TASK: Readd unit test for sort operation

was previously removed via neos#5036

Neos.Neos/Tests/Unit/FlowQueryOperations/SortOperationTest.php

@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Neos\Neos\Tests\Unit\FlowQueryOperations;
+
+use Neos\ContentRepository\NodeAccess\FlowQueryOperations\SortOperation;
+use Neos\Eel\FlowQuery\FlowQueryException;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * SortOperation test
+ */
+class SortOperationTest extends TestCase
+{
+    /**
+     * @test+
+     */
+    public function callWithoutArgumentsCausesException()
+    {
+        $this->expectException(FlowQueryException::class);
+        $flowQuery = new \Neos\Eel\FlowQuery\FlowQuery([]);
+        $operation = new SortOperation();
+        $operation->evaluate($flowQuery, []);
+    }
+
+    /**
+     * @test
+     */
+    public function invalidSortDirectionCausesException()
+    {
+        $this->expectException(FlowQueryException::class);
+        $flowQuery = new \Neos\Eel\FlowQuery\FlowQuery([]);
+        $operation = new SortOperation();
+        $operation->evaluate($flowQuery, ['title', 'FOO']);
+    }
+
+    /**
+     * @test
+     */
+    public function invalidSortOptionCausesException()
+    {
+        $this->expectException(FlowQueryException::class);
+        $flowQuery = new \Neos\Eel\FlowQuery\FlowQuery([]);
+        $operation = new SortOperation();
+        $operation->evaluate($flowQuery, ['title', 'ASC', 'SORT_BAR']);
+    }
+}