Fix MinIO local test storage fallback

services/nginx/app/tests/Unit/Storage/MinioLocalTestStorageTest.php

@@ -0,0 +1,38 @@
+<?php
+
+use classes\pdf_store;
+
+it('falls back to local test storage when MinIO config values are empty', function (): void {
+    global $MINIO;
+
+    $previousRunApiTests = getenv('RUN_API_TESTS');
+    $previousMinio = $MINIO ?? null;
+    putenv('RUN_API_TESTS=1');
+    $MINIO = [
+        'endpoint' => null,
+        'access_key' => null,
+        'secret_key' => null,
+    ];
+
+    try {
+        $file = 'minio-local-test-' . bin2hex(random_bytes(4)) . '.pdf';
+        $store = new pdf_store();
+
+        expect($store->createObject($file, 'local-pdf-content'))->toBeTrue();
+
+        $path = $store->download($file);
+
+        expect(is_file($path))->toBeTrue()
+            ->and(file_get_contents($path))->toBe('local-pdf-content');
+    } finally {
+        if (isset($path) && is_file($path)) {
+            unlink($path);
+        }
+        if ($previousRunApiTests === false) {
+            putenv('RUN_API_TESTS');
+        } else {
+            putenv('RUN_API_TESTS=' . $previousRunApiTests);
+        }
+        $MINIO = $previousMinio;
+    }
+});

services/nginx/app/traits/minio_t.php

@@ -76,7 +76,7 @@ trait minio_t
     public function getEndpoint(): string
     {
         global $MINIO;
-        return $MINIO['endpoint'];
+        return is_array($MINIO ?? null) ? (string)($MINIO['endpoint'] ?? '') : '';
     }
 
     /**
@@ -86,7 +86,7 @@ trait minio_t
     public function getAccessKey(): string
     {
         global $MINIO;
-        return $MINIO['access_key'];
+        return is_array($MINIO ?? null) ? (string)($MINIO['access_key'] ?? '') : '';
     }
 
     /**
@@ -96,7 +96,7 @@ trait minio_t
     public function getSecretKey(): string
     {
         global $MINIO;
-        return $MINIO['secret_key'];
+        return is_array($MINIO ?? null) ? (string)($MINIO['secret_key'] ?? '') : '';
     }
 
     /**