diff --git a/src/Assembly.php b/src/Assembly.php
index 7ce7953..3e3c5ac 100644
--- a/src/Assembly.php
+++ b/src/Assembly.php
@@ -33,6 +33,17 @@ public function remove(string $path):void {
 		$this->pathList = array_values($this->pathList);
 	}
 
+	public function containsDistinctFile():bool {
+		foreach($this->pathList as $path) {
+			$fileName = pathinfo($path, PATHINFO_FILENAME);
+			if($fileName[0] !== "_") {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
 	public function current():string {
 		return $this->pathList[$this->iteratorIndex];
 	}
diff --git a/test/phpunit/AssemblyTest.php b/test/phpunit/AssemblyTest.php
index be64fe7..cbebc4d 100644
--- a/test/phpunit/AssemblyTest.php
+++ b/test/phpunit/AssemblyTest.php
@@ -65,4 +65,31 @@ public function testIterator():void {
 			self::assertSame($pathList[$i], $path);
 		}
 	}
+
+	public function testContainsDistincFile_allMagic():void {
+		$pathList = [
+			"/var/www/_header.html",
+			"/var/www/_footer.html",
+		];
+		$sut = new Assembly();
+		foreach($pathList as $path) {
+			$sut->add($path);
+		}
+
+		self::assertFalse($sut->containsDistinctFile());
+	}
+
+	public function testContainsDistinctFile():void {
+		$pathList = [
+			"/var/www/_header.html",
+			"/var/www/index.html",
+			"/var/www/_footer.html",
+		];
+		$sut = new Assembly();
+		foreach($pathList as $path) {
+			$sut->add($path);
+		}
+
+		self::assertTrue($sut->containsDistinctFile());
+	}
 }
diff --git a/test/phpunit/phpunit.xml b/test/phpunit/phpunit.xml
index cf95bea..ff2e2a2 100644
--- a/test/phpunit/phpunit.xml
+++ b/test/phpunit/phpunit.xml
@@ -15,4 +15,4 @@
 		</testsuite>
 	</testsuites>
 	<logging/>
-</phpunit>
\ No newline at end of file
+</phpunit>