SimpleDisplayNameGeneratorWithTags.java

import java.lang.reflect.Method;
import java.util.stream.Collectors;

import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.Tag;
import org.junit.platform.commons.util.AnnotationUtils;

final class SimpleDisplayNameGeneratorWithTags extends DisplayNameGenerator.Simple {

	@Override
	public String generateDisplayNameForMethod(Class<?> testClass, Method testMethod) {

		var displayNameForMethod = super.generateDisplayNameForMethod(testClass, testMethod);
		var tags = AnnotationUtils.findRepeatableAnnotations(testMethod, Tag.class);
		if (tags.isEmpty()) {
			return displayNameForMethod;
		}

		return tags.stream().map(Tag::value).collect(Collectors.joining(", ", "", ": " + displayNameForMethod));
	}
}