/*
    * 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.maven.plugins.shade.resource;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.util.Collections;
  import java.util.List;
  import java.util.Locale;
  
  import org.apache.maven.plugins.shade.relocation.Relocator;
  import org.junit.Before;
  import org.junit.Test;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  
  /**
   * Test for {@link ApacheNoticeResourceTransformer}.
   *
   * @author Benjamin Bentmann
   */
  public class ApacheNoticeResourceTransformerTest {
  
      private static final String NOTICE_RESOURCE = "META-INF/NOTICE";
      private ApacheNoticeResourceTransformer transformer;
  
      static {
          /*
           * NOTE: The Turkish locale has an usual case transformation for the letters "I" and "i", making it a prime
           * choice to test for improper case-less string comparisions.
           */
          Locale.setDefault(new Locale("tr"));
      }
  
      @Before
      public void setUp() {
          transformer = new ApacheNoticeResourceTransformer();
      }
  
      @Test
      public void testCanTransformResource() {
          assertTrue(transformer.canTransformResource("META-INF/NOTICE"));
          assertTrue(transformer.canTransformResource("META-INF/NOTICE.TXT"));
          assertTrue(transformer.canTransformResource("META-INF/NOTICE.md"));
          assertTrue(transformer.canTransformResource("META-INF/Notice.txt"));
          assertTrue(transformer.canTransformResource("META-INF/Notice.md"));
          assertFalse(transformer.canTransformResource("META-INF/MANIFEST.MF"));
      }
  
      @Test
      public void testNoParametersShouldNotThrowNullPointerWhenNoInput() throws IOException {
          processAndFailOnNullPointer("");
      }
  
      @Test
      public void testNoParametersShouldNotThrowNullPointerWhenNoLinesOfInput() throws IOException {
          processAndFailOnNullPointer("Some notice text");
      }
  
      @Test
      public void testNoParametersShouldNotThrowNullPointerWhenOneLineOfInput() throws IOException {
          processAndFailOnNullPointer("Some notice text\n");
      }
  
      @Test
      public void testNoParametersShouldNotThrowNullPointerWhenTwoLinesOfInput() throws IOException {
          processAndFailOnNullPointer("Some notice text\nSome notice text\n");
      }
  
      @Test
      public void testNoParametersShouldNotThrowNullPointerWhenLineStartsWithSlashSlash() throws IOException {
          processAndFailOnNullPointer("Some notice text\n//Some notice text\n");
      }
  
      @Test
      public void testNoParametersShouldNotThrowNullPointerWhenLineIsSlashSlash() throws IOException {
          processAndFailOnNullPointer("//\n");
      }
  
      @Test
      public void testNoParametersShouldNotThrowNullPointerWhenLineIsEmpty() throws IOException {
         processAndFailOnNullPointer("\n");
     }
 
     private void processAndFailOnNullPointer(final String noticeText) throws IOException {
         try {
             final ByteArrayInputStream noticeInputStream = new ByteArrayInputStream(noticeText.getBytes());
             final List<Relocator> emptyList = Collections.emptyList();
             transformer.processResource(NOTICE_RESOURCE, noticeInputStream, emptyList, 0);
             noticeInputStream.close();
         } catch (NullPointerException e) {
             fail("Null pointer should not be thrown when no parameters are set.");
         }
     }
 }