code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC 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.openqa.selenium.grid.web;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.io.Reader;
  import java.io.StringReader;
  import java.io.StringWriter;
  import org.junit.jupiter.api.Test;
  import org.openqa.selenium.json.Json;
  import org.openqa.selenium.json.JsonInput;
  
  class TeeReaderTest {
  
    @Test
    void shouldDuplicateStreams() {
      String expected = "{\"key\": \"value\"}";
      Reader source = new StringReader(expected);
  
      StringWriter writer = new StringWriter();
  
      Reader tee = new TeeReader(source, writer);
  
      try (JsonInput reader = new Json().newInput(tee)) {
  
        reader.beginObject();
        assertEquals("key", reader.nextName());
        reader.skipValue();
        reader.endObject();
  
        assertEquals(expected, writer.toString());
      }
    }
  }
  