/*
    * 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.rat.header;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.io.StringReader;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  
  public class FilteringSequenceFactoryTest {
  
      private int capacity;
      private FilteringSequenceFactory factory;
      private SimpleCharFilter filter;
  
      @BeforeEach
      public void setUp() throws Exception {
          capacity = 50;
          filter = new SimpleCharFilter();
          factory = new FilteringSequenceFactory(capacity, filter);
      }
  
      @Test
      public void noFiltering() throws Exception {
          final String INPUT = "Whatever";
          StringReader reader = new StringReader(INPUT);
          CharSequence result = factory.filter(reader);
          assertNotNull(result);
          String output = result.toString();
          assertEquals(INPUT, output, "No filtering so input equals output.");
          reader = new StringReader(INPUT);
          result = factory.filter(reader);
          assertNotNull(result);
          output = result.toString();
          assertEquals(INPUT, output, "No filtering so input equals output. Independent of previous input");
      }
  
      @Test
      public void filtering() throws Exception {
          final String INPUT = "Whatever";
          StringReader reader = new StringReader(INPUT);
          CharSequence result = factory.filter(reader);
          assertNotNull(result);
          String output = result.toString();
          assertEquals(INPUT, output, "No filtering so input equals output.");
          filter.filterOut = true;
          reader = new StringReader(INPUT);
          result = factory.filter(reader);
          assertNotNull(result);
          assertEquals( 0, result.length(), "All filtered output is empty. Independent of previous input");
      }
      
      @Test
      public void overCapacity() throws Exception {
          final String INPUT = "WhateverWhateverWhateverWhateverWhateverWhateverWhateverWhateverWhateverWhatever";
          StringReader reader = new StringReader(INPUT);
          CharSequence result = factory.filter(reader);
          assertNotNull(result);
          String output = result.toString();
          assertEquals(INPUT.substring(0, capacity), output, "No filtering so input equals output.");
      }
  }