/*
 * 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.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

import javax.servlet.http.HttpServletRequest;
import org.apache.hadoop.hbase.testclassification.MiscTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import org.mockito.Mockito;

@Tag(MiscTests.TAG)
@Tag(SmallTests.TAG)
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);
    HttpServer.QuotingInputFilter.RequestQuoter quoter =
      new HttpServer.QuotingInputFilter.RequestQuoter(mockReq);

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

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

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

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