Polish "Use Neo4jManagedTypes to populate the mapping context"

See gh-37574

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/neo4j/Neo4jDataAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -81,7 +81,6 @@ public class Neo4jDataAutoConfiguration {
 	@Bean
 	@ConditionalOnMissingBean
 	public Neo4jMappingContext neo4jMappingContext(Neo4jManagedTypes managedTypes, Neo4jConversions neo4jConversions) {
-
 		Neo4jMappingContext context = new Neo4jMappingContext(neo4jConversions);
 		context.setManagedTypes(managedTypes);
 		return context;

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/neo4j/Neo4jDataAutoConfigurationTests.java

@@ -29,6 +29,7 @@ import org.springframework.boot.autoconfigure.neo4j.Neo4jAutoConfiguration;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.data.neo4j.aot.Neo4jManagedTypes;
 import org.springframework.data.neo4j.core.DatabaseSelection;
 import org.springframework.data.neo4j.core.DatabaseSelectionProvider;
 import org.springframework.data.neo4j.core.Neo4jClient;
@@ -37,6 +38,7 @@ import org.springframework.data.neo4j.core.Neo4jTemplate;
 import org.springframework.data.neo4j.core.convert.Neo4jConversions;
 import org.springframework.data.neo4j.core.mapping.Neo4jMappingContext;
 import org.springframework.data.neo4j.core.transaction.Neo4jTransactionManager;
+import org.springframework.test.util.ReflectionTestUtils;
 import org.springframework.transaction.PlatformTransactionManager;
 import org.springframework.transaction.ReactiveTransactionManager;
 import org.springframework.transaction.TransactionManager;
@@ -162,6 +164,29 @@ class Neo4jDataAutoConfigurationTests {
 		});
 	}
 
+	@Test
+	void shouldProvideManagedTypes() {
+		this.contextRunner.run((context) -> {
+			assertThat(context).hasSingleBean(Neo4jManagedTypes.class);
+			assertThat(context.getBean(Neo4jMappingContext.class))
+				.extracting((mappingContext) -> ReflectionTestUtils.getField(mappingContext, "managedTypes"))
+				.isEqualTo(context.getBean(Neo4jManagedTypes.class));
+		});
+	}
+
+	@Test
+	void shouldReuseExistingManagedTypes() {
+		Neo4jManagedTypes managedTypes = Neo4jManagedTypes.from();
+		this.contextRunner.withBean("customManagedTypes", Neo4jManagedTypes.class, () -> managedTypes)
+			.run((context) -> {
+				assertThat(context).hasSingleBean(Neo4jManagedTypes.class);
+				assertThat(context).doesNotHaveBean("neo4jManagedTypes");
+				assertThat(context.getBean(Neo4jMappingContext.class))
+					.extracting((mappingContext) -> ReflectionTestUtils.getField(mappingContext, "managedTypes"))
+					.isSameAs(managedTypes);
+			});
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	static class CustomDatabaseSelectionProviderConfiguration {