Make MongoRepositoriesAutoConfiguration order more explicit

It has to come after MongoDataAutoConfiguration (not
MongoAutoConfiguration) because it looks for beans that are defined
there (e.g. MongoMappingContext which is the one that scans for entities).

Fixes gh-3577

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/mongo/MongoRepositoriesAutoConfiguration.java

@@ -21,7 +21,7 @@ import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
-import org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration;
+import org.springframework.boot.autoconfigure.mongo.MongoDataAutoConfiguration;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.data.mongodb.repository.MongoRepository;
@@ -58,7 +58,7 @@ import com.mongodb.Mongo;
 		MongoRepositoryConfigurationExtension.class })
 @ConditionalOnProperty(prefix = "spring.data.mongodb.repositories", name = "enabled", havingValue = "true", matchIfMissing = true)
 @Import(MongoRepositoriesAutoConfigureRegistrar.class)
-@AutoConfigureAfter(MongoAutoConfiguration.class)
+@AutoConfigureAfter(MongoDataAutoConfiguration.class)
 public class MongoRepositoriesAutoConfiguration {
 
 }

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/mongo/MongoRepositoriesAutoConfigurationTests.java

@@ -16,6 +16,8 @@
 
 package org.springframework.boot.autoconfigure.data.mongo;
 
+import java.util.Set;
+
 import org.junit.After;
 import org.junit.Test;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
@@ -29,11 +31,14 @@ import org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration;
 import org.springframework.boot.autoconfigure.mongo.MongoDataAutoConfiguration;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
 import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
+import org.springframework.test.util.ReflectionTestUtils;
 
 import com.mongodb.Mongo;
 import com.mongodb.MongoClient;
 
+import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.CoreMatchers.instanceOf;
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertNotNull;
@@ -61,6 +66,12 @@ public class MongoRepositoriesAutoConfigurationTests {
 		assertNotNull(this.context.getBean(CityRepository.class));
 		Mongo mongo = this.context.getBean(Mongo.class);
 		assertThat(mongo, is(instanceOf(MongoClient.class)));
+		MongoMappingContext mappingContext = this.context
+				.getBean(MongoMappingContext.class);
+		@SuppressWarnings("unchecked")
+		Set<? extends Class<?>> entities = (Set<? extends Class<?>>) ReflectionTestUtils
+				.getField(mappingContext, "initialEntitySet");
+		assertThat(entities.size(), is(equalTo(1)));
 	}
 
 	@Test