Add cover code block encoding edge case in smilies replacement tests

tests/src/Content/SmiliesTest.php

@@ -0,0 +1,69 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: benlo
+ * Date: 25/03/19
+ * Time: 21:36
+ */
+
+namespace Friendica\Test\src\Content;
+
+use Friendica\Content\Smilies;
+use Friendica\Test\MockedTest;
+use Friendica\Test\Util\AppMockTrait;
+use Friendica\Test\Util\L10nMockTrait;
+use Friendica\Test\Util\VFSTrait;
+
+class SmiliesTest extends MockedTest
+{
+	use VFSTrait;
+	use AppMockTrait;
+	use L10nMockTrait;
+
+	protected function setUp()
+	{
+		parent::setUp();
+		$this->setUpVfsDir();
+		$this->mockApp($this->root);
+		$this->app->videowidth = 425;
+		$this->app->videoheight = 350;
+		$this->configMock->shouldReceive('get')
+			->with('system', 'no_smilies')
+			->andReturn(false);
+		$this->configMock->shouldReceive('get')
+			->with(false, 'system', 'no_smilies')
+			->andReturn(false);
+	}
+
+	public function dataLinks()
+	{
+		return [
+			/** @see https://github.com/friendica/friendica/pull/6933 */
+			'bug-6933-1' => [
+				'data' => '<code>/</code>',
+				'smilies' => ['texts' => [], 'icons' => []],
+				'expected' => '<code>/</code>',
+			],
+			'bug-6933-2' => [
+				'data' => '<code>code</code>',
+				'smilies' => ['texts' => [], 'icons' => []],
+				'expected' => '<code>code</code>',
+			],
+		];
+	}
+
+	/**
+	 * Test replace smilies in different texts
+	 * @dataProvider dataLinks
+	 *
+	 * @param string $text     Test string
+	 * @param array  $smilies  List of smilies to replace
+	 * @param string $expected Expected result
+	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+	 */
+	public function testReplaceFromArray($text, $smilies, $expected)
+	{
+		$output = Smilies::replaceFromArray($text, $smilies);
+		$this->assertEquals($expected, $output);
+	}
+}