check duplicate collection rules

tests/unit/General/CollectionsTest.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Appwrite\Tests;
+
+use PHPUnit\Framework\TestCase;
+
+class CollectionsTest extends TestCase
+{
+    protected $collections;
+
+    public function setUp(): void
+    {
+        $this->collections = require('app/config/collections.php');
+    }
+
+    public function tearDown(): void
+    {
+    }
+
+    public function testDuplicateRules()
+    {
+        foreach ($this->collections as $collection) {
+            if ($collection['rules']) {
+                foreach ($collection['rules'] as $check) {
+                    $occurences = 0;
+                    foreach ($collection['rules'] as $rule) {
+                        if ($rule['key'] == $check['key']) {
+                            $occurences++;
+                        }
+                    }
+                    $this->assertEquals(1, $occurences);
+                }
+            }
+        }
+    }
+}