Four levels of testing- fixed

Jenkinsfile

 pipeline {
-    agent any // Or your specific agent label
+    agent {
+        docker {
+            image 'your-java-image'
+        }
+    }
+    
+    services {
+        // Run MariaDB as a service container
+        docker {
+            image 'mariadb:10.11'
+            args '-e MYSQL_ROOT_PASSWORD=comsc -e MYSQL_DATABASE=healthcare_test'
+        }
+    }
     
     // Define reusable environment variables.
     environment {
@@ -78,6 +90,12 @@ pipeline {
             }
         }
 
+        stage('Test') {
+            steps {
+                sh './gradlew test --exclude "**/mapper/**"'
+            }
+        }
+
         stage('Optional UI Tests') {
             steps {
                 // Run Selenium UI tests. If not configured (or if they fail), the || true ensures the build continues.

src/test/java/com/cardiff/client_project/resources/application-ci.yml

+spring:
+  datasource:
+    url: jdbc:h2:mem:testdb;MODE=MySQL
+    username: sa
+    password: 
+    driver-class-name: org.h2.Driver
+  jpa:
+    hibernate:
+      ddl-auto: create-drop
+    database-platform: org.hibernate.dialect.H2Dialect
+  sql:
+    init:
+      mode: always
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