/**
 * 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.hbase.http;

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

import javax.servlet.http.HttpServletRequest;
import org.apache.hadoop.hbase.HBaseClassTestRule;
import org.apache.hadoop.hbase.testclassification.MiscTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.ClassRule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.mockito.Mockito;

@Category({MiscTests.class, SmallTests.class})
public class TestHtmlQuoting {
  @ClassRule
  public static final HBaseClassTestRule CLASS_RULE =
      HBaseClassTestRule.forClass(TestHtmlQuoting.class);

  @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);
    HttpServer.QuotingInputFilter.RequestQuoter quoter =
      new HttpServer.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"));
  }
}
