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    * 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.shared.filtering;
  
  import java.io.Reader;
  import java.io.StringReader;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashSet;
  
  import org.codehaus.plexus.interpolation.Interpolator;
  import org.codehaus.plexus.interpolation.RecursionInterceptor;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.mockito.ArgumentMatchers.eq;
  import static org.mockito.ArgumentMatchers.isA;
  import static org.mockito.Mockito.when;
  
  @ExtendWith(MockitoExtension.class)
  public class MultiDelimiterInterpolatorFilterReaderLineEndingTest
          extends AbstractInterpolatorFilterReaderLineEndingTest {
  
      @Mock
      private Interpolator interpolator;
  
      @Override
      protected Reader getAaa_AaaReader(Reader in, Interpolator interpolator) {
          MultiDelimiterInterpolatorFilterReaderLineEnding reader =
                  new MultiDelimiterInterpolatorFilterReaderLineEnding(in, interpolator, true);
          reader.setDelimiterSpecs(Collections.singleton("aaa*aaa"));
          return reader;
      }
  
      @Override
      protected Reader getAbc_AbcReader(Reader in, Interpolator interpolator) {
          MultiDelimiterInterpolatorFilterReaderLineEnding reader =
                  new MultiDelimiterInterpolatorFilterReaderLineEnding(in, interpolator, true);
          reader.setDelimiterSpecs(Collections.singleton("abc*abc"));
          return reader;
      }
  
      @Override
      protected Reader getDollarBracesReader(Reader in, Interpolator interpolator, String escapeString) {
          MultiDelimiterInterpolatorFilterReaderLineEnding reader =
                  new MultiDelimiterInterpolatorFilterReaderLineEnding(in, interpolator, true);
          reader.setDelimiterSpecs(Collections.singleton("${*}"));
          reader.setEscapeString(escapeString);
          return reader;
      }
  
      @Override
      protected Reader getAtReader(Reader in, Interpolator interpolator, String escapeString) {
          MultiDelimiterInterpolatorFilterReaderLineEnding reader =
                  new MultiDelimiterInterpolatorFilterReaderLineEnding(in, interpolator, true);
          reader.setDelimiterSpecs(Collections.singleton("@"));
          reader.setEscapeString(escapeString);
          return reader;
      }
  
      // MSHARED-199: Filtering doesn't work if 2 delimiters are used on the same line, the first one being left open
      @Test
      public void testLineWithSingleAtAndExpression() throws Exception {
          when(interpolator.interpolate(eq("${foo}"), eq(""), isA(RecursionInterceptor.class)))
                  .thenReturn("bar");
  
          Reader in = new StringReader("toto@titi.com ${foo}");
          MultiDelimiterInterpolatorFilterReaderLineEnding reader =
                  new MultiDelimiterInterpolatorFilterReaderLineEnding(in, interpolator, true);
          reader.setDelimiterSpecs(new HashSet<>(Arrays.asList("${*}", "@")));
  
          assertEquals("toto@titi.com bar", IOUtils.toString(reader));
      }
  
      // http://stackoverflow.com/questions/21786805/maven-war-plugin-customize-filter-delimitters-in-webresources/
      @Test
      public void testAtDollarExpression() throws Exception {
          when(interpolator.interpolate(eq("${db.server}"), eq(""), isA(RecursionInterceptor.class)))
                  .thenReturn("DB_SERVER");
          when(interpolator.interpolate(eq("${db.port}"), eq(""), isA(RecursionInterceptor.class)))
                 .thenReturn("DB_PORT");
         when(interpolator.interpolate(eq("${db.name}"), eq(""), isA(RecursionInterceptor.class)))
                 .thenReturn("DB_NAME");
 
         Reader in = new StringReader("  url=\"jdbc:oracle:thin:\\@${db.server}:${db.port}:${db.name}\"");
         MultiDelimiterInterpolatorFilterReaderLineEnding reader =
                 new MultiDelimiterInterpolatorFilterReaderLineEnding(in, interpolator, true);
         reader.setEscapeString("\\");
         reader.setDelimiterSpecs(new HashSet<>(Arrays.asList("${*}", "@")));
 
         assertEquals("  url=\"jdbc:oracle:thin:@DB_SERVER:DB_PORT:DB_NAME\"", IOUtils.toString(reader));
     }
 }