AC-940: Create unit test for Magento2\Less\BracesFormattingSniff check

Magento2/Tests/Less/BracesFormattingUnitTest.less

@@ -0,0 +1,16 @@
+// /**
+//  * Copyright © Magento, Inc. All rights reserved.
+//  * See COPYING.txt for license details.
+//  */
+
+.my{
+  some: 'stuff';
+}
+.foo {
+  anything: 'else';
+}
+
+.bar {
+  #bar .baz();
+
+}

Magento2/Tests/Less/BracesFormattingUnitTest.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * Copyright © Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento2\Tests\Less;
+
+class BracesFormattingUnitTest extends AbstractLessSniffUnitTestCase
+{
+    /**
+     * @inheritdoc
+     */
+    public function getErrorList()
+    {
+        return [
+            6 => 1,
+            16 => 1,
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getWarningList()
+    {
+        return [];
+    }
+}