The following issues were found

src/test/java/com/alibaba/json/bvt/serializer/JSONObjectOrderTest.java
3 issues
System.out.println is used
Design

Line: 10 

              
public class JSONObjectOrderTest extends TestCase {
    public void test_for_order() throws Exception {
        System.out.println(JSON.VERSION);
        JSONObject jsonObj = new JSONObject(true);
        jsonObj.put("code","code");
        jsonObj.put("msg","msg");
        jsonObj.put("data", "data");
        String jsonStr = JSON.toJSONString(jsonObj, SerializerFeature.MapSortField);

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 9 

              import junit.framework.TestCase;

public class JSONObjectOrderTest extends TestCase {
    public void test_for_order() throws Exception {
        System.out.println(JSON.VERSION);
        JSONObject jsonObj = new JSONObject(true);
        jsonObj.put("code","code");
        jsonObj.put("msg","msg");
        jsonObj.put("data", "data");

Reported by PMD.

JUnit assertions should include a message
Design

Line: 16 

                      jsonObj.put("msg","msg");
        jsonObj.put("data", "data");
        String jsonStr = JSON.toJSONString(jsonObj, SerializerFeature.MapSortField);
        assertEquals("{\"code\":\"code\",\"msg\":\"msg\",\"data\":\"data\"}", jsonStr);
    }
}

Reported by PMD.

src/test/java/com/alibaba/json/bvt/parser/deser/generic/GenericArrayTest4.java
3 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 12 

              
public class GenericArrayTest4 extends TestCase {
    
    public void test_generic() throws Exception {
        VO vo = new VO();
        vo.values = new Pair[] {null, null};
        
        String text = JSON.toJSONString(vo);
//        VO vo1 = JSON.parseObject(text, new TypeReference<VO<Number, String>>(){} );

Reported by PMD.

Found non-transient, non-static member. Please mark as transient or provide accessors.
Error

Line: 26 

                  }

    public static class A<T extends Number, S> {
        public Pair<? extends T, ? extends S>[] values;
    }
    
    public static class VO extends A<Number, String> {
        
    }

Reported by PMD.

Avoid unused imports such as 'com.alibaba.fastjson.TypeReference'
Design

Line: 6 

              import org.junit.Assert;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;

import junit.framework.TestCase;

public class GenericArrayTest4 extends TestCase {

Reported by PMD.

src/test/java/com/alibaba/json/bvt/serializer/JSONFieldTest5.java
3 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 11 

              
public class JSONFieldTest5 extends TestCase {

    public void test_jsonField() throws Exception {
        VO vo = new VO();

        vo.setID(123);

        String text = JSON.toJSONString(vo);

Reported by PMD.

Potential violation of Law of Demeter (method chain calls)
Design

Line: 19 

                      String text = JSON.toJSONString(vo);
        Assert.assertEquals("{\"iD\":123}", text);
        
        Assert.assertEquals(123, JSON.parseObject(text, VO.class).getID());
    }

    public static class VO {

        private int id;

Reported by PMD.

Found non-transient, non-static member. Please mark as transient or provide accessors.
Error

Line: 24 

              
    public static class VO {

        private int id;

        public int getID() {
            return id;
        }

Reported by PMD.

src/test/java/com/alibaba/json/bvt/serializer/UnicodeTest.java
3 issues
System.out.println is used
Design

Line: 12 

              public class UnicodeTest extends TestCase {
    public void test_unicode() throws Exception {
        String text = JSON.toJSONString(Collections.singletonMap("v", "\u0018"));
        System.out.println(text);
    }
}

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 10 

              import junit.framework.TestCase;

public class UnicodeTest extends TestCase {
    public void test_unicode() throws Exception {
        String text = JSON.toJSONString(Collections.singletonMap("v", "\u0018"));
        System.out.println(text);
    }
}

Reported by PMD.

JUnit tests should include assert() or fail()
Design

Line: 10 

              import junit.framework.TestCase;

public class UnicodeTest extends TestCase {
    public void test_unicode() throws Exception {
        String text = JSON.toJSONString(Collections.singletonMap("v", "\u0018"));
        System.out.println(text);
    }
}

Reported by PMD.

src/test/java/com/alibaba/json/bvt/parser/taobao/SpecialStringTest.java
3 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 10 

              import junit.framework.TestCase;

public class SpecialStringTest extends TestCase {
    public void test_for_special() throws Exception {
        VO vo = new VO();
        vo.value = "{\"aurl\"";
        String text = JSON.toJSONString(vo);
        VO vo1 = JSON.parseObject(text, VO.class);
        Assert.assertEquals(vo1.value, vo.value);

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 18 

                      Assert.assertEquals(vo1.value, vo.value);
    }
    
    public void test_for_special_1() throws Exception {
        VO vo = new VO();
        vo.value = "{\"aurl\":\"http://a.m.taobao.com/i529666038203.htm\",\"eurl\":\"http://click.mz.simba.taobao.com/ecpm?e=FKzStLpktUcmgME64bmjnBsQmLP5zomMI9WwdvViswDtdMUS1TLPryFiqQmsaUcblU3hrUulblXi4Nf5jVnFI3mESrWAJFi8UK7RDtIZydUyXElRAMLwo3HZWQvTKXBpyitB%2BgALy7j45JkIPnsiapEFjIWbdXJAnae9i5WIlhTnQ%2FthEaQ9IuT5J4gzB5T%2FcKP7YijzmvIZWnX1fL8Wv2yOkjnv1RfOuAwHNITyYhs0036Nbzw1rue9DcuU1VaInAsdAQs%2BcFbs41NPY6%2FbqjqRHfjhCyty&u=http%3A%2F%2Fa.m.taobao.com%2Fi529666038203.htm&k=289\",\"tbgoodslink\":\"http://i.mmcdn.cn/simba/img/TB120WTMpXXXXazXXXXSutbFXXX.jpg\",\"tmpl\":\"\"}";
        String text = JSON.toJSONString(vo);
        VO vo1 = JSON.parseObject(text, VO.class);
        Assert.assertEquals(vo1.value, vo.value);

Reported by PMD.

Found non-transient, non-static member. Please mark as transient or provide accessors.
Error

Line: 27 

                  }
    
    public static class VO {
        public String value;
    }
}

Reported by PMD.

src/test/java/com/alibaba/json/bvt/parser/taobao/LongObjectAsStringTest.java
3 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 10 

              import junit.framework.TestCase;

public class LongObjectAsStringTest extends TestCase {
    public void test_0 () throws Exception {
        VO vo = JSON.parseObject("{\"value\":\"1001\"}", VO.class);
        Assert.assertEquals(1001, vo.value.intValue());
    }
    
    public static class VO {

Reported by PMD.

Potential violation of Law of Demeter (static property access)
Design

Line: 12 

              public class LongObjectAsStringTest extends TestCase {
    public void test_0 () throws Exception {
        VO vo = JSON.parseObject("{\"value\":\"1001\"}", VO.class);
        Assert.assertEquals(1001, vo.value.intValue());
    }
    
    public static class VO {
        public Long value;
    }

Reported by PMD.

Found non-transient, non-static member. Please mark as transient or provide accessors.
Error

Line: 16 

                  }
    
    public static class VO {
        public Long value;
    }
}

Reported by PMD.

src/test/java/com/alibaba/json/bvt/serializer/IntFieldTest.java
3 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 11 

              
public class IntFieldTest extends TestCase {

    public void test_model() throws Exception {
        Model model = new Model();
        model.id = -1001;
        
        String text = JSON.toJSONString(model);
        Assert.assertEquals("{\"id\":-1001}", text);

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 19 

                      Assert.assertEquals("{\"id\":-1001}", text);
    }
    
    public void test_model_max() throws Exception {
        Model model = new Model();
        model.id = Integer.MIN_VALUE;
        
        String text = JSON.toJSONString(model);
        Assert.assertEquals("{\"id\":-2147483648}", text);

Reported by PMD.

Found non-transient, non-static member. Please mark as transient or provide accessors.
Error

Line: 29 

              
    public static class Model {

        public int id;
    }
}

Reported by PMD.

src/test/java/com/alibaba/json/bvt/serializer/enum_/EnumFieldsTest2.java
3 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 12 

              
public class EnumFieldsTest2 extends TestCase {

    public void test_enum() throws Exception {
        Model model = new Model();
        model.t1 = Type.A;
        model.t2 = null;

        String text = JSON.toJSONString(model, SerializerFeature.WriteMapNullValue);

Reported by PMD.

Assigning an Object to null is a code smell. Consider refactoring.
Error

Line: 15 

                  public void test_enum() throws Exception {
        Model model = new Model();
        model.t1 = Type.A;
        model.t2 = null;

        String text = JSON.toJSONString(model, SerializerFeature.WriteMapNullValue);
        Assert.assertEquals("{\"t1\":\"A\",\"t2\":null}", text);
    }

Reported by PMD.

The class 'Model' is suspected to be a Data Class (WOC=0.000%, NOPA=0, NOAM=4, WMC=4)
Design

Line: 21 

                      Assert.assertEquals("{\"t1\":\"A\",\"t2\":null}", text);
    }

    public static class Model {

        private Type t1;
        private Type t2;

        public Type getT1() {

Reported by PMD.

src/test/java/com/alibaba/json/bvt/serializer/MaxBufSizeTest.java
3 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 11 

               * Created by wenshao on 01/04/2017.
 */
public class MaxBufSizeTest extends TestCase {
    public void test_max_buf() throws Exception {
        SerializeWriter writer = new SerializeWriter();

        Throwable error = null;
        try {
            writer.setMaxBufSize(1);

Reported by PMD.

JUnit assertions should include a message
Design

Line: 20 

                      } catch (JSONException e) {
            error = e;
        }
        assertNotNull(error);
    }
}

Reported by PMD.

Found 'DD'-anomaly for variable 'error' (lines '14'-'18').
Error

Line: 14 

                  public void test_max_buf() throws Exception {
        SerializeWriter writer = new SerializeWriter();

        Throwable error = null;
        try {
            writer.setMaxBufSize(1);
        } catch (JSONException e) {
            error = e;
        }

Reported by PMD.

src/test/java/com/alibaba/json/bvt/path/JSONPath_containsValue_2.java
3 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 10 

              import junit.framework.TestCase;

public class JSONPath_containsValue_2 extends TestCase {
    public void test_root() throws Exception {
        Model model = new Model();
        model.value = 1001;
        
        Assert.assertTrue(JSONPath.containsValue(model, "/value", 1001));
        Assert.assertTrue(JSONPath.containsValue(model, "/value", 1001L));

Reported by PMD.

The String literal '/value' appears 10 times in this file; the first occurrence is on line 14
Error

Line: 14 

                      Model model = new Model();
        model.value = 1001;
        
        Assert.assertTrue(JSONPath.containsValue(model, "/value", 1001));
        Assert.assertTrue(JSONPath.containsValue(model, "/value", 1001L));
        Assert.assertTrue(JSONPath.containsValue(model, "/value", (short) 1001));
        Assert.assertTrue(JSONPath.containsValue(model, "/value", 1001F));
        Assert.assertTrue(JSONPath.containsValue(model, "/value", 1001D));

Reported by PMD.

Found non-transient, non-static member. Please mark as transient or provide accessors.
Error

Line: 28 

                  }
    
    public static class Model {
        public int value;
    }
}

Reported by PMD.