Honour spring.profiles.include even when .active has not been set

393cfe50 expanded the scope of spring.profiles.include so that it
could be used in any property source, and not just in a configuration
file. However, it did so in such a way that it would only take effect
when used outside of a configuration file if spring.profiles.active
was also set.

This commit updates ConfigFileApplicationListener so that included
profiles are activated when spring.profiles.active has not be set.

Closes gh-8244

spring-boot/src/main/java/org/springframework/boot/context/config/ConfigFileApplicationListener.java

@@ -388,7 +388,8 @@ public class ConfigFileApplicationListener implements EnvironmentPostProcessor,
 		}
 
 		private Set<Profile> initializeActiveProfiles() {
-			if (!this.environment.containsProperty(ACTIVE_PROFILES_PROPERTY)) {
+			if (!this.environment.containsProperty(ACTIVE_PROFILES_PROPERTY)
+					&& !this.environment.containsProperty(INCLUDE_PROFILES_PROPERTY)) {
 				return Collections.emptySet();
 			}
 			// Any pre-existing active profiles set via property sources (e.g. System

spring-boot/src/test/java/org/springframework/boot/context/config/ConfigFileApplicationListenerTests.java

@@ -851,6 +851,15 @@ public class ConfigFileApplicationListenerTests {
 				.isFalse();
 	}
 
+	@Test
+	public void profileCanBeIncludedWithoutAnyBeingActive() throws Exception {
+		SpringApplication application = new SpringApplication(Config.class);
+		application.setWebEnvironment(false);
+		this.context = application.run("--spring.profiles.include=dev");
+		String property = this.context.getEnvironment().getProperty("my.property");
+		assertThat(property).isEqualTo("fromdevpropertiesfile");
+	}
+
 	@Test
 	public void activeProfilesCanBeConfiguredUsingPlaceholdersResolvedAgainstTheEnvironment()
 			throws Exception {