BAEL-4505 (#10119)

* initial commit

* fixed formatting

* formatting changes

* test fix

persistence-modules/spring-boot-persistence-h2/src/main/resources/application-persistent-on.properties

@@ -0,0 +1,10 @@
+#spring.datasource.url=jdbc:h2:file:C:/data/demodb
+#spring.datasource.url=jdbc:h2:file:~/demodb
+spring.datasource.url=jdbc:h2:file:./src/main/resources/db/demodb
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=
+spring.h2.console.enabled=true
+spring.jpa.hibernate.ddl-auto=create-drop
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+spring.h2.console.path=/h2-console

persistence-modules/spring-boot-persistence-h2/src/test/java/com/baeldung/persistent/FilesLocationUnitTest.java

@@ -0,0 +1,52 @@
+package com.baeldung.persistent;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.annotation.DirtiesContext.ClassMode;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.h2db.auto.configuration.AutoConfigurationDemo;
+
+@ActiveProfiles("persistent-on")
+@RunWith(SpringRunner.class)
+@DirtiesContext(classMode = ClassMode.BEFORE_EACH_TEST_METHOD)
+@SpringBootTest(classes = AutoConfigurationDemo.class)
+public class FilesLocationUnitTest {
+
+    @BeforeClass
+    public static void beforeClass() {
+
+    }
+
+    @Test(expected = Test.None.class)
+    public void whenApplicationStarted_thenEmbeddedDbSubfolderCreated() {
+        File subdirectory = new File("src/main/resources/db");
+        System.out.println(subdirectory.getAbsolutePath());
+        assertTrue(subdirectory.exists());
+        assertTrue(subdirectory.isDirectory());
+    }
+
+    @Test(expected = Test.None.class)
+    public void whenApplicationStarted_thenEmbeddedDbFilesCreated() {
+        File dbFile = new File("src/main/resources/db/demodb.mv.db");
+        System.out.println(dbFile.getAbsolutePath());
+
+        assertTrue(dbFile.exists());
+        assertTrue(dbFile.isFile());
+    }
+
+    @AfterClass
+    public static void cleanUp() {
+        File dbFile = new File("src/main/resources/db/demodb.mv.db");
+        dbFile.deleteOnExit();
+    }
+}