chore: Add tests for the PHPMongoQuery class

It appears that it does not match Mongo current documentation exactly so
 we should look into adapting it. Having equality autodetect regex is a
 bit weird.

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

apps/webhooks/tests/Service/PHPMongoQueryTest.php

@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Webhooks\Tests\Db;
+
+use OCA\Webhooks\Service\PHPMongoQuery;
+use OCP\Files\Events\Node\NodeWrittenEvent;
+use Test\TestCase;
+
+class PHPMongoQueryTest extends TestCase {
+	private function dataExecuteQuery() {
+		$event = [
+			'event' => [
+				'class' => NodeWrittenEvent::class,
+				'node' => [
+					'id' => 23,
+					'path' => '/tmp/file.txt',
+				],
+			],
+			'user' => [
+				'uid' => 'bob',
+			],
+		];
+		return [
+			[[], [], true],
+			[[], $event, true],
+			[['event.class' => NodeWrittenEvent::class], $event, true],
+			[['event.class' => NodeWrittenEvent::class, 'user.uid' => 'bob'], $event, true],
+			[['event.node.path' => '/.txt$/'], $event, true],
+			[['event.node.id' => ['$gte' => 22]], $event, true],
+			[['event.class' => 'SomethingElse'], $event, false],
+		];
+	}
+
+	/**
+	 * @dataProvider dataExecuteQuery
+	 */
+	public function testExecuteQuery(array $query, array $document, bool $matches) {
+		$this->assertEquals($matches, PHPMongoQuery::executeQuery($query, $document));
+	}
+}