Added additional scenario to reflect scenario mentioned in spring-feature-flags

(even though the article does not point to any module in the codebase)

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

@@ -11,6 +11,7 @@ app.name=MyApp
 app.description=${app.name} is a Spring Boot application
 logging.file.name=myapplication.log
 bael.property=defaultValue
+bael.otherProperty=defaultOtherValue
 #---
 spring.config.activate.on-profile=multidocument-dev
 spring.datasource.password=password
@@ -18,6 +19,9 @@ spring.datasource.url=jdbc:h2:dev
 spring.datasource.username=SA
 bael.property=devValue
 #---
+spring.config.activate.on-profile=multidocument-integration-extension
+bael.otherProperty=integrationExtensionOtherValue
+#---
 spring.config.activate.on-profile=multidocument-prod
 spring.datasource.password=password
 spring.datasource.url=jdbc:h2:prod

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

@@ -2,6 +2,9 @@ bael:
   root-level-property: defaultRootLevelValue
 ---
 spring:
+  profiles:
+    group:
+      multidocument-integration: multidocument-integration-extension
   config:
     activate:
       on-profile: multidocument-staging

spring-boot-modules/spring-boot-properties-3/src/test/java/com/baeldung/boot/properties/multidocument/IntegrationMultidocumentFilesIntegrationTest.java

@@ -17,12 +17,16 @@ public class IntegrationMultidocumentFilesIntegrationTest {
     @Value("${bael.property}")
     private String baelCustomProperty;
     
+    @Value("${bael.otherProperty}")
+    private String baelCustomOtherProperty;
+    
     @Value("${bael.root-level-property}")
     private String baelRootProperty;
 
     @Test
     public void givenProductionProfileActive_whenApplicationStarts_thenDefaultPropertiesUser() {
         assertThat(baelCustomProperty).isEqualTo("integrationValue");
+        assertThat(baelCustomOtherProperty).isEqualTo("integrationExtensionOtherValue");
         assertThat(baelRootProperty).isEqualTo("defaultRootLevelValue");
     }
 }