added tests for inline elements

tests/InlineElementsTest.php

@@ -0,0 +1,19 @@
+<?php declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+final class InlineElementsTest extends TestCase {
+	public function testBoldParsesCorrectly() : void {
+		$source = "
+		
+		Lorem **ipsum** dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor.
+
+		";
+		$target = "
+		<p>Lorem <b>ipsum</b> dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor.</p>
+		";
+
+		[$source, $result] = createTest($source, $target);
+		$this->assertEquals($source, $result);
+	}
+}