[BAEL-4635] Tests for JPA Transient Annotation tutorial

2020-10-27 21:59:40 -04:00
parent 32ae02a1d0
commit 400cbb845d
5 changed files with 246 additions and 1 deletions
@@ -0,0 +1,79 @@
+package com.baeldung.ignorable.fields;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+import java.io.*;
+import java.util.List;
+import java.util.Random;
+
+import org.junit.Test;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.MapperFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.hibernate5.Hibernate5Module;
+
+public class TransientFieldTest {
+
+    private final UserDao userDao = new UserDao();
+
+    private final int randInt = new Random().nextInt();
+
+    private final User user = new User("user" + randInt + "@bar.com", "hunter2", "MacOSX");
+
+    @Test
+    public void JPA_UserWithTransientAnnotation_FieldNotPersisted() {
+        userDao.saveUser(user);
+        List<User> allUsers = userDao.getUsers();
+        User savedUser = allUsers.get(allUsers.indexOf(user));
+
+        assertNull(savedUser.getCurrentDevice());
+    }
+
+    @Test
+    public void JavaSerialization_UserWithTransientAnnotation_FieldSerialized() throws IOException, ClassNotFoundException {
+
+        FileOutputStream fout = new FileOutputStream("test.obj");
+        ObjectOutputStream out = new ObjectOutputStream(fout);
+        out.writeObject(user);
+        out.flush();
+        out.close();
+
+        FileInputStream fin = new FileInputStream("test.obj");
+        ObjectInputStream in = new ObjectInputStream(fin);
+        User savedUser = (User) in.readObject();
+        in.close();
+
+        assertEquals(user.getCurrentDevice(), savedUser.getCurrentDevice());
+    }
+
+    @Test
+    public void JSONSerialization_UserWithTransientAnnotation_FieldSerialized() throws JsonProcessingException {
+        ObjectMapper objectMapper = new ObjectMapper();
+        String json = objectMapper.writeValueAsString(user);
+        User savedUser = objectMapper.readValue(json, User.class);
+
+        assertEquals(user.getCurrentDevice(), savedUser.getCurrentDevice());
+    }
+
+    @Test
+    public void JSONSerialization_JacksonUsingHibernate5Module_FieldNotSerialized() throws JsonProcessingException {
+        ObjectMapper objectMapper = new ObjectMapper();
+        objectMapper.registerModule(new Hibernate5Module());
+        String json = objectMapper.writeValueAsString(user);
+        User savedUser = objectMapper.readValue(json, User.class);
+
+        assertNull(savedUser.getCurrentDevice());
+    }
+
+    @Test
+    public void JSONSerialization_MapperPropagatesTransientMarker_FieldSerialized() throws JsonProcessingException {
+        ObjectMapper objectMapper = new ObjectMapper();
+        objectMapper.configure(MapperFeature.PROPAGATE_TRANSIENT_MARKER, true);
+        String json = objectMapper.writeValueAsString(user);
+        User savedUser = objectMapper.readValue(json, User.class);
+
+        assertEquals(user.getCurrentDevice(), savedUser.getCurrentDevice());
+    }
+}