Refactor tests to use the new database-name attribute

This commit refactors the XML configuration used by the tests in the
Spr8849Tests test suite so that a unique database name is always
generated (via the new 'database-name' attribute that was introduced in
SPR-12835) while reusing the same bean name (i.e., 'dataSource').

This is a much more robust alternative to the previous work-around
since the name of the DataSource does not randomly change across
application contexts, thus allowing proper autowiring by name and bean
referencing within XML configuration.

Issue: SPR-8849

spring-test/src/test/java/org/springframework/test/context/junit4/spr8849/Spr8849Tests.java

 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -24,16 +24,14 @@ import org.junit.runners.Suite.SuiteClasses;
  * Test suite to investigate claims raised in
  * <a href="https://jira.spring.io/browse/SPR-8849">SPR-8849</a>.
  *
- * <p>By using a SpEL expression to generate a random {@code id} for the
- * embedded database (see {@code datasource-config.xml}), we ensure that each
- * {@code ApplicationContext} that imports the common configuration will create
- * an embedded database with a unique name (since the {@code id} is used as the
- * database name within
- * {@link org.springframework.jdbc.config.EmbeddedDatabaseBeanDefinitionParser#useIdAsDatabaseNameIfGiven()}).
+ * <p>By using a SpEL expression to generate a random {@code database-name}
+ * for the embedded database (see {@code datasource-config.xml}), we ensure
+ * that each {@code ApplicationContext} that imports the common configuration
+ * will create an embedded database with a unique name.
  *
- * <p>To reproduce the problem mentioned in SPEX-8849, change the {@code id} of
- * the embedded database in {@code datasource-config.xml} to "dataSource" (or
- * anything else that is not random) and run this <em>suite</em>.
+ * <p>To reproduce the problem mentioned in SPR-8849, delete the declaration
+ * of the {@code database-name} attribute of the embedded database in
+ * {@code datasource-config.xml} and run this <em>suite</em>.
  *
  * @author Sam Brannen
  * @since 3.2

spring-test/src/test/java/org/springframework/test/context/junit4/spr8849/TestClass1.java

 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -16,15 +16,18 @@
 
 package org.springframework.test.context.junit4.spr8849;
 
+import javax.annotation.Resource;
 import javax.sql.DataSource;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
-
-import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.ImportResource;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
+import static org.junit.Assert.*;
+
 /**
  * This name of this class intentionally does not end with "Test" or "Tests"
  * since it should only be run as part of the test suite: {@link Spr8849Tests}.
@@ -38,13 +41,19 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 @ContextConfiguration
 public class TestClass1 {
 
-	@Autowired
-	DataSource datasource;
+	@Configuration
+	@ImportResource("classpath:/org/springframework/test/context/junit4/spr8849/datasource-config.xml")
+	static class Config {
+	}
+
+
+	@Resource
+	DataSource dataSource;
 
 
 	@Test
 	public void dummyTest() {
-		// it's sufficient if the ApplicationContext loads without errors.
+		assertNotNull(dataSource);
 	}
 
 }
\ No newline at end of file

spring-test/src/test/java/org/springframework/test/context/junit4/spr8849/TestClass2.java

 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -16,15 +16,18 @@
 
 package org.springframework.test.context.junit4.spr8849;
 
+import javax.annotation.Resource;
 import javax.sql.DataSource;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
-
-import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.ImportResource;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
+import static org.junit.Assert.*;
+
 /**
  * This name of this class intentionally does not end with "Test" or "Tests"
  * since it should only be run as part of the test suite: {@link Spr8849Tests}.
@@ -38,13 +41,19 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 @ContextConfiguration
 public class TestClass2 {
 
-	@Autowired
+	@Configuration
+	@ImportResource("classpath:/org/springframework/test/context/junit4/spr8849/datasource-config.xml")
+	static class Config {
+	}
+
+
+	@Resource
 	DataSource dataSource;
 
 
 	@Test
 	public void dummyTest() {
-		// it's sufficient if the ApplicationContext loads without errors.
+		assertNotNull(dataSource);
 	}
 
 }
\ No newline at end of file

spring-test/src/test/resources/org/springframework/test/context/junit4/spr8849/TestClass1-context.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
-
-	<import resource="datasource-config.xml"/>
-
-</beans>

spring-test/src/test/resources/org/springframework/test/context/junit4/spr8849/TestClass2-context.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
-
-	<import resource="datasource-config.xml"/>
-
-</beans>

spring-test/src/test/resources/org/springframework/test/context/junit4/spr8849/datasource-config.xml

@@ -2,10 +2,10 @@
 <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xmlns:jdbc="http://www.springframework.org/schema/jdbc"
 	xsi:schemaLocation="
-		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
-		http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd">
+		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.2.xsd">
 
-	<jdbc:embedded-database id="#{T(java.util.UUID).randomUUID().toString()}">
+	<jdbc:embedded-database id="dataSource" database-name="#{T(java.util.UUID).randomUUID().toString()}">
 		<jdbc:script location="classpath:/org/springframework/test/context/junit4/spr8849/spr8849-schema.sql" />
 	</jdbc:embedded-database>