Add extra test for placeholder behaviour

spring-boot/src/test/java/org/springframework/boot/context/initializer/ConfigFileApplicationContextInitializerTests.java

@@ -104,6 +104,14 @@ public class ConfigFileApplicationContextInitializerTests {
 		assertThat(property, equalTo("fromprofilepropertiesfile"));
 	}
 
+	@Test
+	public void profilePropertiesUsedInPlaceholders() throws Exception {
+		this.initializer.setNames("enableprofile");
+		this.initializer.initialize(this.context);
+		String property = this.context.getEnvironment().getProperty("one.more");
+		assertThat(property, equalTo("fromprofilepropertiesfile"));
+	}
+
 	@Test
 	public void yamlProfiles() throws Exception {
 		this.initializer.setNames("testprofiles");

spring-boot/src/test/resources/enableprofile.properties

 spring.profiles.active=myprofile
 my.property=frompropertiesfile
+one.more=${my.property}