Test support module

docs/src/main/asciidoc/test.adoc

@@ -0,0 +1,108 @@
+== Emulators support
+Our tools simplify starting and stopping Cloud PubSub and Cloud Spanner emulators when you test your application.
+
+In order to use it, you need to add this dependency into your `pom.xml` file:
+
+[source,xml]
+----
+<dependency>
+	<groupId>org.springframework.cloud</groupId>
+	<artifactId>spring-cloud-gcp-test</artifactId>
+	<scope>test</scope>
+</dependency>
+----
+
+Also, you need to have `gcloud` and the emulators installed and configured, as described later.
+
+=== Cloud PubSub Emulator
+In order to use our Cloud PubSub Emulator helper tools, you would need to install the emulator first.
+Follow the https://cloud.google.com/pubsub/docs/emulator[installation instructions].
+
+==== JUnit 4 Class Rule
+The rule starts the emulator process before the tests run and kills it afterwards.
+You just need to add a rule into your test class to enable it.
+
+[source,java]
+----
+import org.springframework.cloud.gcp.test.PubSubEmulatorRule;
+
+public class PubSubTests {
+	@ClassRule
+	public static PubSubEmulatorRule emulator = new PubSubEmulatorRule();
+
+		//your tests
+}
+----
+
+==== Utility class
+If you prefer controlling the emulator manually, you can use PubSubEmulatorHelper.
+
+[source,java]
+----
+	PubSubEmulatorHelper emulatorHelper = new PubSubEmulatorHelper();
+
+	emulatorHelper.startEmulator();
+
+	//your code
+
+	emulatorHelper.shutdownEmulator();
+----
+
+=== Cloud Spanner Emulator
+In order to use our Cloud Spanner Emulator helper tools, you would need to install the emulator first.
+Follow the https://cloud.google.com/spanner/docs/emulator[installation instructions].
+Make sure you create an emulator configuration and call it `emulator`.
+
+==== Spring Configuration
+If you are testing your Spring application, you can use our configuration class.
+It provides a bean of type Spanner, which starts the emulator before creating a client.
+This configuration also stops the emulator when the Spring context is shut down.
+
+In order to use it, you need to add the SpannerEmulatorSpringConfiguration.class to your configuration classes list in `@ContextConfiguration`.
+
+[source,java]
+----
+import org.junit.runner.RunWith;
+
+import org.springframework.cloud.gcp.test.SpannerEmulatorSpringConfiguration;
+
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = {SpannerEmulatorSpringConfiguration.class, YourSpringConfiguration.class})
+public class SpannerTemplateEmulatorTests {
+		//your tests
+}
+----
+
+==== JUnit 4 Class Rule
+If you don't use spring in your tests, you can use the class rule.
+
+NOTE: The rule does not work with SpringRunner!
+See <<Spring Configuration>> section instead.
+
+[source,java]
+----
+import org.springframework.cloud.gcp.test.SpannerEmulatorRule;
+
+public class SpannerTests {
+	@ClassRule
+	public static SpannerEmulatorRule emulator = new SpannerEmulatorRule();
+
+	//your tests
+}
+----
+
+
+
+==== Utility class
+If you prefer controlling the emulator manually, you can use SpannerEmulatorHelper.
+
+[source,java]
+----
+	SpannerEmulatorHelper emulatorHelper = new SpannerEmulatorHelper();
+
+	emulatorHelper.startEmulator();
+
+	//your code
+
+	emulatorHelper.shutdownEmulator();
+----

pom.xml

@@ -45,6 +45,7 @@
 		<module>spring-cloud-gcp-bigquery</module>
 		<module>spring-cloud-gcp-security-firebase</module>
 		<module>spring-cloud-gcp-secretmanager</module>
+		<module>spring-cloud-gcp-test</module>
 	</modules>
 
 	<properties>

spring-cloud-gcp-data-spanner/pom.xml

@@ -42,5 +42,10 @@
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-tx</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-gcp-test</artifactId>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 </project>

spring-cloud-gcp-data-spanner/src/test/java/org/springframework/cloud/gcp/data/spanner/core/it/SpannerTemplateEmulatorTests.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2017-2018 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.cloud.gcp.data.spanner.core.it;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.cloud.gcp.data.spanner.test.AbstractSpannerIntegrationTest;
+import org.springframework.cloud.gcp.data.spanner.test.domain.Trade;
+import org.springframework.cloud.gcp.test.SpannerEmulatorSpringConfiguration;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests that use many features of the Spanner Template.
+ *
+ * @author Balint Pato
+ * @author Chengyuan Zhao
+ */
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = {SpannerEmulatorSpringConfiguration.class})
+public class SpannerTemplateEmulatorTests extends AbstractSpannerIntegrationTest {
+
+	@Test
+	public void insertSingleRow() {
+
+		Trade trade = Trade.aTrade(null, 1);
+		this.spannerOperations.insert(trade);
+		assertThat(this.spannerOperations.count(Trade.class)).isEqualTo(1L);
+	}
+
+}

spring-cloud-gcp-data-spanner/src/test/java/org/springframework/cloud/gcp/data/spanner/test/IntegrationTestConfiguration.java

@@ -26,6 +26,7 @@
 import com.google.cloud.spanner.SpannerOptions;
 
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.cloud.gcp.core.Credentials;
 import org.springframework.cloud.gcp.core.DefaultCredentialsProvider;
 import org.springframework.cloud.gcp.core.DefaultGcpProjectIdProvider;
@@ -104,6 +105,7 @@ public TradeRepositoryTransactionalService tradeRepositoryTransactionalService()
 	}
 
 	@Bean
+	@ConditionalOnMissingBean
 	public SpannerOptions spannerOptions() {
 		return SpannerOptions.newBuilder().setProjectId(getProjectId())
 				.setSessionPoolOption(SessionPoolOptions.newBuilder().setMaxSessions(10).build())
@@ -116,6 +118,7 @@ public DatabaseId databaseId() {
 	}
 
 	@Bean
+	@ConditionalOnMissingBean
 	public Spanner spanner(SpannerOptions spannerOptions) {
 		return spannerOptions.getService();
 	}

spring-cloud-gcp-dependencies/pom.xml

@@ -190,7 +190,11 @@
 				<artifactId>spring-cloud-gcp-starter-secretmanager</artifactId>
 				<version>${project.version}</version>
 			</dependency>
-
+			<dependency>
+				<groupId>org.springframework.cloud</groupId>
+				<artifactId>spring-cloud-gcp-test</artifactId>
+				<version>${project.version}</version>
+			</dependency>
 			<!-- spring-cloud-gcp-starter-sql -->
 			<dependency>
 				<groupId>com.google.cloud.sql</groupId>

spring-cloud-gcp-pubsub-stream-binder/pom.xml

@@ -42,5 +42,10 @@
 			<version>3.1.0.BUILD-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-gcp-test</artifactId>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 </project>