Fix Allow ignoreMigrationPatterns to be empty

Removes the `.whenNot(List::isEmpty)` condition to allow clearing the
ignore-migration-patterns property via an empty string.

To avoid affecting existing users, the property's default is now
aligned with Flyway's default of `*:future`

Signed-off-by: Chanwon-Seo <scwonn60@gmail.com>

Author: Chanwon-Seo

module/spring-boot-flyway/src/main/java/org/springframework/boot/flyway/autoconfigure/FlywayProperties.java

@@ -323,7 +323,7 @@ public class FlywayProperties {
 	/**
 	 * List of patterns that identify migrations to ignore when performing validation.
 	 */
-	private @Nullable List<String> ignoreMigrationPatterns;
+	private List<String> ignoreMigrationPatterns = Collections.singletonList("*:future");
 
 	/**
 	 * Whether to attempt to automatically detect SQL migration file encoding.
@@ -757,11 +757,11 @@ public void setSkipExecutingMigrations(@Nullable Boolean skipExecutingMigrations
 		this.skipExecutingMigrations = skipExecutingMigrations;
 	}
 
-	public @Nullable List<String> getIgnoreMigrationPatterns() {
+	public List<String> getIgnoreMigrationPatterns() {
 		return this.ignoreMigrationPatterns;
 	}
 
-	public void setIgnoreMigrationPatterns(@Nullable List<String> ignoreMigrationPatterns) {
+	public void setIgnoreMigrationPatterns(List<String> ignoreMigrationPatterns) {
 		this.ignoreMigrationPatterns = ignoreMigrationPatterns;
 	}
 

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

@@ -898,7 +898,14 @@ void ignoreMigrationPatternsCorrectlyMapped() {
 	}
 
 	@Test
-	void ignoreMigrationPatternsIsEmpty() {
+	void ignoreMigrationPatternsUsesDefaultValuesWhenNotSet() {
+		this.contextRunner.withUserConfiguration(EmbeddedDataSourceConfiguration.class)
+			.run((context) -> assertThat(context.getBean(Flyway.class).getConfiguration().getIgnoreMigrationPatterns())
+				.containsExactly(new FluentConfiguration().getIgnoreMigrationPatterns()));
+	}
+
+	@Test
+	void ignoreMigrationPatternsWhenEmpty() {
 		this.contextRunner.withUserConfiguration(EmbeddedDataSourceConfiguration.class)
 			.withPropertyValues("spring.flyway.ignore-migration-patterns=")
 			.run((context) -> assertThat(context.getBean(Flyway.class).getConfiguration().getIgnoreMigrationPatterns())

module/spring-boot-flyway/src/test/java/org/springframework/boot/flyway/autoconfigure/FlywayPropertiesTests.java

@@ -30,6 +30,7 @@
 import org.flywaydb.core.api.configuration.ClassicConfiguration;
 import org.flywaydb.core.api.configuration.Configuration;
 import org.flywaydb.core.api.configuration.FluentConfiguration;
+import org.flywaydb.core.api.pattern.ValidatePattern;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.beans.BeanWrapper;
@@ -95,6 +96,8 @@ void defaultValuesAreConsistent() {
 		assertThat(properties.getScriptPlaceholderSuffix()).isEqualTo(configuration.getScriptPlaceholderSuffix());
 		assertThat(properties.isExecuteInTransaction()).isEqualTo(configuration.isExecuteInTransaction());
 		assertThat(properties.getCommunityDbSupportEnabled()).isNull();
+		assertThat(configuration.getIgnoreMigrationPatterns()).extracting(Object::toString)
+			.isEqualTo(properties.getIgnoreMigrationPatterns());
 	}
 
 	@Test