Added test for CodeIgniter

Author: ankane

composer.json

@@ -23,6 +23,7 @@
         "php": ">= 8.1"
     },
     "require-dev": {
+        "codeigniter4/framework": "^4",
         "doctrine/dbal": "^4",
         "doctrine/orm": "^3",
         "phpunit/phpunit": "^10",

tests/CodeIgniterTest.php

@@ -0,0 +1,44 @@
+<?php
+
+require_once __DIR__ . '/../vendor/codeigniter4/framework/system/Test/bootstrap.php';
+
+use PHPUnit\Framework\TestCase;
+
+use CodeIgniter\Config\BaseConfig;
+use CodeIgniter\Config\BaseService;
+use CodeIgniter\Config\Factories;
+use CodeIgniter\Database\Config;
+use CodeIgniter\Model;
+use CodeIgniter\Settings\Settings;
+use CodeIgniter\Test\DatabaseTestTrait;
+use Config\Database;
+use Pgvector\Vector;
+
+class ItemModel extends Model
+{
+    protected $table = 'ci_items';
+    protected $allowedFields = ['embedding'];
+}
+
+final class CodeIgniterTest extends TestCase
+{
+    public function testWorks()
+    {
+        $config = [
+            'DSN' => 'Postgre://localhost/pgvector_php_test?charset=utf8',
+        ];
+        $db = Database::connect($config);
+
+        $db->query('CREATE EXTENSION IF NOT EXISTS vector');
+        $db->query('DROP TABLE IF EXISTS ci_items');
+        $db->query('CREATE TABLE IF NOT EXISTS ci_items (id bigserial PRIMARY KEY, embedding vector(3))');
+
+        $itemModel = new ItemModel($db);
+        $itemModel->insert(['embedding' => new Vector([1, 1, 1])], false);
+        $itemModel->insert(['embedding' => new Vector([2, 2, 2])], false);
+        $itemModel->insert(['embedding' => new Vector([1, 1, 2])], false);
+
+        $items = $itemModel->orderBy("embedding <-> '[1,1,1]'")->findAll();
+        $this->assertEquals([1, 3, 2], array_map(fn ($v) => $v['id'], $items));
+    }
+}