create email and emailer with tests

src/Email/Email.php

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+<?php
+
+namespace FreightQuote\Email;
+
+class Email
+{
+    private array $recipients = [];
+    private array $cc = [];
+    private array $bcc = [];
+    private string $subject = '';
+    private string $body = '';
+    private array $fileAttachments = [];
+
+    public function addRecipient(string $email): void
+    {
+        $this->recipients[] = $email;
+    }
+
+    public function getRecipients(): array
+    {
+        return $this->recipients;
+    }
+
+    public function addCC(string $email): void
+    {
+        $this->cc[] = $email;
+    }
+
+    public function getCC(): array
+    {
+        return $this->cc;
+    }
+
+    public function addBCC(string $email): void
+    {
+        $this->bcc[] = $email;
+    }
+
+    public function getBCC(): array
+    {
+        return $this->bcc;
+    }
+
+    public function setSubject(string $subject): void
+    {
+        $this->subject = $subject;
+    }
+
+    public function getSubject(): string
+    {
+        return $this->subject;
+    }
+
+    public function setBody(string $body): void
+    {
+        $this->body = $body;
+    }
+
+    public function getBody(): string
+    {
+        return $this->body;
+    }
+
+    public function addAttachment(string $path): void
+    {
+        $this->fileAttachments[] = $path;
+    }
+
+    public function getAttachments(): array
+    {
+        return $this->fileAttachments;
+    }
+}

src/Email/Emailer.php

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+<?php
+
+namespace FreightQuote\Email;
+
+
+
+interface Emailer
+{
+    public function send(Email $email): bool;
+}

tests/Fakes/Email/FakeEmailer.php

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+<?php
+
+namespace Tests\Fakes\Email;
+
+use FreightQuote\Email\Email;
+use FreightQuote\Email\Emailer;
+
+class FakeEmailer implements Emailer
+{
+    private int $sentEmailCount = 0;
+
+    public function getSentEmailCount(): int
+    {
+        return $this->sentEmailCount;
+    }
+
+    public function send(Email $email): bool
+    {
+        if (count($email->getRecipients()) > 0) {
+            $this->sentEmailCount++;
+
+            return true;
+        }
+
+        return false;
+    }
+}

tests/Unit/Email/EmailTest.php

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+<?php
+
+namespace Tests\Unit\Email;
+
+use PHPUnit\Framework\TestCase;
+use FreightQuote\Email\Email;
+
+class EmailTest extends TestCase
+{
+    private Email $email;
+
+    public function setUp(): void
+    {
+        $this->email = new Email();
+    }
+
+    public function test_email_recipients(): void
+    {
+        $emailAddress = 'test@email.com';
+        $this->email->addRecipient($emailAddress);
+        $this->assertEquals([$emailAddress], $this->email->getRecipients());
+    }
+
+    public function test_email_cc(): void
+    {
+        $emailAddress = 'test@email.com';
+        $this->email->addCC($emailAddress);
+        $this->assertEquals([$emailAddress], $this->email->getCC());
+    }
+
+    public function test_email_bcc(): void
+    {
+        $emailAddress = 'test@email.com';
+        $this->email->addBCC($emailAddress);
+        $this->assertEquals([$emailAddress], $this->email->getBCC());
+    }
+
+    public function test_email_subject(): void
+    {
+        $subject = 'test subject';
+        $this->email->setSubject($subject);
+        $this->assertEquals($subject, $this->email->getSubject());
+    }
+
+    public function test_email_body(): void
+    {
+        $body = 'test body';
+        $this->email->setBody($body);
+        $this->assertEquals($body, $this->email->getBody());
+    }
+
+    public function test_email_attachments(): void
+    {
+        $path = '/path/to/file';
+        $this->email->addAttachment($path);
+        $this->assertEquals([$path], $this->email->getAttachments());
+    }
+}