TestTJSONProtocol.java

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 * 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,
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package org.apache.thrift.protocol;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;

import java.nio.charset.StandardCharsets;
import org.apache.thrift.TException;
import org.apache.thrift.transport.TMemoryBuffer;
import org.junit.jupiter.api.Test;

public class TestTJSONProtocol extends ProtocolTestBase {
  @Override
  protected TProtocolFactory getFactory() {
    return new TJSONProtocol.Factory();
  }

  @Override
  protected boolean canBeUsedNaked() {
    return false;
  }

  @Test
  public void testEscapedUnicode() throws TException {
    String jsonString = "\"hello unicode \\u0e01\\ud834\\udd1e world\"";
    String expectedString = "hello unicode \u0e01\ud834\udd1e world";

    TMemoryBuffer buffer = new TMemoryBuffer(1000);
    TJSONProtocol protocol = new TJSONProtocol(buffer);
    buffer.write(jsonString.getBytes(StandardCharsets.UTF_8));

    assertEquals(expectedString, protocol.readString());
  }

  @Test
  public void testEscapedUnicodeAboveU7FFF() throws TException {
    // Regression test for https://issues.apache.org/jira/browse/THRIFT-4408.
    // Escapes from \u8000 up to \uffff are code units with the top bit set.
    String jsonString = "\"\\uff1c\\u8000\\uffff\"";
    String expectedString = "\uff1c\u8000\uffff";

    TMemoryBuffer buffer = new TMemoryBuffer(1000);
    TJSONProtocol protocol = new TJSONProtocol(buffer);
    buffer.write(jsonString.getBytes(StandardCharsets.UTF_8));

    assertEquals(expectedString, protocol.readString());
  }

  @Test
  public void testUnpairedHighSurrogate() throws TException {
    // A high surrogate has to be followed by a low surrogate escape, whether the
    // string ends, continues with a plain character, or continues with another
    // non-surrogate escape.
    String[] jsonStrings = {"\"\\ud834\"", "\"\\ud834a\"", "\"\\ud834\\u0041\\udd1e\""};
    for (String jsonString : jsonStrings) {
      TMemoryBuffer buffer = new TMemoryBuffer(1000);
      TJSONProtocol protocol = new TJSONProtocol(buffer);
      buffer.write(jsonString.getBytes(StandardCharsets.UTF_8));

      TProtocolException e = assertThrows(TProtocolException.class, protocol::readString);
      assertEquals(TProtocolException.INVALID_DATA, e.getType());
    }
  }

  @Test
  public void testExactlySizedBuffer() throws TException {
    // Regression test for https://issues.apache.org/jira/browse/THRIFT-5383.
    // Ensures that a JSON string can be read after writing to a buffer just
    // large enough to contain it.
    String inputString = "abcdefg";
    TMemoryBuffer buffer = new TMemoryBuffer(inputString.length() + 2);

    TJSONProtocol protocol = new TJSONProtocol(buffer);
    protocol.writeString(inputString);
    String outputString = protocol.readString();

    assertEquals(inputString, outputString);
  }
}