Update PayPal references and tests

tests/Unit/LemonSqueezyClientTest.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Tests\Unit;
+
+use App\Services\LemonSqueezy\LemonSqueezyClient;
+use Illuminate\Support\Facades\Http;
+use Tests\TestCase;
+
+class LemonSqueezyClientTest extends TestCase
+{
+    public function test_base_url_is_normalized_when_missing_scheme(): void
+    {
+        $this->app['config']->set('lemonsqueezy.api_key', 'test-token');
+        $this->app['config']->set('lemonsqueezy.base_url', '/v1');
+
+        Http::fake(function ($request) {
+            $this->assertSame('https://api.lemonsqueezy.com/v1/products', $request->url());
+
+            return Http::response(['data' => []], 200);
+        });
+
+        $client = $this->app->make(LemonSqueezyClient::class);
+        $client->get('/products');
+    }
+
+    public function test_base_url_is_forced_to_api_when_pointing_to_local_host(): void
+    {
+        $this->app['config']->set('lemonsqueezy.api_key', 'test-token');
+        $this->app['config']->set('lemonsqueezy.base_url', 'http://localhost/v1');
+
+        Http::fake(function ($request) {
+            $this->assertSame('https://api.lemonsqueezy.com/v1/products', $request->url());
+
+            return Http::response(['data' => []], 200);
+        });
+
+        $client = $this->app->make(LemonSqueezyClient::class);
+        $client->get('/products');
+    }
+}