Improve Couchbase repository support

Previously, if Couchbase was available on the classpath but not
configured, Spring Boot would attempt to scan the project for
repositories anyway.

This commit makes sure that it only happens if an infrastructure
bean required is present. The tests have also been rewritten to better
reflect what would happen in practice.

Closes gh-5349

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/couchbase/CouchbaseRepositoriesAutoConfiguration.java

@@ -19,12 +19,14 @@ package org.springframework.boot.autoconfigure.data.couchbase;
 import com.couchbase.client.java.Bucket;
 
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.data.couchbase.repository.CouchbaseRepository;
+import org.springframework.data.couchbase.repository.config.RepositoryOperationsMapping;
 import org.springframework.data.couchbase.repository.support.CouchbaseRepositoryFactoryBean;
 
 /**
@@ -32,10 +34,12 @@ import org.springframework.data.couchbase.repository.support.CouchbaseRepository
  * Repositories.
  *
  * @author Eddú Meléndez
+ * @author Stephane Nicoll
  * @since 1.4.0
  */
 @Configuration
 @ConditionalOnClass({ Bucket.class, CouchbaseRepository.class })
+@ConditionalOnBean(RepositoryOperationsMapping.class)
 @ConditionalOnProperty(prefix = "spring.data.couchbase.repositories", name = "enabled", havingValue = "true", matchIfMissing = true)
 @ConditionalOnMissingBean(CouchbaseRepositoryFactoryBean.class)
 @Import(CouchbaseRepositoriesRegistrar.class)

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/couchbase/CouchbaseRepositoriesAutoConfigurationTests.java

@@ -16,18 +16,17 @@
 
 package org.springframework.boot.autoconfigure.data.couchbase;
 
-import com.couchbase.client.java.Bucket;
 import org.junit.After;
 import org.junit.Test;
 
 import org.springframework.boot.autoconfigure.PropertyPlaceholderAutoConfiguration;
 import org.springframework.boot.autoconfigure.TestAutoConfigurationPackage;
-import org.springframework.boot.autoconfigure.couchbase.CouchbaseProperties;
+import org.springframework.boot.autoconfigure.couchbase.CouchbaseAutoConfiguration;
 import org.springframework.boot.autoconfigure.couchbase.CouchbaseTestConfiguration;
 import org.springframework.boot.autoconfigure.data.couchbase.city.City;
 import org.springframework.boot.autoconfigure.data.couchbase.city.CityRepository;
 import org.springframework.boot.autoconfigure.data.empty.EmptyDataPackage;
-import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.boot.test.EnvironmentTestUtils;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
@@ -38,6 +37,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * Tests for {@link CouchbaseRepositoriesAutoConfiguration}.
  *
  * @author Eddú Meléndez
+ * @author Stephane Nicoll
  */
 public class CouchbaseRepositoriesAutoConfigurationTests {
 
@@ -45,39 +45,67 @@ public class CouchbaseRepositoriesAutoConfigurationTests {
 
 	@After
 	public void close() {
-		this.context.close();
+		if (this.context != null) {
+			this.context.close();
+		}
 	}
 
 	@Test
-	public void testDefaultRepositoryConfiguration() throws Exception {
-		this.context = new AnnotationConfigApplicationContext();
-		this.context.register(TestConfiguration.class,
-				PropertyPlaceholderAutoConfiguration.class);
-		this.context.refresh();
-		assertThat(this.context.getBean(CityRepository.class)).isNotNull();
-		assertThat(this.context.getBean(Bucket.class)).isNotNull();
+	public void couchbaseNotAvailable() throws Exception {
+		load(CouchbaseNotAvailableConfiguration.class);
+		assertThat(this.context.getBeansOfType(CityRepository.class)).hasSize(0);
 	}
 
 	@Test
-	public void testNoRepositoryConfiguration() throws Exception {
-		this.context = new AnnotationConfigApplicationContext();
-		this.context.register(EmptyConfiguration.class, TestConfiguration.class,
-				PropertyPlaceholderAutoConfiguration.class);
-		this.context.refresh();
-		assertThat(this.context.getBean(Bucket.class)).isNotNull();
+	public void defaultRepository() throws Exception {
+		load(DefaultConfiguration.class);
+		assertThat(this.context.getBeansOfType(CityRepository.class)).hasSize(1);
 	}
 
+	@Test
+	public void disableRepository() {
+		load(DefaultConfiguration.class, "spring.data.couchbase.repositories.enabled=false");
+		assertThat(this.context.getBeansOfType(CityRepository.class)).hasSize(0);
+	}
+
+	@Test
+	public void noRepositoryAvailable() throws Exception {
+		load(NoRepositoryConfiguration.class);
+		assertThat(this.context.getBeansOfType(CityRepository.class)).hasSize(0);
+	}
+
+	private void load(Class<?> config, String... environment) {
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
+		EnvironmentTestUtils.addEnvironment(context, environment);
+		if (config != null) {
+			context.register(config);
+		}
+		context.register(PropertyPlaceholderAutoConfiguration.class,
+				CouchbaseAutoConfiguration.class,
+				CouchbaseRepositoriesAutoConfiguration.class);
+		context.refresh();
+		this.context = context;
+	}
+
+
+	@Configuration
+	@TestAutoConfigurationPackage(City.class)
+	static class CouchbaseNotAvailableConfiguration {
+
+	}
+
+
 	@Configuration
 	@TestAutoConfigurationPackage(City.class)
-	@EnableConfigurationProperties(CouchbaseProperties.class)
-	@Import({ CouchbaseRepositoriesRegistrar.class, CouchbaseTestConfiguration.class })
-	static class TestConfiguration {
+	@Import(CouchbaseTestConfiguration.class)
+	static class DefaultConfiguration {
 
 	}
 
 	@Configuration
 	@TestAutoConfigurationPackage(EmptyDataPackage.class)
-	protected static class EmptyConfiguration {
+	@Import(CouchbaseTestConfiguration.class)
+	protected static class NoRepositoryConfiguration {
 
 	}