AC-949: Create unit test for Magento2\Less\PropertiesSortingSniff check (#37)

https://jira.corp.magento.com/browse/AC-949

Author: magento-engcom-team

Magento2/Tests/Less/PropertiesSortingUnitTest.less

@@ -0,0 +1,28 @@
+// /**
+//  * Copyright © Magento, Inc. All rights reserved.
+//  * See COPYING.txt for license details.
+//  */
+
+.menu {
+  color: white;
+  text-align: center;
+  background-color: red;
+
+  .item {
+    background-color: green;
+    color: white;
+    text-align: center;
+  }
+}
+
+.nav {
+  background-color: green;
+  color: white;
+  text-align: center;
+
+  .item {
+    color: white;
+    text-align: center;
+    background-color: red;
+  }
+}

Magento2/Tests/Less/PropertiesSortingUnitTest.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * Copyright © Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento2\Tests\Less;
+
+class PropertiesSortingUnitTest extends AbstractLessSniffUnitTestCase
+{
+    /**
+     * @inheritdoc
+     */
+    public function getErrorList()
+    {
+        return [
+            9 => 1,
+            26 => 1
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getWarningList()
+    {
+        return [];
+    }
+}