Reproducer for https://github.com/spring-projects/spring-data-r2dbc/issues/48

Repro.java

/*
 * Copyright 2019 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.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.data.r2dbc.repository;

import io.r2dbc.spi.ConnectionFactory;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.test.StepVerifier;

import java.util.Map;

import org.junit.Before;
import org.junit.ClassRule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.context.annotation.FilterType;
import org.springframework.data.annotation.Id;
import org.springframework.data.r2dbc.config.AbstractR2dbcConfiguration;
import org.springframework.data.r2dbc.function.ReactiveDataAccessStrategy;
import org.springframework.data.r2dbc.function.TransactionalDatabaseClient;
import org.springframework.data.r2dbc.repository.config.EnableR2dbcRepositories;
import org.springframework.data.r2dbc.support.R2dbcExceptionTranslator;
import org.springframework.data.r2dbc.testing.ExternalDatabase;
import org.springframework.data.r2dbc.testing.PostgresTestSupport;
import org.springframework.data.r2dbc.testing.R2dbcIntegrationTestSupport;
import org.springframework.data.relational.core.mapping.Table;
import org.springframework.data.repository.reactive.ReactiveCrudRepository;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;

/**
 * @author Mark Paluch
 */
@RunWith(SpringRunner.class)
@ContextConfiguration
public class Repro extends R2dbcIntegrationTestSupport {

	public static String CREATE_TABLE_LEGOSET_WITH_ID_GENERATION = "CREATE TABLE legoset (\n" //
			+ "    id          serial CONSTRAINT id PRIMARY KEY,\n" //
			+ "    name        varchar(255) NOT NULL,\n" //
			+ "    manual      integer NULL\n" //
			+ ");";

	@ClassRule public static final ExternalDatabase database = PostgresTestSupport.database();

	@Autowired LegoSetRepository legoSetRepository;

	@Autowired TransactionalDatabaseClient client;

	@EnableR2dbcRepositories(databaseClientRef = "transactionalDatabaseClient", considerNestedRepositories = true,
			includeFilters = @Filter(value = LegoSetRepository.class, type = FilterType.ASSIGNABLE_TYPE))
	static class MyConfig extends AbstractR2dbcConfiguration {

		@Bean
		@Override
		public ConnectionFactory connectionFactory() {
			return PostgresTestSupport.createConnectionFactory(database);
		}

		@Bean
		public TransactionalDatabaseClient transactionalDatabaseClient(ReactiveDataAccessStrategy dataAccessStrategy,
				R2dbcExceptionTranslator exceptionTranslator) {

			return TransactionalDatabaseClient.builder() //
					.connectionFactory(connectionFactory()) //
					.dataAccessStrategy(dataAccessStrategy) //
					.exceptionTranslator(exceptionTranslator) //
					.build();
		}
	}

	@Before
	public void before() {

		client.execute().sql("DROP TABLE IF EXISTS legoset;").then() //
				.doOnSuccessOrError((aVoid, throwable) -> {}) //
				.as(StepVerifier::create) //
				.verifyComplete();

		client.execute().sql(CREATE_TABLE_LEGOSET_WITH_ID_GENERATION).then() //
				.as(StepVerifier::create) //
				.verifyComplete();
	}

	@Test
	public void reproducer() {

		LegoSet legoSet1 = new LegoSet(null, "SCHAUFELRADBAGGER", 12);

		Flux<Map<String, Object>> transactional = client.inTransaction(db -> {

			return legoSetRepository.save(legoSet1) //
					.then(Mono.error(new MyException()));
		});

		transactional.as(StepVerifier::create) //
				.expectError(MyException.class) //
				.verify();

		legoSetRepository.count() //
				.as(StepVerifier::create) //
				.expectNext(0L) //
				.verifyComplete();
	}

	interface LegoSetRepository extends ReactiveCrudRepository<LegoSet, Integer> {}

	@Data
	@Table("legoset")
	@AllArgsConstructor
	@NoArgsConstructor
	static class LegoSet {
		@Id Integer id;
		String name;
		Integer manual;
	}

	static class MyException extends RuntimeException {}
}