first commit

tests/Shared/FlashServiceTest.php

@@ -0,0 +1,42 @@
+<?php
+declare(strict_types=1);
+
+namespace Tests\Shared;
+
+use App\Shared\Http\FlashService;
+use PHPUnit\Framework\TestCase;
+
+final class FlashServiceTest extends TestCase
+{
+    protected function setUp(): void
+    {
+        $_SESSION = [];
+    }
+
+    public function testSetAndGetConsumesFlashMessage(): void
+    {
+        $flash = new FlashService();
+
+        $flash->set('notice', 'Bonjour');
+
+        self::assertSame('Bonjour', $flash->get('notice'));
+        self::assertNull($flash->get('notice'));
+    }
+
+    public function testGetCastsNonStringValueAndRemovesIt(): void
+    {
+        $_SESSION['flash']['count'] = 123;
+
+        $flash = new FlashService();
+
+        self::assertSame('123', $flash->get('count'));
+        self::assertArrayNotHasKey('count', $_SESSION['flash']);
+    }
+
+    public function testGetReturnsNullWhenMissing(): void
+    {
+        $flash = new FlashService();
+
+        self::assertNull($flash->get('missing'));
+    }
+}