PHPLIB-1338 Add tests on $size Array Query Operators

generator/config/query/size.yaml

@@ -11,3 +11,12 @@ arguments:
         name: value
         type:
             - int
+tests:
+    -
+        name: 'Query an Array by Array Length'
+        link: 'https://www.mongodb.com/docs/manual/tutorial/query-arrays/#query-an-array-by-array-length'
+        pipeline:
+            -
+                $match:
+                    tags:
+                        $size: 3

tests/Builder/Query/SizeOperatorTest.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MongoDB\Tests\Builder\Query;
+
+use MongoDB\Builder\Pipeline;
+use MongoDB\Builder\Query;
+use MongoDB\Builder\Stage;
+use MongoDB\Tests\Builder\PipelineTestCase;
+
+/**
+ * Test $size query
+ */
+class SizeOperatorTest extends PipelineTestCase
+{
+    public function testQueryAnArrayByArrayLength(): void
+    {
+        $pipeline = new Pipeline(
+            Stage::match(
+                tags: Query::size(3),
+            ),
+        );
+
+        $this->assertSamePipeline(Pipelines::SizeQueryAnArrayByArrayLength, $pipeline);
+    }
+}