package org.apache.maven.shared.filtering;
   
   /*
    * 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.
   */
  
  import static org.junit.Assert.assertEquals;
  import static org.mockito.Matchers.eq;
  import static org.mockito.Matchers.isA;
  import static org.mockito.Mockito.when;
  
  import java.io.IOException;
  import java.io.Reader;
  import java.io.StringReader;
  
  import org.apache.commons.io.IOUtils;
  import org.codehaus.plexus.interpolation.Interpolator;
  import org.codehaus.plexus.interpolation.RecursionInterceptor;
  import org.junit.Before;
  import org.junit.Test;
  import org.mockito.Mock;
  import org.mockito.MockitoAnnotations;
  
  public abstract class AbstractInterpolatorFilterReaderLineEndingTest
  {
  
      @Mock
      private Interpolator interpolator;
  
      @Before
      public void onSetup()
      {
          MockitoAnnotations.initMocks( this );
      }
  
      @Test
      public void testDefaults()
          throws Exception
      {
          when( interpolator.interpolate( eq( "${a}" ), eq( "" ), isA( RecursionInterceptor.class ) ) ).thenReturn( "DONE_A" );
  
          Reader in = new StringReader( "text without expression" );
          Reader reader = getDollarBracesReader( in, interpolator, "\\" );
          assertEquals( "text without expression", IOUtils.toString( reader ) );
  
          in = new StringReader( "valid expression ${a}" );
          reader = getDollarBracesReader( in, interpolator, null );
          assertEquals( "valid expression DONE_A", IOUtils.toString( reader ) );
  
          in = new StringReader( "empty expression ${}" );
          reader = getDollarBracesReader( in, interpolator, null );
          assertEquals( "empty expression ${}", IOUtils.toString( reader ) );
  
          in = new StringReader( "dollar space expression $ {a}" );
          reader = getDollarBracesReader( in, interpolator, "\\" );
          assertEquals( "dollar space expression $ {a}", IOUtils.toString( reader ) );
  
          in = new StringReader( "space in expression ${ a}" );
          reader = getDollarBracesReader( in, interpolator, "\\" );
          assertEquals( "space in expression ${ a}", IOUtils.toString( reader ) );
  
          in = new StringReader( "escape dollar with expression \\${a}" );
          reader = getDollarBracesReader( in, interpolator, "\\" );
          assertEquals( "escape dollar with expression ${a}", IOUtils.toString( reader ) );
  
  //        in = new StringReader( "escape escape string before expression \\\\${a}" );
  //        reader = getDollarBracesReader( in, interpolator, "\\" );
  //        assertEquals( "escape escape string before expression \\DONE_A", IOUtils.toString( reader ) );
  //
  //        in = new StringReader( "escape escape string and expression \\\\\\${a}" );
  //        reader = getDollarBracesReader( in, interpolator, "\\" );
  //        assertEquals( "escape escape string before expression \\${a}", IOUtils.toString( reader ) );
  
          in = new StringReader( "unknown expression ${unknown}" );
          reader = getDollarBracesReader( in, interpolator, "\\" );
          assertEquals( "unknown expression ${unknown}", IOUtils.toString( reader ) );
      }
  
      // MSHARED-198: custom delimiters doesn't work as expected
      @Test
      public void testCustomDelimiters()
          throws Exception
      {
          when( interpolator.interpolate( eq( "aaaFILTER.a.MEaaa" ), eq( "" ), isA( RecursionInterceptor.class ) ) ).thenReturn( "DONE" );
         when( interpolator.interpolate( eq( "abcFILTER.a.MEabc" ), eq( "" ), isA( RecursionInterceptor.class ) ) ).thenReturn( "DONE" );
 
         Reader in = new StringReader( "aaaFILTER.a.MEaaa" );
         Reader reader = getAaa_AaaReader( in, interpolator );
 
         assertEquals( "DONE", IOUtils.toString( reader ) );
 
         in = new StringReader( "abcFILTER.a.MEabc" );
         reader = getAbc_AbcReader( in, interpolator );
         assertEquals( "DONE", IOUtils.toString( reader ) );
     }
 
     // MSHARED-235: reader exceeds readAheadLimit
     @Test
     public void testMarkInvalid() throws IOException
     {
         try ( Reader reader =
             getAtReader( new StringReader( "@\").replace(p,\"]\").replace(q,\"" ), interpolator, "\\" ) )
         {
             assertEquals( "@\").replace(p,\"]\").replace(q,\"", IOUtils.toString( reader ) );
         }
     }
 
     protected abstract Reader getAbc_AbcReader( Reader in, Interpolator interpolator );
 
     protected abstract Reader getAaa_AaaReader( Reader in, Interpolator interpolator );
 
     protected abstract Reader getDollarBracesReader( Reader in, Interpolator interpolator, String escapeString );
 
     protected abstract Reader getAtReader( Reader in, Interpolator interpolator, String escapeString );
 
 }