Add unit test for currency endpoint

app/Http/Controllers/Api/V1/CurrencyController.php

@@ -6,6 +6,7 @@ namespace App\Http\Controllers\Api\V1;
 
 use App\Http\Controllers\Controller;
 use App\Service\CurrencyService;
+use Brick\Money\Currency;
 use Brick\Money\ISOCurrencyProvider;
 use Illuminate\Http\JsonResponse;
 
@@ -23,7 +24,7 @@ class CurrencyController extends Controller
         $currencyService = app(CurrencyService::class);
 
         $currencies = array_values(array_map(
-            fn ($currency) => [
+            fn (Currency $currency): array => [
                 'code' => $currency->getCurrencyCode(),
                 'name' => $currency->getName(),
                 'symbol' => $currencyService->getCurrencySymbol($currency->getCurrencyCode()),

routes/api.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 use App\Http\Controllers\Api\V1\ApiTokenController;
 use App\Http\Controllers\Api\V1\ChartController;
 use App\Http\Controllers\Api\V1\ClientController;
+use App\Http\Controllers\Api\V1\CurrencyController;
 use App\Http\Controllers\Api\V1\ExportController;
 use App\Http\Controllers\Api\V1\ImportController;
 use App\Http\Controllers\Api\V1\InvitationController;
@@ -173,7 +174,7 @@ Route::prefix('v1')->name('v1.')->group(static function (): void {
         });
     });
 
-    Route::get('/currencies', [\App\Http\Controllers\Api\V1\CurrencyController::class, 'index'])->name('currencies.index');
+    Route::get('/currencies', [CurrencyController::class, 'index'])->name('currencies.index');
 
     // Public routes
     Route::name('public.')->prefix('/public')->group(static function (): void {

tests/Unit/Endpoint/Api/V1/CurrencyEndpointTest.php

@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Unit\Endpoint\Api\V1;
+
+use App\Http\Controllers\Api\V1\CurrencyController;
+use App\Service\CurrencyService;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\UsesClass;
+
+#[CoversClass(CurrencyController::class)]
+#[CoversClass(CurrencyService::class)]
+#[UsesClass(CurrencyController::class)]
+class CurrencyEndpointTest extends ApiEndpointTestAbstract
+{
+    public function test_index_return_list_of_available_currencies_incl_symbol(): void
+    {
+        // Arrange
+
+        // Act
+        $response = $this->getJson(route('api.v1.currencies.index'));
+
+        // Assert
+        $response->assertOk();
+        $response->assertJsonCount(166);
+        $responseObj = collect($response->json());
+        $this->assertSame([
+            'code' => 'EUR',
+            'name' => 'Euro',
+            'symbol' => '€',
+        ], $responseObj->firstWhere('code', '=', 'EUR'));
+    }
+}