Merge pull request #29896 from gcoppex

* pr/29896:
  Polish "Clarify log message with a profile containing a comma"
  Clarify log message with a profile containing a comma

Closes gh-29896

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/SpringApplication.java

@@ -27,6 +27,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Properties;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -666,19 +667,26 @@ public class SpringApplication {
 	protected void logStartupProfileInfo(ConfigurableApplicationContext context) {
 		Log log = getApplicationLog();
 		if (log.isInfoEnabled()) {
-			String[] activeProfiles = context.getEnvironment().getActiveProfiles();
+			List<String> activeProfiles = quoteProfiles(context.getEnvironment().getActiveProfiles());
 			if (ObjectUtils.isEmpty(activeProfiles)) {
-				String[] defaultProfiles = context.getEnvironment().getDefaultProfiles();
-				log.info("No active profile set, falling back to default profiles: "
-						+ StringUtils.arrayToCommaDelimitedString(defaultProfiles));
+				List<String> defaultProfiles = quoteProfiles(context.getEnvironment().getDefaultProfiles());
+				String message = String.format("%s default %s: ", defaultProfiles.size(),
+						(defaultProfiles.size() <= 1) ? "profile" : "profiles");
+				log.info("No active profile set, falling back to " + message
+						+ StringUtils.collectionToDelimitedString(defaultProfiles, ", "));
 			}
 			else {
-				log.info("The following profiles are active: "
-						+ StringUtils.arrayToCommaDelimitedString(activeProfiles));
+				String message = (activeProfiles.size() == 1) ? "1 profile is active: "
+						: activeProfiles.size() + " profiles are active: ";
+				log.info("The following " + message + StringUtils.collectionToDelimitedString(activeProfiles, ", "));
 			}
 		}
 	}
 
+	private List<String> quoteProfiles(String[] profiles) {
+		return Arrays.stream(profiles).map((profile) -> "\"" + profile + "\"").collect(Collectors.toList());
+	}
+
 	/**
 	 * Returns the {@link Log} for the application. By default will be deduced.
 	 * @return the application log

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/SpringApplicationTests.java

@@ -249,19 +249,40 @@ class SpringApplicationTests {
 	}
 
 	@Test
-	void logsNoActiveProfiles(CapturedOutput output) {
+	void logsActiveProfilesWithoutProfileAndSingleDefault(CapturedOutput output) {
 		SpringApplication application = new SpringApplication(ExampleConfig.class);
 		application.setWebApplicationType(WebApplicationType.NONE);
 		this.context = application.run();
-		assertThat(output).contains("No active profile set, falling back to default profiles: default");
+		assertThat(output).contains("No active profile set, falling back to 1 default profile: \"default\"");
 	}
 
 	@Test
-	void logsActiveProfiles(CapturedOutput output) {
+	void logsActiveProfilesWithoutProfileAndMultipleDefaults(CapturedOutput output) {
+		MockEnvironment environment = new MockEnvironment();
+		environment.setDefaultProfiles("p0,p1", "default");
+		SpringApplication application = new SpringApplication(ExampleConfig.class);
+		application.setWebApplicationType(WebApplicationType.NONE);
+		application.setEnvironment(environment);
+		this.context = application.run();
+		assertThat(output)
+				.contains("No active profile set, falling back to 2 default profiles: \"p0,p1\", \"default\"");
+	}
+
+	@Test
+	void logsActiveProfilesWithSingleProfile(CapturedOutput output) {
 		SpringApplication application = new SpringApplication(ExampleConfig.class);
 		application.setWebApplicationType(WebApplicationType.NONE);
 		this.context = application.run("--spring.profiles.active=myprofiles");
-		assertThat(output).contains("The following profiles are active: myprofile");
+		assertThat(output).contains("The following 1 profile is active: \"myprofiles\"");
+	}
+
+	@Test
+	void logsActiveProfilesWithMultipleProfiles(CapturedOutput output) {
+		SpringApplication application = new SpringApplication(ExampleConfig.class);
+		application.setWebApplicationType(WebApplicationType.NONE);
+		application.setAdditionalProfiles("p1,p2", "p3");
+		application.run();
+		assertThat(output).contains("The following 2 profiles are active: \"p1,p2\", \"p3\"");
 	}
 
 	@Test

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -815,8 +815,8 @@ class ConfigFileApplicationListenerTests {
 		assertThat(environment).has(matchingProfile("morespecific"));
 		assertThat(environment).has(matchingProfile("yetmorespecific"));
 		assertThat(environment).doesNotHave(matchingProfile("missing"));
-		assertThat(output)
-				.contains("The following profiles are active: includeprofile,specific,morespecific,yetmorespecific");
+		assertThat(output).contains(
+				"The following 4 profiles are active: \"includeprofile\", \"specific\", \"morespecific\", \"yetmorespecific\"");
 	}
 
 	@Test