Add test slice for Spring Data R2DBC

This commit adds a test slice for Spring Data R2DBC. When
`DataR2dbcTest` is added on a test, only Spring Data R2DBC repositories
and the infrastructure that they need is auto-configured.

Contrary to the JDBC counterpart, the `ConnectionFactory` is not swapped
by an embedded database.

See gh-19988

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

spring-boot-project/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/data/r2dbc/AutoConfigureDataR2dbc.java

@@ -0,0 +1,44 @@
+/*
+ * 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 org.springframework.boot.test.autoconfigure.data.r2dbc;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
+
+/**
+ * {@link ImportAutoConfiguration Auto-configuration imports} for typical Data R2DBC
+ * tests. Most tests should consider using {@link DataR2dbcTest @DataR2dbcTest} rather
+ * than using this annotation directly.
+ *
+ * @author Mark Paluch
+ * @see DataR2dbcTest
+ * @since 2.3.0
+ */
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Inherited
+@ImportAutoConfiguration
+public @interface AutoConfigureDataR2dbc {
+
+}

spring-boot-project/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/data/r2dbc/DataR2dbcTest.java

@@ -0,0 +1,102 @@
+/*
+ * 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 org.springframework.boot.test.autoconfigure.data.r2dbc;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.junit.jupiter.api.extension.ExtendWith;
+
+import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.test.autoconfigure.OverrideAutoConfiguration;
+import org.springframework.boot.test.autoconfigure.filter.TypeExcludeFilters;
+import org.springframework.context.annotation.ComponentScan.Filter;
+import org.springframework.core.annotation.AliasFor;
+import org.springframework.core.env.Environment;
+import org.springframework.test.context.BootstrapWith;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+/**
+ * Annotation that can be used for a R2DBC test that focuses <strong>only</strong> on Data
+ * R2DBC components.
+ * <p>
+ * Using this annotation will disable full auto-configuration and instead apply only
+ * configuration relevant to Data R2DBC tests.
+ * <p>
+ * When using JUnit 4, this annotation should be used in combination with
+ * {@code @RunWith(SpringRunner.class)}.
+ *
+ * @author Mark Paluch
+ * @author Stephane Nicoll
+ * @since 2.3.0
+ */
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Inherited
+@BootstrapWith(DataR2dbcTestContextBootstrapper.class)
+@ExtendWith(SpringExtension.class)
+@OverrideAutoConfiguration(enabled = false)
+@TypeExcludeFilters(DataR2dbcTypeExcludeFilter.class)
+@AutoConfigureDataR2dbc
+@ImportAutoConfiguration
+public @interface DataR2dbcTest {
+
+	/**
+	 * Properties in form {@literal key=value} that should be added to the Spring
+	 * {@link Environment} before the test runs.
+	 * @return the properties to add
+	 */
+	String[] properties() default {};
+
+	/**
+	 * Determines if default filtering should be used with
+	 * {@link SpringBootApplication @SpringBootApplication}. By default no beans are
+	 * included.
+	 * @see #includeFilters()
+	 * @see #excludeFilters()
+	 * @return if default filters should be used
+	 */
+	boolean useDefaultFilters() default true;
+
+	/**
+	 * A set of include filters which can be used to add otherwise filtered beans to the
+	 * application context.
+	 * @return include filters to apply
+	 */
+	Filter[] includeFilters() default {};
+
+	/**
+	 * A set of exclude filters which can be used to filter beans that would otherwise be
+	 * added to the application context.
+	 * @return exclude filters to apply
+	 */
+	Filter[] excludeFilters() default {};
+
+	/**
+	 * Auto-configuration exclusions that should be applied for this test.
+	 * @return auto-configuration exclusions to apply
+	 */
+	@AliasFor(annotation = ImportAutoConfiguration.class, attribute = "exclude")
+	Class<?>[] excludeAutoConfiguration() default {};
+
+}

spring-boot-project/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/data/r2dbc/DataR2dbcTestContextBootstrapper.java

@@ -0,0 +1,37 @@
+/*
+ * 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 org.springframework.boot.test.autoconfigure.data.r2dbc;
+
+import org.springframework.boot.test.context.SpringBootTestContextBootstrapper;
+import org.springframework.core.annotation.MergedAnnotations;
+import org.springframework.core.annotation.MergedAnnotations.SearchStrategy;
+import org.springframework.test.context.TestContextBootstrapper;
+
+/**
+ * {@link TestContextBootstrapper} for {@link DataR2dbcTest @DataR2dbcTest} support.
+ *
+ * @author Mark Paluch
+ */
+class DataR2dbcTestContextBootstrapper extends SpringBootTestContextBootstrapper {
+
+	@Override
+	protected String[] getProperties(Class<?> testClass) {
+		return MergedAnnotations.from(testClass, SearchStrategy.INHERITED_ANNOTATIONS).get(DataR2dbcTest.class)
+				.getValue("properties", String[].class).orElse(null);
+	}
+
+}

spring-boot-project/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/data/r2dbc/DataR2dbcTypeExcludeFilter.java

@@ -0,0 +1,33 @@
+/*
+ * 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 org.springframework.boot.test.autoconfigure.data.r2dbc;
+
+import org.springframework.boot.context.TypeExcludeFilter;
+import org.springframework.boot.test.autoconfigure.filter.StandardAnnotationCustomizableTypeExcludeFilter;
+
+/**
+ * {@link TypeExcludeFilter} for {@link DataR2dbcTest @DataR2dbcTest}.
+ *
+ * @author Mark Paluch
+ */
+class DataR2dbcTypeExcludeFilter extends StandardAnnotationCustomizableTypeExcludeFilter<DataR2dbcTest> {
+
+	DataR2dbcTypeExcludeFilter(Class<?> testClass) {
+		super(testClass);
+	}
+
+}

spring-boot-project/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/data/r2dbc/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * 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.
+ */
+
+/**
+ * Auto-configuration for Data R2DBC tests.
+ */
+package org.springframework.boot.test.autoconfigure.data.r2dbc;

spring-boot-project/spring-boot-test-autoconfigure/src/main/resources/META-INF/spring.factories

@@ -45,6 +45,14 @@ org.springframework.boot.autoconfigure.data.neo4j.Neo4jDataAutoConfiguration,\
 org.springframework.boot.autoconfigure.data.neo4j.Neo4jRepositoriesAutoConfiguration,\
 org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration
 
+# AutoConfigureDataR2dbc auto-configuration imports
+org.springframework.boot.test.autoconfigure.data.r2dbc.AutoConfigureDataR2dbc=\
+org.springframework.boot.autoconfigure.data.r2dbc.R2dbcRepositoriesAutoConfiguration,\
+org.springframework.boot.autoconfigure.data.r2dbc.R2dbcTransactionManagerAutoConfiguration,\
+org.springframework.boot.autoconfigure.data.r2dbc.R2dbcDataAutoConfiguration,\
+org.springframework.boot.autoconfigure.r2dbc.R2dbcAutoConfiguration,\
+org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration
+
 # AutoConfigureDataRedis auto-configuration imports
 org.springframework.boot.test.autoconfigure.data.redis.AutoConfigureDataRedis=\
 org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration,\