/*", "image/*;q=0.2")));
      }
  
      @Test
      public void testHighestTypeWildcardIsChosen() {
          Assert.assertEquals("*/*", buildHeader(Arrays.asList("*/*;q=0.2", "*/*")));
          Assert.assertEquals("*/*", buildHeader(Arrays.asList("*/*", "*/*;q=0.2")));
      }
  
      @Test
      public void testTypeWildcardSuppressesLowerValues() {
          Assert.assertEquals("*/*;q=0.5", buildHeader(Arrays.asList("*/*;q=0.5", "image/*;q=0.2")));
          Assert.assertEquals("*/*;q=0.5", buildHeader(Arrays.asList("*/*;q=0.5", "image/jpeg;q=0.2")));
      }
  
      @Test
      public void testSubtypeWildcardSuppressesLowerValues() {
          Assert.assertEquals("image/*;q=0.5", buildHeader(Arrays.asList("image/*;q=0.5", "image/jpeg;q=0.2")));
      }
  
     private String buildHeader(Collection<String> mimeTypes) {
         Collection<MIMEType> parsedTypes = new ArrayList<MIMEType>();
         for (String s : mimeTypes) {
             parsedTypes.add(MIMEType.parse(s));
         }
         return new AcceptHeaderBuilder(parsedTypes).getAcceptHeader();
     }
 }