Use MariaDB in tests instead of HSQLDB

Utilizes Testcontainers to start a MariaDB Docker container to use in tests. The empty database is then migrated using Flyway which means migrations are implicitly tested as well.

core/pom.xml

@@ -86,8 +86,23 @@
             <scope>test</scope>
         </dependency>
         <dependency>
-            <groupId>org.hsqldb</groupId>
+            <groupId>org.testcontainers</groupId>
-            <artifactId>hsqldb</artifactId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.testcontainers</groupId>
+            <artifactId>mariadb</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mariadb.jdbc</groupId>
+            <artifactId>mariadb-java-client</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.flywaydb</groupId>
+            <artifactId>flyway-mysql</artifactId>
             <scope>test</scope>
         </dependency>
 

core/src/main/resources/META-INF/persistence.xml

@@ -4,9 +4,6 @@
              xsi:schemaLocation="https://jakarta.ee/xml/ns/persistence https://jakarta.ee/xml/ns/persistence/persistence_3_0.xsd"
              version="3.0">
 
-    <!-- NOTE THAT THERE ARE TWO PERSISTENCE UNITS, one default and one test
-            used for either running or unit-tests -->
-
     <!-- A JPA Persistence Unit -->
     <persistence-unit name="defaultPersistenceUnit"
                       transaction-type="RESOURCE_LOCAL">
@@ -17,13 +14,4 @@
         </properties>
     </persistence-unit>
 
-    <!-- A JPA Persistence Unit used for tests -->
-    <persistence-unit name="testPersistenceUnit"
-                      transaction-type="RESOURCE_LOCAL">
-        <properties>
-            <property name="jakarta.persistence.jdbc.driver" value="org.hsqldb.jdbc.JDBCDriver"/>
-            <property name="jakarta.persistence.jdbc.url" value="jdbc:hsqldb:mem:test"/>
-            <property name="hibernate.hbm2ddl.auto" value="create"/>
-        </properties>
-    </persistence-unit>
 </persistence>

core/src/test/java/se/su/dsv/scipro/test/SpringTest.java

@@ -4,28 +4,47 @@ import jakarta.persistence.EntityManager;
 import jakarta.persistence.EntityManagerFactory;
 import jakarta.persistence.EntityTransaction;
 import jakarta.persistence.Persistence;
+import java.sql.SQLException;
 import java.time.Clock;
+import java.util.Map;
 import java.util.Optional;
+import org.flywaydb.core.Flyway;
+import org.hibernate.cfg.Environment;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
+import org.mariadb.jdbc.MariaDbDataSource;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
+import org.testcontainers.containers.MariaDBContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
 import se.su.dsv.scipro.CoreConfig;
 import se.su.dsv.scipro.RepositoryConfiguration;
 import se.su.dsv.scipro.profiles.CurrentProfile;
 import se.su.dsv.scipro.sukat.Sukat;
 import se.su.dsv.scipro.system.CurrentUser;
 
+@Testcontainers
 public abstract class SpringTest {
 
     private EntityManager entityManager;
     private EntityManagerFactory entityManagerFactory;
 
+    @Container
+    static MariaDBContainer<?> mariaDBContainer = new MariaDBContainer<>("mariadb:10.11");
+
     @BeforeEach
-    public final void prepareSpring() {
+    public final void prepareSpring() throws SQLException {
-        entityManagerFactory = Persistence.createEntityManagerFactory("testPersistenceUnit");
+        MariaDbDataSource dataSource = new MariaDbDataSource(mariaDBContainer.getJdbcUrl());
+        dataSource.setUser(mariaDBContainer.getUsername());
+        dataSource.setPassword(mariaDBContainer.getPassword());
+
+        Flyway.configure().dataSource(dataSource).load().migrate();
+
+        Map<String, Object> jpaProperties = Map.of(Environment.JAKARTA_JTA_DATASOURCE, dataSource);
+        entityManagerFactory = Persistence.createEntityManagerFactory("defaultPersistenceUnit", jpaProperties);
         this.entityManager = entityManagerFactory.createEntityManager();
         EntityTransaction transaction = entityManager.getTransaction();
         transaction.begin();

pom.xml

@@ -34,7 +34,6 @@
         <querydsl.version>5.0.0</querydsl.version>
         <jakarta.servlet.version>5.0.0</jakarta.servlet.version>
         <junit.version>5.9.3</junit.version>
-        <hsqldb.version>2.7.1</hsqldb.version>
         <mockito.version>5.3.1</mockito.version>
         <flyway.version>9.19.1</flyway.version>
         <jersey.version>3.1.6</jersey.version>
@@ -133,14 +132,6 @@
                 <scope>import</scope>
             </dependency>
 
-            <!-- Database stuff -->
-            <dependency>
-                <groupId>org.hsqldb</groupId>
-                <artifactId>hsqldb</artifactId>
-                <version>${hsqldb.version}</version>
-                <scope>test</scope>
-            </dependency>
-
             <dependency>
                 <groupId>org.mariadb.jdbc</groupId>
                 <artifactId>mariadb-java-client</artifactId>