Polish "Fix configuration properties output for actuator"

Closes gh-9052

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/ConfigurationPropertiesReportEndpoint.java

@@ -17,13 +17,13 @@
 package org.springframework.boot.actuate.endpoint;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
 import com.fasterxml.jackson.databind.BeanDescription;
-import com.fasterxml.jackson.databind.JavaType;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationConfig;
 import com.fasterxml.jackson.databind.SerializationFeature;
@@ -58,6 +58,7 @@ import org.springframework.util.StringUtils;
  *
  * @author Christian Dupuis
  * @author Dave Syer
+ * @author Stephane Nicoll
  */
 @ConfigurationProperties(prefix = "endpoints.configprops")
 public class ConfigurationPropertiesReportEndpoint
@@ -330,17 +331,18 @@ public class ConfigurationPropertiesReportEndpoint
 
 		private boolean isReadable(BeanDescription beanDesc, BeanPropertyWriter writer) {
 			Class<?> parentType = beanDesc.getType().getRawClass();
-			JavaType type = writer.getType();
+			Class<?> type = writer.getType().getRawClass();
 			AnnotatedMethod setter = findSetter(beanDesc, writer);
 			// If there's a setter, we assume it's OK to report on the value,
 			// similarly, if there's no setter but the package names match, we assume
 			// that its a nested class used solely for binding to config props, so it
-			// should be kosher. This filter is not used if there is JSON metadata for
-			// the property, so it's mainly for user-defined beans.
+			// should be kosher. Lists and Maps are also auto-detected by default since
+			// that's what the metadata generator does. This filter is not used if there
+			// is JSON metadata for the property, so it's mainly for user-defined beans.
 			return (setter != null)
-					|| ClassUtils.getPackageName(parentType).equals(ClassUtils.getPackageName(type.getRawClass()))
-					|| type.isMapLikeType()
-					|| type.isCollectionLikeType();
+					|| ClassUtils.getPackageName(parentType).equals(ClassUtils.getPackageName(type))
+					|| Map.class.isAssignableFrom(type)
+					|| Collection.class.isAssignableFrom(type);
 		}
 
 		private AnnotatedMethod findSetter(BeanDescription beanDesc,

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/ConfigurationPropertiesReportEndpointSerializationTests.java

@@ -35,11 +35,13 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.entry;
 
 /**
  * Tests for {@link ConfigurationPropertiesReportEndpoint} serialization.
  *
  * @author Dave Syer
+ * @author Stephane Nicoll
  */
 public class ConfigurationPropertiesReportEndpointSerializationTests {
 
@@ -199,36 +201,28 @@ public class ConfigurationPropertiesReportEndpointSerializationTests {
 
 	@Test
 	@SuppressWarnings("unchecked")
-	public void testOutputAllOnlyGetterProperties() throws Exception {
-		this.context.register(OnlyGetterPropertiesConfig.class);
+	public void testInitializedMapAndList() throws Exception {
+		this.context.register(InitializedMapAndListPropertiesConfig.class);
 		EnvironmentTestUtils.addEnvironment(this.context, "foo.map.entryOne:true",
 				"foo.list[0]:abc");
 		this.context.refresh();
 		ConfigurationPropertiesReportEndpoint report = this.context
 				.getBean(ConfigurationPropertiesReportEndpoint.class);
 		Map<String, Object> properties = report.invoke();
+		assertThat(properties).containsKeys("foo");
 		Map<String, Object> nestedProperties = (Map<String, Object>) properties
 				.get("foo");
-		assertThat(nestedProperties).isNotNull();
-		System.err.println(nestedProperties);
+		assertThat(nestedProperties).containsOnlyKeys("prefix", "properties");
 		assertThat(nestedProperties.get("prefix")).isEqualTo("foo");
 		Map<String, Object> propertiesMap = (Map<String, Object>) nestedProperties
 				.get("properties");
-		assertThat(propertiesMap).isNotNull();
-		assertThat(propertiesMap).hasSize(4);
-		String summary = (String) propertiesMap
-				.get("summary");
-		assertThat(summary).isNull();
+		assertThat(propertiesMap).containsOnlyKeys("bar", "name", "map", "list");
 		Map<String, Object> map = (Map<String, Object>) propertiesMap
 				.get("map");
-		assertThat(map).isNotNull();
-		assertThat(map).hasSize(1);
-		assertThat(map.get("entryOne")).isEqualTo(true);
+		assertThat(map).containsOnly(entry("entryOne", true));
 		List<String> list = (List<String>) propertiesMap
 				.get("list");
-		assertThat(list).isNotNull();
-		assertThat(list).hasSize(1);
-		assertThat(list.get(0)).isEqualTo("abc");
+		assertThat(list).containsExactly("abc");
 	}
 
 	@Configuration
@@ -328,12 +322,14 @@ public class ConfigurationPropertiesReportEndpointSerializationTests {
 
 	@Configuration
 	@Import(Base.class)
-	public static class OnlyGetterPropertiesConfig {
+	public static class InitializedMapAndListPropertiesConfig {
+
 		@Bean
 		@ConfigurationProperties(prefix = "foo")
-		public OnlyGetterProperties foo() {
-			return new OnlyGetterProperties();
+		public InitializedMapAndListProperties foo() {
+			return new InitializedMapAndListProperties();
 		}
+
 	}
 
 	public static class Foo {
@@ -439,9 +435,11 @@ public class ConfigurationPropertiesReportEndpointSerializationTests {
 
 	}
 
-	public static class OnlyGetterProperties extends Foo {
-		private Map<String, Boolean> map = new HashMap<>();
-		private List<String> list = new ArrayList<>();
+	public static class InitializedMapAndListProperties extends Foo {
+
+		private Map<String, Boolean> map = new HashMap<String, Boolean>();
+
+		private List<String> list = new ArrayList<String>();
 
 		public Map<String, Boolean> getMap() {
 			return this.map;
@@ -450,6 +448,7 @@ public class ConfigurationPropertiesReportEndpointSerializationTests {
 		public List<String> getList() {
 			return this.list;
 		}
+
 	}
 
 }