Bael 5543 - Running a spring boot app without DB (#12339)

* BAEL-5543 - Running a spring boot app without db

* BAEL-5543 - Adding authentication properties

* BAEL-5543 - Moving to a new module

* BAEL-5543 - Changing test class name

* BAEL-5543 - Reducing Java version

Co-authored-by: Abhinav Pandey <[email protected]>

spring-boot-modules/spring-boot-data-3/src/main/java/com/baeldung/startwithoutdb/StartWithoutDbApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.startwithoutdb;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class StartWithoutDbApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(StartWithoutDbApplication.class, args);
+    }
+
+}

spring-boot-modules/spring-boot-data-3/src/main/resources/application.properties

@@ -0,0 +1,7 @@
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+spring.datasource.url=jdbc:mysql://localhost:3306/myDb
+spring.datasource.username=root
+spring.datasource.password=root
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
+spring.jpa.hibernate.ddl-auto=none
+spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults=false

spring-boot-modules/spring-boot-data-3/src/test/java/com/baeldung/startwithoutdb/StartWithoutDbIntegrationTest.java

@@ -0,0 +1,24 @@
+package com.baeldung.startwithoutdb;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import javax.sql.DataSource;
+
+@SpringBootTest(classes = StartWithoutDbApplication.class)
+class StartWithoutDbIntegrationTest {
+
+    @Autowired
+    private ApplicationContext context;
+
+    @Test
+    public void givenAutoConfigDisabled_whenStarting_thenNoAutoconfiguredBeansInContext() {
+        context.getBean(DataSource.class);
+    }
+
+
+}