bael-2190 - JPA many-to-many: adding tests and changing package

persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/model/Course.java

@@ -1,16 +1,20 @@
-package com.baeldung.manytomany.extracolumn.model;
+package com.baeldung.manytomany.model;
 
 import java.util.Set;
 
+import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Id;
 import javax.persistence.ManyToMany;
 import javax.persistence.OneToMany;
+import javax.persistence.Table;
 
 @Entity
+@Table(name = "course")
 public class Course {
 
     @Id
+    @Column(name = "id")
     private Long id;
 
     @ManyToMany(mappedBy = "likedCourses")

persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/model/CourseRating.java

@@ -1,12 +1,15 @@
-package com.baeldung.manytomany.extracolumn.model;
+package com.baeldung.manytomany.model;
 
+import javax.persistence.Column;
 import javax.persistence.EmbeddedId;
 import javax.persistence.Entity;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
 import javax.persistence.MapsId;
+import javax.persistence.Table;
 
 @Entity
+@Table(name = "course_rating")
 public class CourseRating {
 
     @EmbeddedId
@@ -22,6 +25,7 @@ public class CourseRating {
     @JoinColumn(name = "course_id")
     private Course course;
 
+    @Column(name = "rating")
     private int rating;
 
     public CourseRating() {

persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/model/CourseRatingKey.java

@@ -1,4 +1,4 @@
-package com.baeldung.manytomany.extracolumn.model;
+package com.baeldung.manytomany.model;
 
 import java.io.Serializable;
 

persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/model/CourseRegistration.java

@@ -1,16 +1,20 @@
-package com.baeldung.manytomany.extracolumn.model;
+package com.baeldung.manytomany.model;
 
 import java.time.LocalDateTime;
 
+import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
+import javax.persistence.Table;
 
 @Entity
+@Table(name = "course_registration")
 public class CourseRegistration {
 
     @Id
+    @Column(name = "id")
     private Long id;
 
     @ManyToOne
@@ -21,8 +25,10 @@ public class CourseRegistration {
     @JoinColumn(name = "course_id")
     private Course course;
 
+    @Column(name = "registered_at")
     private LocalDateTime registeredAt;
 
+    @Column(name = "grade")
     private int grade;
 
     // additional properties

persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/model/Student.java

@@ -1,18 +1,22 @@
-package com.baeldung.manytomany.extracolumn.model;
+package com.baeldung.manytomany.model;
 
 import java.util.Set;
 
+import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.JoinTable;
 import javax.persistence.ManyToMany;
 import javax.persistence.OneToMany;
+import javax.persistence.Table;
 
 @Entity
+@Table(name = "student")
 public class Student {
 
     @Id
+    @Column(name = "id")
     private Long id;
 
     @ManyToMany

persistence-modules/spring-jpa/src/test/java/com/baeldung/manytomany/ManyToManyIntegrationTest.java

@@ -0,0 +1,24 @@
+package com.baeldung.manytomany;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = ManyToManyTestConfiguration.class)
+@DirtiesContext
+public class ManyToManyIntegrationTest {
+
+    @PersistenceContext
+    EntityManager entityManager;
+
+    @Test
+    public void contextStarted() {
+    }
+
+}

persistence-modules/spring-jpa/src/test/java/com/baeldung/manytomany/ManyToManyTestConfiguration.java

@@ -0,0 +1,51 @@
+package com.baeldung.manytomany;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.sql.DataSource;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
+import org.springframework.orm.jpa.JpaVendorAdapter;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+
+@Configuration
+@PropertySource("classpath:/manytomany/test.properties")
+public class ManyToManyTestConfiguration {
+
+    @Bean
+    public DataSource dataSource() {
+        EmbeddedDatabaseBuilder dbBuilder = new EmbeddedDatabaseBuilder();
+        return dbBuilder.setType(EmbeddedDatabaseType.H2)
+            .addScript("classpath:/manytomany/db.sql")
+            .build();
+    }
+
+    @Bean
+    public LocalContainerEntityManagerFactoryBean entityManagerFactory(@Value("${hibernate.hbm2ddl.auto}") String hbm2ddlType, @Value("${hibernate.dialect}") String dialect, @Value("${hibernate.show_sql}") boolean showSql) {
+        LocalContainerEntityManagerFactoryBean result = new LocalContainerEntityManagerFactoryBean();
+
+        result.setDataSource(dataSource());
+        result.setPackagesToScan("com.baeldung.manytomany.model");
+        result.setJpaVendorAdapter(jpaVendorAdapter());
+
+        Map<String, Object> jpaProperties = new HashMap<>();
+        jpaProperties.put("hibernate.hbm2ddl.auto", hbm2ddlType);
+        jpaProperties.put("hibernate.dialect", dialect);
+        jpaProperties.put("hibernate.show_sql", showSql);
+        result.setJpaPropertyMap(jpaProperties);
+
+        return result;
+    }
+
+    public JpaVendorAdapter jpaVendorAdapter() {
+        return new HibernateJpaVendorAdapter();
+    }
+
+}

persistence-modules/spring-jpa/src/test/resources/manytomany/db.sql

@@ -0,0 +1,44 @@
+CREATE TABLE course (
+  id bigint(20) NOT NULL,
+  PRIMARY KEY (id)
+);
+
+
+CREATE TABLE student (
+  id bigint(20) NOT NULL,
+  PRIMARY KEY (id)
+);
+
+
+CREATE TABLE course_like (
+  student_id bigint(20) NOT NULL,
+  course_id bigint(20) NOT NULL,
+  PRIMARY KEY (student_id, course_id),
+  CONSTRAINT fk_course_like__student FOREIGN KEY (student_id) REFERENCES student (id),
+  CONSTRAINT fk_course_like__course FOREIGN KEY (course_id) REFERENCES course (id)
+);
+
+
+
+CREATE TABLE course_rating (
+  course_id bigint(20) NOT NULL,
+  student_id bigint(20) NOT NULL,
+  rating int(11) NOT NULL,
+  PRIMARY KEY (course_id, student_id),
+  CONSTRAINT fk_course_rating__student FOREIGN KEY (student_id) REFERENCES student (id),
+  CONSTRAINT fk_course_rating__course FOREIGN KEY (course_id) REFERENCES course (id)
+);
+
+
+
+CREATE TABLE course_registration (
+  id bigint(20) NOT NULL,
+  grade int(11),
+  registered_at datetime NOT NULL,
+  course_id bigint(20) NOT NULL,
+  student_id bigint(20) NOT NULL,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_course_registration__student FOREIGN KEY (student_id) REFERENCES student (id),
+  CONSTRAINT fk_course_registration__course FOREIGN KEY (course_id) REFERENCES course (id)
+);
+

persistence-modules/spring-jpa/src/test/resources/manytomany/test.properties

@@ -0,0 +1,6 @@
+jdbc.driverClassName=org.h2.Driver
+jdbc.url=jdbc:h2:mem:myDb;DB_CLOSE_DELAY=-1
+
+hibernate.dialect=org.hibernate.dialect.H2Dialect
+hibernate.show_sql=true
+hibernate.hbm2ddl.auto=validate