/*
    * 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.commons.codec;
  
  import java.util.Locale;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   * @version $Id: StringEncoderAbstractTest.java 1571906 2014-02-26 04:09:25Z ggregory $
   */
  public abstract class StringEncoderAbstractTest<T extends StringEncoder> {
  
      protected T stringEncoder = this.createStringEncoder();
  
      public void checkEncoding(final String expected, final String source) throws EncoderException {
          Assert.assertEquals("Source: " + source, expected, this.getStringEncoder().encode(source));
      }
  
      protected void checkEncodings(final String[][] data) throws EncoderException {
          for (final String[] element : data) {
              this.checkEncoding(element[1], element[0]);
          }
      }
  
      protected void checkEncodingVariations(final String expected, final String data[]) throws EncoderException {
          for (final String element : data) {
              this.checkEncoding(expected, element);
          }
      }
  
      protected abstract T createStringEncoder();
  
      public T getStringEncoder() {
          return this.stringEncoder;
      }
  
      @Test
      public void testEncodeEmpty() throws Exception {
          final Encoder encoder = this.getStringEncoder();
          encoder.encode("");
          encoder.encode(" ");
          encoder.encode("\t");
      }
  
      @Test
      public void testEncodeNull() throws Exception {
          final StringEncoder encoder = this.getStringEncoder();
          try {
              encoder.encode(null);
          } catch (final EncoderException ee) {
              // An exception should be thrown
          }
      }
  
      @Test
      public void testEncodeWithInvalidObject() throws Exception {
          boolean exceptionThrown = false;
          try {
              final StringEncoder encoder = this.getStringEncoder();
              encoder.encode(new Float(3.4));
          } catch (final Exception e) {
              exceptionThrown = true;
          }
          Assert.assertTrue("An exception was not thrown when we tried to encode " + "a Float object", exceptionThrown);
      }
  
      @Test
      public void testLocaleIndependence() throws Exception {
          final StringEncoder encoder = this.getStringEncoder();
  
          final String[] data = {"I", "i",};
  
          final Locale orig = Locale.getDefault();
          final Locale[] locales = {Locale.ENGLISH, new Locale("tr"), Locale.getDefault()};
  
          try {
              for (final String element : data) {
                  String ref = null;
                  for (int j = 0; j < locales.length; j++) {
                      Locale.setDefault(locales[j]);
                      if (j <= 0) {
                          ref = encoder.encode(element);
                     } else {
                         String cur = null;
                         try {
                             cur = encoder.encode(element);
                         } catch (final Exception e) {
                             Assert.fail(Locale.getDefault().toString() + ": " + e.getMessage());
                         }
                         Assert.assertEquals(Locale.getDefault().toString() + ": ", ref, cur);
                     }
                 }
             }
         } finally {
             Locale.setDefault(orig);
         }
     }
 
 }