Add smoke test for r2dbc support

See gh-19988
Co-authored-by: Mark Paluch <mpaluch@pivotal.io>

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-data-r2dbc/build.gradle

+plugins {
+	id "java"
+	id "org.springframework.boot.conventions"
+}
+
+description = "Spring Boot Data R2DBC smoke test"
+
+dependencies {
+	implementation(project(":spring-boot-project:spring-boot-starters:spring-boot-starter-data-r2dbc"))
+	implementation(project(":spring-boot-project:spring-boot-starters:spring-boot-starter-webflux"))
+	implementation(project(":spring-boot-project:spring-boot-starters:spring-boot-starter-actuator"))
+
+	runtimeOnly("io.r2dbc:r2dbc-h2")
+
+	testImplementation(project(":spring-boot-project:spring-boot-starters:spring-boot-starter-test"))
+}

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-data-r2dbc/src/main/java/smoketest/data/r2dbc/City.java

+/*
+ * Copyright 2012-2020 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
+ *
+ *      https://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 smoketest.data.r2dbc;
+
+import org.springframework.data.annotation.Id;
+
+public class City {
+
+	@Id
+	private Long id;
+
+	private String name;
+
+	private String state;
+
+	private String country;
+
+	protected City() {
+	}
+
+	public City(String name, String country) {
+		this.name = name;
+		this.country = country;
+	}
+
+	public Long getId() {
+		return this.id;
+	}
+
+	public String getName() {
+		return this.name;
+	}
+
+	public String getState() {
+		return this.state;
+	}
+
+	public String getCountry() {
+		return this.country;
+	}
+
+	@Override
+	public String toString() {
+		return getName() + "," + getState() + "," + getCountry();
+	}
+
+}

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-data-r2dbc/src/main/java/smoketest/data/r2dbc/CityController.java

+/*
+ * Copyright 2012-2020 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
+ *
+ *      https://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 smoketest.data.r2dbc;
+
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class CityController {
+
+	private final CityRepository repository;
+
+	public CityController(CityRepository repository) {
+		this.repository = repository;
+	}
+
+	@GetMapping("/cities")
+	public Flux<City> findCities() {
+		return this.repository.findAll();
+	}
+
+	@GetMapping("/cities/{id}")
+	public Mono<City> findCityById(@PathVariable long id) {
+		return this.repository.findById(id);
+	}
+
+}

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-data-r2dbc/src/main/java/smoketest/data/r2dbc/CityRepository.java

+/*
+ * Copyright 2012-2020 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
+ *
+ *      https://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 smoketest.data.r2dbc;
+
+import org.springframework.data.repository.reactive.ReactiveCrudRepository;
+
+public interface CityRepository extends ReactiveCrudRepository<City, Long> {
+
+}

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-data-r2dbc/src/main/java/smoketest/data/r2dbc/SampleR2dbcApplication.java

+/*
+ * Copyright 2012-2020 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
+ *
+ *      https://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 smoketest.data.r2dbc;
+
+import io.r2dbc.spi.ConnectionFactory;
+
+import org.springframework.boot.ApplicationRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.ResourceLoader;
+import org.springframework.data.r2dbc.connectionfactory.init.ResourceDatabasePopulator;
+
+@SpringBootApplication
+public class SampleR2dbcApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SampleR2dbcApplication.class, args);
+	}
+
+	@Bean
+	public ApplicationRunner initializeDatabase(ConnectionFactory connectionFactory, ResourceLoader resourceLoader) {
+		return (arguments) -> {
+			Resource[] scripts = new Resource[] { resourceLoader.getResource("classpath:database-init.sql") };
+			new ResourceDatabasePopulator(scripts).execute(connectionFactory).block();
+		};
+
+	}
+
+}

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-data-r2dbc/src/main/resources/application.properties

+management.endpoint.health.show-details=always

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-data-r2dbc/src/main/resources/database-init.sql

+CREATE TABLE CITY (
+  id         INTEGER IDENTITY PRIMARY KEY,
+  name VARCHAR(30),
+  state  VARCHAR(30),
+  country  VARCHAR(30)
+);
+
+INSERT INTO CITY (ID, NAME, STATE, COUNTRY) values (2000, 'Washington', 'DC', 'US');
+INSERT INTO CITY (ID, NAME, STATE, COUNTRY) values (2001, 'San Francisco', 'CA', 'US');
+

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-data-r2dbc/src/test/java/smoketest/data/r2dbc/SampleR2dbcApplicationTests.java

+/*
+ * Copyright 2012-2020 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
+ *
+ *      https://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 smoketest.data.r2dbc;
+
+import javax.sql.DataSource;
+
+import net.minidev.json.JSONArray;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT, properties = "spring.r2dc.generate-unique-name=true")
+class SampleR2dbcApplicationTests {
+
+	@Autowired
+	private WebTestClient webClient;
+
+	@Autowired
+	private ApplicationContext applicationContext;
+
+	@Test
+	void citiesEndpointReturnInitialState() {
+		this.webClient.get().uri("/cities").exchange().expectBody().jsonPath("$[*].id")
+				.isEqualTo(new JSONArray().appendElement(2000).appendElement(2001));
+	}
+
+	@Test
+	void citiesEndpointByIdWithExistingIdReturnCity() {
+		this.webClient.get().uri("/cities/2001").exchange().expectBody().jsonPath("$.name").isEqualTo("San Francisco");
+	}
+
+	@Test
+	void healthEndpointHasR2dbcEntry() {
+		this.webClient.get().uri("/actuator/health").exchange().expectStatus().isOk().expectBody()
+				.jsonPath("components.r2dbc.status").isEqualTo("UP").jsonPath("components.r2dbc.details.database")
+				.isEqualTo("H2");
+	}
+
+	@Test
+	void dataSourceIsNotAutoConfigured() {
+		assertThat(this.applicationContext.getBeansOfType(DataSource.class)).isEmpty();
+	}
+
+}