Implement include and exclude filtering when calling registerAutoDetectedExtensions in MutableExtensionRegistry

junit-jupiter-engine/src/main/java/org/junit/jupiter/engine/Constants.java

@@ -163,6 +163,15 @@ public final class Constants {
 	 */
 	public static final String DEACTIVATE_ALL_CONDITIONS_PATTERN = ClassNamePatternFilterUtils.ALL_PATTERN;
 
+	/**
+	 * A blank pattern used for class name filtering: {@value}
+	 *
+	 * <p>This constant is used to represent an empty or blank pattern in class name filtering operations.
+	 *
+	 * @see ClassNamePatternFilterUtils#BLANK
+	 */
+	public static final String BLANK = ClassNamePatternFilterUtils.BLANK;
+
 	/**
 	 * Property name used to set the default display name generator class name: {@value}
 	 *

junit-jupiter-engine/src/main/java/org/junit/jupiter/engine/config/CachingJupiterConfiguration.java

@@ -26,6 +26,7 @@
 import org.junit.jupiter.api.MethodOrderer;
 import org.junit.jupiter.api.TestInstance;
 import org.junit.jupiter.api.extension.ExecutionCondition;
+import org.junit.jupiter.api.extension.Extension;
 import org.junit.jupiter.api.extension.TestInstantiationAwareExtension.ExtensionContextScope;
 import org.junit.jupiter.api.io.CleanupMode;
 import org.junit.jupiter.api.io.TempDirFactory;
@@ -47,13 +48,8 @@ public CachingJupiterConfiguration(JupiterConfiguration delegate) {
 	}
 
 	@Override
-	public Optional<String> getExtensionAutodetectionIncludePattern() {
-		return delegate.getExtensionAutodetectionIncludePattern();
-	}
-
-	@Override
-	public Optional<String> getExtensionAutodetectionExcludePattern() {
-		return delegate.getExtensionAutodetectionExcludePattern();
+	public Predicate<Class<? extends Extension>> createExtensionFilterByPatterns() {
+		return delegate.createExtensionFilterByPatterns();
 	}
 
 	@Override

junit-jupiter-engine/src/main/java/org/junit/jupiter/engine/config/DefaultJupiterConfiguration.java

@@ -26,6 +26,7 @@
 import org.junit.jupiter.api.MethodOrderer;
 import org.junit.jupiter.api.TestInstance.Lifecycle;
 import org.junit.jupiter.api.extension.ExecutionCondition;
+import org.junit.jupiter.api.extension.Extension;
 import org.junit.jupiter.api.extension.TestInstantiationAwareExtension.ExtensionContextScope;
 import org.junit.jupiter.api.io.CleanupMode;
 import org.junit.jupiter.api.io.TempDirFactory;
@@ -74,12 +75,19 @@ public DefaultJupiterConfiguration(ConfigurationParameters configurationParamete
 	}
 
 	@Override
-	public Optional<String> getExtensionAutodetectionIncludePattern() {
+	public Predicate<Class<? extends Extension>> createExtensionFilterByPatterns() {
+		Predicate<String> predicate = ClassNamePatternFilterUtils.includeMatchingClassNames(
+			getExtensionAutodetectionIncludePattern().orElse(ClassNamePatternFilterUtils.ALL_PATTERN)) //
+				.and(ClassNamePatternFilterUtils.excludeMatchingClassNames(
+					getExtensionAutodetectionExcludePattern().orElse(ClassNamePatternFilterUtils.BLANK)));
+		return clazz -> predicate.test(clazz.getName());
+	}
+
+	private Optional<String> getExtensionAutodetectionIncludePattern() {
 		return configurationParameters.get(EXTENSIONS_AUTODETECTION_INCLUDE_PROPERTY_NAME);
 	}
 
-	@Override
-	public Optional<String> getExtensionAutodetectionExcludePattern() {
+	private Optional<String> getExtensionAutodetectionExcludePattern() {
 		return configurationParameters.get(EXTENSIONS_AUTODETECTION_EXCLUDE_PROPERTY_NAME);
 	}
 

junit-jupiter-engine/src/main/java/org/junit/jupiter/engine/config/JupiterConfiguration.java

@@ -23,6 +23,7 @@
 import org.junit.jupiter.api.MethodOrderer;
 import org.junit.jupiter.api.TestInstance;
 import org.junit.jupiter.api.extension.ExecutionCondition;
+import org.junit.jupiter.api.extension.Extension;
 import org.junit.jupiter.api.extension.PreInterruptCallback;
 import org.junit.jupiter.api.extension.TestInstantiationAwareExtension.ExtensionContextScope;
 import org.junit.jupiter.api.io.CleanupMode;
@@ -50,9 +51,7 @@ public interface JupiterConfiguration {
 	String DEFAULT_TEST_CLASS_ORDER_PROPERTY_NAME = ClassOrderer.DEFAULT_ORDER_PROPERTY_NAME;;
 	String DEFAULT_TEST_INSTANTIATION_EXTENSION_CONTEXT_SCOPE_PROPERTY_NAME = ExtensionContextScope.DEFAULT_SCOPE_PROPERTY_NAME;
 
-	Optional<String> getExtensionAutodetectionIncludePattern();
-
-	Optional<String> getExtensionAutodetectionExcludePattern();
+	Predicate<Class<? extends Extension>> createExtensionFilterByPatterns();
 
 	Optional<String> getRawConfigurationParameter(String key);
 

junit-jupiter-engine/src/main/java/org/junit/jupiter/engine/extension/MutableExtensionRegistry.java

@@ -38,7 +38,6 @@
 import org.junit.platform.commons.logging.LoggerFactory;
 import org.junit.platform.commons.support.ReflectionSupport;
 import org.junit.platform.commons.util.ClassLoaderUtils;
-import org.junit.platform.commons.util.ClassNamePatternFilterUtils;
 import org.junit.platform.commons.util.Preconditions;
 import org.junit.platform.commons.util.ServiceLoaderUtils;
 
@@ -98,23 +97,14 @@ public static MutableExtensionRegistry createRegistryWithDefaultExtensions(Jupit
 
 	private static void registerAutoDetectedExtensions(MutableExtensionRegistry extensionRegistry,
 			JupiterConfiguration configuration) {
-		Predicate<Class<? extends Extension>> filter = createExtensionFilterByPatterns(
-			configuration.getExtensionAutodetectionIncludePattern().orElse(ClassNamePatternFilterUtils.ALL_PATTERN),
-			configuration.getExtensionAutodetectionExcludePattern().orElse(""));
+		Predicate<Class<? extends Extension>> filter = configuration.createExtensionFilterByPatterns();
 
 		ServiceLoader<Extension> serviceLoader = ServiceLoader.load(Extension.class,
 			ClassLoaderUtils.getDefaultClassLoader());
 		ServiceLoaderUtils.filter(serviceLoader, filter) //
 				.forEach(extensionRegistry::registerAutoDetectedExtension);
 	}
 
-	private static Predicate<Class<? extends Extension>> createExtensionFilterByPatterns(String include,
-			String exclude) {
-		Predicate<String> predicate = ClassNamePatternFilterUtils.includeMatchingClassNames(include) //
-				.and(ClassNamePatternFilterUtils.excludeMatchingClassNames(exclude));
-		return clazz -> predicate.test(clazz.getName());
-	}
-
 	/**
 	 * Factory for creating and populating a new registry from a list of
 	 * extension types and a parent registry.

junit-platform-commons/src/main/java/org/junit/platform/commons/util/ClassNamePatternFilterUtils.java

@@ -43,6 +43,8 @@ private ClassNamePatternFilterUtils() {
 
 	public static final String ALL_PATTERN = "*";
 
+	public static final String BLANK = "";
+
 	/**
 	 * Create a {@link Predicate} that can be used to exclude (i.e., filter out)
 	 * objects of type {@code T} whose fully qualified class names match any of

jupiter-tests/src/test/java/org/junit/jupiter/engine/extension/ExtensionRegistryTests.java

@@ -60,6 +60,7 @@ void newRegistryWithoutParentHasDefaultExtensions() {
 	void newRegistryWithoutParentHasDefaultExtensionsPlusAutodetectedExtensionsLoadedViaServiceLoader() {
 
 		when(configuration.isExtensionAutoDetectionEnabled()).thenReturn(true);
+		when(configuration.createExtensionFilterByPatterns()).thenReturn(__ -> true);
 		registry = createRegistryWithDefaultExtensions(configuration);
 
 		List<Extension> extensions = registry.getExtensions(Extension.class);