/**
 * 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.hadoop.http;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import org.junit.Test;

public class TestHtmlQuoting {

  @Test public void testNeedsQuoting() throws Exception {
    assertTrue(HtmlQuoting.needsQuoting("abcde>"));
    assertTrue(HtmlQuoting.needsQuoting("<abcde"));
    assertTrue(HtmlQuoting.needsQuoting("abc'de"));
    assertTrue(HtmlQuoting.needsQuoting("abcde\""));
    assertTrue(HtmlQuoting.needsQuoting("&"));
    assertFalse(HtmlQuoting.needsQuoting(""));
    assertFalse(HtmlQuoting.needsQuoting("ab\ncdef"));
    assertFalse(HtmlQuoting.needsQuoting(null));
  }

  @Test public void testQuoting() throws Exception {
    assertEquals("ab&lt;cd", HtmlQuoting.quoteHtmlChars("ab<cd"));
    assertEquals("ab&gt;", HtmlQuoting.quoteHtmlChars("ab>"));
    assertEquals("&amp;&amp;&amp;", HtmlQuoting.quoteHtmlChars("&&&"));
    assertEquals(" &apos;\n", HtmlQuoting.quoteHtmlChars(" '\n"));
    assertEquals("&quot;", HtmlQuoting.quoteHtmlChars("\""));
    assertEquals(null, HtmlQuoting.quoteHtmlChars(null));
  }

  private void runRoundTrip(String str) throws Exception {
    assertEquals(str, 
                 HtmlQuoting.unquoteHtmlChars(HtmlQuoting.quoteHtmlChars(str)));
  }
  
  @Test public void testRoundtrip() throws Exception {
    runRoundTrip("");
    runRoundTrip("<>&'\"");
    runRoundTrip("ab>cd<ef&ghi'\"");
    runRoundTrip("A string\n with no quotable chars in it!");
    runRoundTrip(null);
    StringBuilder buffer = new StringBuilder();
    for(char ch=0; ch < 127; ++ch) {
      buffer.append(ch);
    }
    runRoundTrip(buffer.toString());
  }
}