/**
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.hdds.server.http;

import static org.junit.Assert.*;

import javax.servlet.http.HttpServletRequest;

import org.junit.Test;
import org.mockito.Mockito;

/**
 * Testing HTML Quoting.
 */
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());
  }

  @Test
  public void testRequestQuoting() throws Exception {
    HttpServletRequest mockReq = Mockito.mock(HttpServletRequest.class);
    HttpServer2.QuotingInputFilter.RequestQuoter quoter =
        new HttpServer2.QuotingInputFilter.RequestQuoter(mockReq);

    Mockito.doReturn("a<b").when(mockReq).getParameter("x");
    assertEquals("Test simple param quoting",
        "a&lt;b", quoter.getParameter("x"));

    Mockito.doReturn(null).when(mockReq).getParameter("x");
    assertEquals("Test that missing parameters dont cause NPE",
        null, quoter.getParameter("x"));

    Mockito.doReturn(new String[] {"a<b", "b"}).when(mockReq)
        .getParameterValues("x");
    assertArrayEquals("Test escaping of an array",
        new String[] {"a&lt;b", "b"}, quoter.getParameterValues("x"));

    Mockito.doReturn(null).when(mockReq).getParameterValues("x");
    assertArrayEquals("Test that missing parameters dont cause NPE for array",
        null, quoter.getParameterValues("x"));
  }
}