test email signup flow

backend/tests/Fakes/FakeEmailer.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace Tests\Fakes;
+
+use App\Email\Emailer;
+use App\Shared\ValueObject\EmailAddress;
+
+class FakeEmailer implements Emailer
+{
+    private int $sendCount = 0;
+
+    private ?EmailAddress $lastRecipient = null;
+
+    private ?string $lastSubject = null;
+
+    private ?string $lastBody = null;
+
+    public function send(
+        EmailAddress $recipient,
+        string $subject,
+        string $body,
+    ): void {
+        $this->sendCount++;
+        $this->lastRecipient = $recipient;
+        $this->lastSubject = $subject;
+        $this->lastBody = $body;
+    }
+
+    public function getSendCount(): int
+    {
+        return $this->sendCount;
+    }
+
+    public function getLastRecipient(): ?EmailAddress
+    {
+        return $this->lastRecipient;
+    }
+
+    public function getLastSubject(): ?string
+    {
+        return $this->lastSubject;
+    }
+
+    public function getLastBody(): ?string
+    {
+        return $this->lastBody;
+    }
+}