Consider properties from @AutoConfigureTestDatabase

Both Flyway and Liquibase makes use of DataSourceProperties to get
default properties. Previously, both used strictly the configuration
properties and failed to consider embedded datasource properties
autoconfigured by @AutoConfigureTestDatabase. In case a database layer
test e.g. @JdbcTest relies on the autoconfigured embedded datasource,
Flyway and Liquibase autoconfiguration fails as they are not aware of
the embedded datasource properties.

See gh-16814

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/flyway/FlywayAutoConfiguration.java

@@ -79,6 +79,7 @@ import org.springframework.util.StringUtils;
  * @author Eddú Meléndez
  * @author Dominic Gunn
  * @author Dan Zheng
+ * @author András Deák
  * @since 1.1.0
  */
 @SuppressWarnings("deprecation")
@@ -156,9 +157,10 @@ public class FlywayAutoConfiguration {
 
 		private DataSource configureDataSource(FluentConfiguration configuration) {
 			if (this.properties.isCreateDataSource()) {
-				String url = getProperty(this.properties::getUrl, this.dataSourceProperties::getUrl);
+				String url = getProperty(this.properties::getUrl, this.dataSourceProperties::determineUrl);
-				String user = getProperty(this.properties::getUser, this.dataSourceProperties::getUsername);
+				String user = getProperty(this.properties::getUser, this.dataSourceProperties::determineUsername);
-				String password = getProperty(this.properties::getPassword, this.dataSourceProperties::getPassword);
+				String password = getProperty(this.properties::getPassword,
+						this.dataSourceProperties::determinePassword);
 				configuration.dataSource(url, user, password);
 				if (!CollectionUtils.isEmpty(this.properties.getInitSqls())) {
 					String initSql = StringUtils.collectionToDelimitedString(this.properties.getInitSqls(), "\n");

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/liquibase/LiquibaseAutoConfiguration.java

@@ -61,6 +61,7 @@ import org.springframework.util.Assert;
  * @author Andy Wilkinson
  * @author Dominic Gunn
  * @author Dan Zheng
+ * @author András Deák
  * @since 1.1.0
  */
 @Configuration
@@ -153,9 +154,9 @@ public class LiquibaseAutoConfiguration {
 		}
 
 		private DataSource createNewDataSource() {
-			String url = getProperty(this.properties::getUrl, this.dataSourceProperties::getUrl);
+			String url = getProperty(this.properties::getUrl, this.dataSourceProperties::determineUrl);
-			String user = getProperty(this.properties::getUser, this.dataSourceProperties::getUsername);
+			String user = getProperty(this.properties::getUser, this.dataSourceProperties::determineUsername);
-			String password = getProperty(this.properties::getPassword, this.dataSourceProperties::getPassword);
+			String password = getProperty(this.properties::getPassword, this.dataSourceProperties::determinePassword);
 			return DataSourceBuilder.create().url(url).username(user).password(password).build();
 		}
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/flyway/FlywayAutoConfigurationTests.java

@@ -30,6 +30,7 @@ import org.flywaydb.core.api.callback.Callback;
 import org.flywaydb.core.api.callback.Context;
 import org.flywaydb.core.api.callback.Event;
 import org.flywaydb.core.api.callback.FlywayCallback;
+import org.flywaydb.core.internal.jdbc.DriverDataSource;
 import org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform;
 import org.junit.Test;
 import org.mockito.InOrder;
@@ -66,6 +67,7 @@ import static org.mockito.Mockito.mock;
  * @author Eddú Meléndez
  * @author Stephane Nicoll
  * @author Dominic Gunn
+ * @author András Deák
  */
 @SuppressWarnings("deprecation")
 public class FlywayAutoConfigurationTests {
@@ -98,6 +100,30 @@ public class FlywayAutoConfigurationTests {
 				});
 	}
 
+	@Test
+	public void createDataSourceFallbackToEmbeddedProperties() {
+		this.contextRunner.withUserConfiguration(EmbeddedDataSourceConfiguration.class)
+				.withPropertyValues("spring.flyway.url:jdbc:hsqldb:mem:flywaytest").run((context) -> {
+					assertThat(context).hasSingleBean(Flyway.class);
+					assertThat(context.getBean(Flyway.class).getDataSource()).isNotNull();
+					assertThat(((DriverDataSource) context.getBean(Flyway.class).getDataSource()).getUser())
+							.isEqualTo("sa");
+					assertThat(((DriverDataSource) context.getBean(Flyway.class).getDataSource()).getPassword())
+							.isEqualTo("");
+				});
+	}
+
+	@Test
+	public void createDataSourceWithUserAndFallbackToEmbeddedProperties() {
+		this.contextRunner.withUserConfiguration(EmbeddedDataSourceConfiguration.class)
+				.withPropertyValues("spring.flyway.user:sa").run((context) -> {
+					assertThat(context).hasSingleBean(Flyway.class);
+					assertThat(context.getBean(Flyway.class).getDataSource()).isNotNull();
+					assertThat(((DriverDataSource) context.getBean(Flyway.class).getDataSource()).getUrl())
+							.startsWith("jdbc:h2:mem:");
+				});
+	}
+
 	@Test
 	public void flywayDataSource() {
 		this.contextRunner

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/liquibase/LiquibaseAutoConfigurationTests.java

@@ -60,6 +60,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Andy Wilkinson
  * @author Stephane Nicoll
  * @author Dominic Gunn
+ * @author András Deák
  */
 public class LiquibaseAutoConfigurationTests {
 
@@ -199,6 +200,28 @@ public class LiquibaseAutoConfigurationTests {
 				}));
 	}
 
+	@Test
+	public void overrideDataSourceAndFallbackToEmbeddedProperties() {
+		this.contextRunner.withUserConfiguration(EmbeddedDataSourceConfiguration.class)
+				.withPropertyValues("spring.liquibase.url:jdbc:hsqldb:mem:liquibase")
+				.run(assertLiquibase((liquibase) -> {
+					DataSource dataSource = liquibase.getDataSource();
+					assertThat(((HikariDataSource) dataSource).isClosed()).isTrue();
+					assertThat(((HikariDataSource) dataSource).getUsername()).isEqualTo("sa");
+					assertThat(((HikariDataSource) dataSource).getPassword()).isEqualTo("");
+				}));
+	}
+
+	@Test
+	public void overrideUserAndFallbackToEmbeddedProperties() {
+		this.contextRunner.withUserConfiguration(EmbeddedDataSourceConfiguration.class)
+				.withPropertyValues("spring.liquibase.user:sa").run(assertLiquibase((liquibase) -> {
+					DataSource dataSource = liquibase.getDataSource();
+					assertThat(((HikariDataSource) dataSource).isClosed()).isTrue();
+					assertThat(((HikariDataSource) dataSource).getJdbcUrl()).startsWith("jdbc:h2:mem:");
+				}));
+	}
+
 	@Test
 	public void overrideTestRollbackOnUpdate() {
 		this.contextRunner.withUserConfiguration(EmbeddedDataSourceConfiguration.class)

src/checkstyle/checkstyle-suppressions.xml

@@ -35,4 +35,5 @@
 	<suppress files="LogbackMetricsAutoConfiguration\.java" checks="IllegalImport" />
 	<suppress files="RemoteUrlPropertyExtractorTests\.java" checks="IllegalImport" />
 	<suppress files="SampleLogbackApplication\.java" checks="IllegalImport" />
+	<suppress files="FlywayAutoConfigurationTests\.java" checks="IllegalImport" />
 </suppressions>