Completed task 2

Author: jabrena

examples/spring-boot-demo/implementation/README-DEV.md

@@ -17,7 +17,7 @@
 ./mvnw clean package
 
 # Run integration tests
-./mvnw verify
+./mvnw clean verify
 
 # Check for dependency updates
 ./mvnw versions:display-property-updates

examples/spring-boot-demo/implementation/src/test/java/com/example/demo/DemoApplicationTests.java

@@ -1,13 +1,33 @@
 package com.example.demo;
 
+import org.springframework.test.context.DynamicPropertyRegistry;
+import org.springframework.test.context.DynamicPropertySource;
+import org.testcontainers.containers.PostgreSQLContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.ActiveProfiles;
 
 @SpringBootTest
+@Testcontainers
 @ActiveProfiles("test")
 class DemoApplicationTests {
 
+    @Container
+    static PostgreSQLContainer<?> postgres = new PostgreSQLContainer<>("postgres:15")
+            .withDatabaseName("sakila")
+            .withUsername("sakila")
+            .withPassword("sakila");
+            // Note: Database schema and init script will be added in subsequent tasks (2.2, 2.9)
+
+    @DynamicPropertySource
+    static void configureProperties(DynamicPropertyRegistry registry) {
+        registry.add("spring.datasource.url", postgres::getJdbcUrl);
+        registry.add("spring.datasource.username", postgres::getUsername);
+        registry.add("spring.datasource.password", postgres::getPassword);
+    }
+
 	@Test
 	void contextLoads() {
 		// This test will load the Spring context without requiring database connection