added test for list elements

tests/ListsTest.php

@@ -0,0 +1,32 @@
+<?php declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+final class ListsTest extends TestCase {
+	public function testUnorderedListsParseCorrectly() : void {
+		$source = "
+
+* Listpoint A
+* Listpoint B
+	* Subpoint B1
+	* Subpoint B2
+* Listpoint C
+
+		";
+		$target = "
+<ul>
+	<li> Listpoint A</li>
+	<li>
+		Listpoint B
+		<ul>
+			<li> Subpoint B1</li>
+			<li> Subpoint B2</li>
+		</ul>
+	</li>
+	<li> Listpoint C</li>
+</ul>
+		";
+		[$source, $result] = createTest($source, $target);
+		$this->assertEquals($source, $result);
+	}
+}