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;

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);
    LegoSet legoSet2 = new LegoSet(null, "SCHAUFELRADBAGGER", 13);

    Flux<Map<String, Object>> transactional = client.inTransaction(db ->
      legoSetRepository.save(legoSet1)
          .then(legoSetRepository.save(legoSet2))
          .then(Mono.empty()));

    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 {}
}