Include the environment default profiles in the env endpoint's response

See gh-39257

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/documentation/EnvironmentEndpointDocumentationTests.java

@@ -64,6 +64,9 @@ class EnvironmentEndpointDocumentationTests extends MockMvcEndpointDocumentation
 	private static final FieldDescriptor activeProfiles = fieldWithPath("activeProfiles")
 		.description("Names of the active profiles, if any.");
 
+	private static final FieldDescriptor defaultProfiles = fieldWithPath("defaultProfiles")
+		.description("Names of the default profiles, if any.");
+
 	private static final FieldDescriptor propertySources = fieldWithPath("propertySources")
 		.description("Property sources in order of precedence.");
 
@@ -79,7 +82,7 @@ class EnvironmentEndpointDocumentationTests extends MockMvcEndpointDocumentation
 							replacePattern(Pattern.compile(
 									"org/springframework/boot/actuate/autoconfigure/endpoint/web/documentation/"), ""),
 							filterProperties()),
-					responseFields(activeProfiles, propertySources, propertySourceName,
+					responseFields(activeProfiles, defaultProfiles, propertySources, propertySourceName,
 							fieldWithPath("propertySources.[].properties")
 								.description("Properties in the property source keyed by property name."),
 							fieldWithPath("propertySources.[].properties.*.value")
@@ -101,7 +104,7 @@ class EnvironmentEndpointDocumentationTests extends MockMvcEndpointDocumentation
 								.optional(),
 							fieldWithPath("property.source").description("Name of the source of the property."),
 							fieldWithPath("property.value").description("Value of the property."), activeProfiles,
-							propertySources, propertySourceName,
+							defaultProfiles, propertySources, propertySourceName,
 							fieldWithPath("propertySources.[].property")
 								.description("Property in the property source, if any.")
 								.optional(),

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/env/EnvironmentEndpoint.java

@@ -101,7 +101,8 @@ public class EnvironmentEndpoint {
 						propertyNamePredicate, showUnsanitized));
 			}
 		});
-		return new EnvironmentDescriptor(Arrays.asList(this.environment.getActiveProfiles()), propertySources);
+		return new EnvironmentDescriptor(Arrays.asList(this.environment.getActiveProfiles()),
+				Arrays.asList(this.environment.getDefaultProfiles()), propertySources);
 	}
 
 	@ReadOperation
@@ -114,7 +115,7 @@ public class EnvironmentEndpoint {
 		Map<String, PropertyValueDescriptor> descriptors = getPropertySourceDescriptors(propertyName, showUnsanitized);
 		PropertySummaryDescriptor summary = getPropertySummaryDescriptor(descriptors);
 		return new EnvironmentEntryDescriptor(summary, Arrays.asList(this.environment.getActiveProfiles()),
-				toPropertySourceDescriptors(descriptors));
+				Arrays.asList(this.environment.getDefaultProfiles()), toPropertySourceDescriptors(descriptors));
 	}
 
 	private List<PropertySourceEntryDescriptor> toPropertySourceDescriptors(
@@ -209,10 +210,14 @@ public class EnvironmentEndpoint {
 
 		private final List<String> activeProfiles;
 
+		private final List<String> defaultProfiles;
+
 		private final List<PropertySourceDescriptor> propertySources;
 
-		private EnvironmentDescriptor(List<String> activeProfiles, List<PropertySourceDescriptor> propertySources) {
+		private EnvironmentDescriptor(List<String> activeProfiles, List<String> defaultProfiles,
+				List<PropertySourceDescriptor> propertySources) {
 			this.activeProfiles = activeProfiles;
+			this.defaultProfiles = defaultProfiles;
 			this.propertySources = propertySources;
 		}
 
@@ -220,6 +225,10 @@ public class EnvironmentEndpoint {
 			return this.activeProfiles;
 		}
 
+		public List<String> getDefaultProfiles() {
+			return this.defaultProfiles;
+		}
+
 		public List<PropertySourceDescriptor> getPropertySources() {
 			return this.propertySources;
 		}
@@ -236,12 +245,15 @@ public class EnvironmentEndpoint {
 
 		private final List<String> activeProfiles;
 
+		private final List<String> defaultProfiles;
+
 		private final List<PropertySourceEntryDescriptor> propertySources;
 
 		EnvironmentEntryDescriptor(PropertySummaryDescriptor property, List<String> activeProfiles,
-				List<PropertySourceEntryDescriptor> propertySources) {
+				List<String> defaultProfiles, List<PropertySourceEntryDescriptor> propertySources) {
 			this.property = property;
 			this.activeProfiles = activeProfiles;
+			this.defaultProfiles = defaultProfiles;
 			this.propertySources = propertySources;
 		}
 
@@ -253,6 +265,10 @@ public class EnvironmentEndpoint {
 			return this.activeProfiles;
 		}
 
+		public List<String> getDefaultProfiles() {
+			return this.defaultProfiles;
+		}
+
 		public List<PropertySourceEntryDescriptor> getPropertySources() {
 			return this.propertySources;
 		}

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/env/EnvironmentEndpointWebExtensionTests.java

@@ -86,7 +86,8 @@ class EnvironmentEndpointWebExtensionTests {
 
 	private void verifyPrefixed(SecurityContext securityContext, boolean showUnsanitized) {
 		given(this.delegate.getEnvironmentEntryDescriptor("test", showUnsanitized))
-			.willReturn(new EnvironmentEntryDescriptor(null, Collections.emptyList(), Collections.emptyList()));
+			.willReturn(new EnvironmentEntryDescriptor(null, Collections.emptyList(), Collections.emptyList(),
+					Collections.emptyList()));
 		this.webExtension.environmentEntry(securityContext, "test");
 		then(this.delegate).should().getEnvironmentEntryDescriptor("test", showUnsanitized);
 	}