Polishing

junit-platform-launcher/src/main/java/org/junit/platform/launcher/core/HierarchicalOutputDirectoryProvider.java

@@ -42,12 +42,10 @@ class HierarchicalOutputDirectoryProvider implements OutputDirectoryProvider {
 	@Override
 	public Path createOutputDirectory(TestDescriptor testDescriptor) throws IOException {
 		List<Segment> segments = testDescriptor.getUniqueId().getSegments();
-		Segment firstSegment = segments.get(0);
 		Path relativePath = segments.stream() //
 				.skip(1) //
-				.map(Segment::getValue) //
-				.map(HierarchicalOutputDirectoryProvider::sanitizeName).map(Paths::get) //
-				.reduce(Paths.get(sanitizeName(firstSegment.getValue())), Path::resolve);
+				.map(HierarchicalOutputDirectoryProvider::toSanitizedPath) //
+				.reduce(toSanitizedPath(segments.get(0)), Path::resolve);
 		return Files.createDirectories(getRootDirectory().resolve(relativePath));
 	}
 
@@ -59,6 +57,10 @@ public synchronized Path getRootDirectory() {
 		return rootDir;
 	}
 
+	private static Path toSanitizedPath(Segment segment) {
+		return Paths.get(sanitizeName(segment.getValue()));
+	}
+
 	private static String sanitizeName(String value) {
 		StringBuilder result = new StringBuilder(value.length());
 		for (int i = 0; i < value.length(); i++) {