AC-951: Create unit test for Magento2\Less\SelectorDelimiterSniff check (#39)

https://jira.corp.magento.com/browse/AC-951

Author: magento-engcom-team

Magento2/Tests/Less/SelectorDelimiterUnitTest.less

@@ -0,0 +1,13 @@
+// /**
+//  * Copyright © Magento, Inc. All rights reserved.
+//  * See COPYING.txt for license details.
+//  */
+
+.nav,
+.bar {
+  background: green;
+}
+
+.nav, .bar {
+  background: red;
+}

Magento2/Tests/Less/SelectorDelimiterUnitTest.php

@@ -0,0 +1,27 @@
+<?php
+/**
+ * Copyright © Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento2\Tests\Less;
+
+class SelectorDelimiterUnitTest extends AbstractLessSniffUnitTestCase
+{
+    /**
+     * @inheritdoc
+     */
+    public function getErrorList()
+    {
+        return [
+            11 => 1
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getWarningList()
+    {
+        return [];
+    }
+}