feat: mailing to filtered teamer list

addresses #869dv9bur

tests/Service/Teamer/TeamerMailingDraftHandlerTest.php

@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Service\Teamer;
+
+use App\Model\TeamerMailingDto;
+use App\Service\Teamer\TeamerMailingDraftHandler;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\HttpFoundation\Session\Session;
+use Symfony\Component\HttpFoundation\Session\Storage\MockArraySessionStorage;
+
+class TeamerMailingDraftHandlerTest extends TestCase
+{
+    private TeamerMailingDraftHandler $handler;
+
+    protected function setUp(): void
+    {
+        $request = new Request();
+        $request->setSession(new Session(new MockArraySessionStorage()));
+
+        $requestStack = new RequestStack();
+        $requestStack->push($request);
+
+        $this->handler = new TeamerMailingDraftHandler($requestStack);
+    }
+
+    public function testANewMailingOpensWithTheGreeting(): void
+    {
+        $draft = $this->handler->getDraft();
+
+        $this->assertNull($draft->getSubject());
+        $this->assertSame(TeamerMailingDraftHandler::NEW_MESSAGE, $draft->getMessage());
+    }
+
+    public function testSavedDraftSurvivesUntilItIsReset(): void
+    {
+        $this->handler->saveDraft(
+            (new TeamerMailingDto())
+                ->setSubject('Wintersaison {{vorname}}')
+                ->setMessage("Hallo {{vorname}},\n\nzweite Zeile.")
+        );
+
+        $draft = $this->handler->getDraft();
+
+        $this->assertSame('Wintersaison {{vorname}}', $draft->getSubject());
+        $this->assertSame("Hallo {{vorname}},\n\nzweite Zeile.", $draft->getMessage());
+
+        $this->handler->resetDraft();
+
+        // discarding brings back the starting point of a new mailing, not a blank page
+        $this->assertNull($this->handler->getDraft()->getSubject());
+        $this->assertSame(TeamerMailingDraftHandler::NEW_MESSAGE, $this->handler->getDraft()->getMessage());
+        $this->assertFalse($this->handler->hasDraft());
+    }
+
+    public function testAHalfWrittenDraftIsKeptAsItIs(): void
+    {
+        $this->handler->saveDraft((new TeamerMailingDto())->setSubject('nur ein Betreff'));
+
+        $draft = $this->handler->getDraft();
+
+        // an emptied message stays empty, the greeting is only the starting point
+        $this->assertSame('nur ein Betreff', $draft->getSubject());
+        $this->assertNull($draft->getMessage());
+        $this->assertTrue($this->handler->hasDraft());
+    }
+}