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ManyToManyBidirectionalTests.java
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ManyToManyBidirectionalTests.java
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/**
*
*/
package com.jjc;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.transaction.Transactional;
import org.junit.jupiter.api.Order;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import com.jjc.entity.Course;
import com.jjc.entity.Student;
import com.jjc.entity.Teacher;
/**
* @author jjc
* 双向关联
*/
@Transactional
@SpringBootTest
public class ManyToManyBidirectionalTests {
@PersistenceContext
private EntityManager entityManager;
/*
* @Order(1)
*
* @Test
*/
public void test1() {
Teacher teacher1 = new Teacher("teacher1");
Teacher teacher2 = new Teacher( "teacher2");
Course course1 = new Course("course1");
Course course2 = new Course("course2");
teacher1.addCourse(course1);
teacher1.addCourse(course2);
teacher2.addCourse(course2);
entityManager.persist(teacher1);
entityManager.persist(teacher2);
entityManager.flush();
teacher1.removeCourse(course1);
entityManager.flush();
}
/*
* @Order(2)
*
* @Test
*/
public void test2() {
Teacher teacher1 = new Teacher("teacher1");
Teacher teacher2 = new Teacher( "teacher2");
Course course1 = new Course("course1");
Course course2 = new Course("course2");
course1.addTeacher(teacher1);
course1.addTeacher(teacher2);
course2.addTeacher(teacher2);
entityManager.persist(course1);
entityManager.persist(course2);
entityManager.flush();
course1.removeTeacher(teacher1);
entityManager.flush();
}
@Order(3)
@Test
public void test3() {
Student student1 = new Student("student1");
Student student2 = new Student("student2");
Course course1 = new Course("course1");
Course course2 = new Course("course2");
entityManager.persist(student1);
entityManager.persist(student2);
entityManager.persist(course1);
entityManager.persist(course2);
student1.addCourse(course1);
student1.addCourse(course2);
student2.addCourse(course1);
entityManager.flush();
student1.removeCourse(course1);
entityManager.flush();
}
}