content: package com.alibaba.fastjson2.issues;
  
  import com.alibaba.fastjson2.JSON;
  import com.alibaba.fastjson2.JSONWriter;
  import com.alibaba.fastjson2.TestUtils;
  import org.junit.jupiter.api.Test;
  
  import java.nio.charset.StandardCharsets;
  
  import static com.alibaba.fastjson2.util.JDKUtils.STRING_VALUE;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class Issue435 {
      @Test
      public void test() {
          char ch = 17;
          String str =
                  "{\"test\": \"Pixel 民" + ch + "\n XL\"}";
          Object object = com.alibaba.fastjson2.JSON.parse(str);
          assertEquals("{\"test\":\"Pixel 民\\u0011\\n XL\"}", JSON.toJSONString(object));
      }
  
      @Test
      public void testJSONBytes() {
          char ch = 17;
          String str =
                  "{\"test\": \"Pixel 民" + ch + "\n XL\"}";
          Object object = com.alibaba.fastjson2.JSON.parse(str);
          byte[] jsonBytes = JSON.toJSONBytes(object);
          String jsonStr = new String(jsonBytes, 0, jsonBytes.length, StandardCharsets.UTF_8);
          assertEquals("{\"test\":\"Pixel 民\\u0011\\n XL\"}", jsonStr);
      }
  
      @Test
      public void test256() {
          for (int i = 0; i < 256; ++i) {
              char ch = (char) i;
              String str = new String(new char[]{ch});
              String json = JSON.toJSONString(str);
              assertEquals(str, JSON.parse(json), "fail " + i);
          }
      }
  
      @Test
      public void test256Bytes() {
          for (int i = 0; i < 256; ++i) {
              char ch = (char) i;
              String str = new String(new char[]{ch});
              byte[] jsonBytes = JSON.toJSONBytes(str);
              assertEquals(str, JSON.parse(jsonBytes), "fail " + i);
          }
      }
  
      @Test
      public void test256All() {
          if (STRING_VALUE == null) {
              return;
          }
  
          for (int i = 0; i < 256; ++i) {
              char ch = (char) i;
              String str = new String(new char[]{ch});
  
              JSONWriter[] jsonWriters = TestUtils.createJSONWriters();
              for (JSONWriter jsonWriter : jsonWriters) {
                  jsonWriter.writeString(str);
                  String json = jsonWriter.toString();
                  assertEquals(str, JSON.parse(json), "fail " + i);
              }
          }
      }
  }
  