Move "testdb" naming to DataSourceProperties

Move the "testdb" naming logic to `DataSourceProperties` and expose
the `deduceDatabaseName` method so they can be used in
auto-configuration.

See gh-11719

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/jdbc/DataSourceHealthIndicatorTests.java

 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -50,9 +50,8 @@ public class DataSourceHealthIndicatorTests {
 	@Before
 	public void init() {
 		EmbeddedDatabaseConnection db = EmbeddedDatabaseConnection.HSQL;
-		this.dataSource = new SingleConnectionDataSource(db.getUrl(
-				EmbeddedDatabaseConnection.DEFAULT_DATABASE_NAME) + ";shutdown=true",
-				"sa", "", false);
+		this.dataSource = new SingleConnectionDataSource(
+				db.getUrl("testdb") + ";shutdown=true", "sa", "", false);
 		this.dataSource.setDriverClassName(db.getDriverClassName());
 	}
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jdbc/DataSourceProperties.java

@@ -237,15 +237,12 @@ public class DataSourceProperties
 			return this.driverClassName;
 		}
 		String driverClassName = null;
-
 		if (StringUtils.hasText(this.url)) {
 			driverClassName = DatabaseDriver.fromJdbcUrl(this.url).getDriverClassName();
 		}
-
 		if (!StringUtils.hasText(driverClassName)) {
 			driverClassName = this.embeddedDatabaseConnection.getDriverClassName();
 		}
-
 		if (!StringUtils.hasText(driverClassName)) {
 			throw new DataSourceBeanCreationException(this.embeddedDatabaseConnection,
 					this.environment, "driver class");
@@ -289,7 +286,9 @@ public class DataSourceProperties
 		if (StringUtils.hasText(this.url)) {
 			return this.url;
 		}
-		String url = this.embeddedDatabaseConnection.getUrl(determineDatabaseName());
+		String databaseName = determineDatabaseName();
+		String url = (databaseName == null ? null
+				: this.embeddedDatabaseConnection.getUrl(databaseName));
 		if (!StringUtils.hasText(url)) {
 			throw new DataSourceBeanCreationException(this.embeddedDatabaseConnection,
 					this.environment, "url");
@@ -297,14 +296,25 @@ public class DataSourceProperties
 		return url;
 	}
 
-	private String determineDatabaseName() {
+	/**
+	 * Determine the name to used based on this configuration.
+	 * @return the database name to use or {@code null}
+	 * @since 2.0.0
+	 */
+	public String determineDatabaseName() {
 		if (this.generateUniqueName) {
 			if (this.uniqueName == null) {
 				this.uniqueName = UUID.randomUUID().toString();
 			}
 			return this.uniqueName;
 		}
-		return this.name;
+		if (StringUtils.hasLength(this.name)) {
+			return this.name;
+		}
+		if (this.embeddedDatabaseConnection != EmbeddedDatabaseConnection.NONE) {
+			return "testdb";
+		}
+		return null;
 	}
 
 	/**

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jdbc/EmbeddedDataSourceConfiguration.java

@@ -25,7 +25,6 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.jdbc.datasource.embedded.EmbeddedDatabase;
 import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
-import org.springframework.util.StringUtils;
 
 /**
  * Configuration for embedded data sources.
@@ -56,12 +55,9 @@ public class EmbeddedDataSourceConfiguration implements BeanClassLoaderAware {
 	@Bean
 	public EmbeddedDatabase dataSource() {
 		EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder()
-				.setType(EmbeddedDatabaseConnection.get(this.classLoader).getType());
-		String name = (StringUtils.hasText(this.properties.getName())
-				? this.properties.getName()
-				: EmbeddedDatabaseConnection.DEFAULT_DATABASE_NAME);
-		this.database = builder.setName(name)
-				.generateUniqueName(this.properties.isGenerateUniqueName()).build();
+				.setType(EmbeddedDatabaseConnection.get(this.classLoader).getType())
+				.setName(this.properties.determineDatabaseName());
+		this.database = builder.build();
 		return this.database;
 	}
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jdbc/DataSourceJmxConfigurationTests.java

@@ -74,8 +74,8 @@ public class DataSourceJmxConfigurationTests {
 	public void hikariAutoConfiguredWithoutDataSourceName()
 			throws MalformedObjectNameException {
 		MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
-		Set<ObjectInstance> existingInstances = mBeanServer.queryMBeans(
-				new ObjectName("com.zaxxer.hikari:type=*"), null);
+		Set<ObjectInstance> existingInstances = mBeanServer
+				.queryMBeans(new ObjectName("com.zaxxer.hikari:type=*"), null);
 		load("spring.datasource.type=" + HikariDataSource.class.getName(),
 				"spring.datasource.hikari.register-mbeans=true");
 		assertThat(this.context.getBeansOfType(HikariDataSource.class)).hasSize(1);
@@ -83,8 +83,9 @@ public class DataSourceJmxConfigurationTests {
 				.isTrue();
 		// We can rely on the number of MBeans so we're checking that the pool and pool
 		// config mBeans were registered
-		assertThat(mBeanServer.queryMBeans(new ObjectName("com.zaxxer.hikari:type=*"),
-				null).size()).isEqualTo(existingInstances.size() + 2);
+		assertThat(mBeanServer
+				.queryMBeans(new ObjectName("com.zaxxer.hikari:type=*"), null).size())
+						.isEqualTo(existingInstances.size() + 2);
 	}
 
 	@Test

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jdbc/DataSourcePropertiesTests.java

 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -62,8 +62,7 @@ public class DataSourcePropertiesTests {
 		properties.afterPropertiesSet();
 		assertThat(properties.getUrl()).isNull();
 		assertThat(properties.determineUrl())
-				.isEqualTo(EmbeddedDatabaseConnection.H2.getUrl(
-						EmbeddedDatabaseConnection.DEFAULT_DATABASE_NAME));
+				.isEqualTo(EmbeddedDatabaseConnection.H2.getUrl("testdb"));
 	}
 
 	@Test

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/jdbc/EmbeddedDatabaseConnection.java

@@ -25,8 +25,8 @@ import org.springframework.dao.DataAccessException;
 import org.springframework.jdbc.core.ConnectionCallback;
 import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
+import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
-import org.springframework.util.StringUtils;
 
 /**
  * Connection details for {@link EmbeddedDatabaseType embedded databases}.
@@ -60,11 +60,6 @@ public enum EmbeddedDatabaseConnection {
 	 */
 	HSQL(EmbeddedDatabaseType.HSQL, "org.hsqldb.jdbcDriver", "jdbc:hsqldb:mem:%s");
 
-	/**
-	 * Default database name.
-	 */
-	public static final String DEFAULT_DATABASE_NAME = "testdb";
-
 	private final EmbeddedDatabaseType type;
 
 	private final String driverClass;
@@ -95,15 +90,13 @@ public enum EmbeddedDatabaseConnection {
 	}
 
 	/**
-	 * Returns the URL for the connection using the specified {@code databaseName} or
-	 * {@value DEFAULT_DATABASE_NAME} if {@code databaseName} is empty or {@code null}.
+	 * Returns the URL for the connection using the specified {@code databaseName}.
 	 * @param databaseName the name of the database
 	 * @return the connection URL
 	 */
 	public String getUrl(String databaseName) {
-		String name = (StringUtils.hasText(databaseName)
-				? databaseName : DEFAULT_DATABASE_NAME);
-		return (this.url != null ? String.format(this.url, name) : null);
+		Assert.hasText(databaseName, "DatabaseName must not be empty");
+		return (this.url != null ? String.format(this.url, databaseName) : null);
 	}
 
 	/**

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/jdbc/EmbeddedDatabaseConnectionTests.java

 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -52,14 +52,16 @@ public class EmbeddedDatabaseConnectionTests {
 
 	@Test
 	public void getUrlWithNullDatabaseName() {
-		assertThat(EmbeddedDatabaseConnection.HSQL.getUrl(null))
-				.isEqualTo("jdbc:hsqldb:mem:testdb");
+		this.thrown.expect(IllegalArgumentException.class);
+		this.thrown.expectMessage("DatabaseName must not be empty");
+		EmbeddedDatabaseConnection.HSQL.getUrl(null);
 	}
 
 	@Test
 	public void getUrlWithEmptyDatabaseName() {
-		assertThat(EmbeddedDatabaseConnection.HSQL.getUrl("  "))
-				.isEqualTo("jdbc:hsqldb:mem:testdb");
+		this.thrown.expect(IllegalArgumentException.class);
+		this.thrown.expectMessage("DatabaseName must not be empty");
+		EmbeddedDatabaseConnection.HSQL.getUrl("  ");
 	}
 
 }