PHPUnit Email Testing Guide

Prerequisites

• PHP 7.4 or higher
• Composer package manager
• PHPUnit 9.x or higher
• Mail7 account and API credentials

Installation and Setup

1. Install Required Dependencies

composer require --dev phpunit/phpunit
composer require guzzlehttp/guzzle

2. Configure Mail7 API Credentials

Create a .env file in your project root:

MAIL7_API_KEY=your_api_key
MAIL7_API_SECRET=your_api_secret

Writing Your First Email Test

use PHPUnit\Framework\TestCase;
use GuzzleHttp\Client;

class EmailTest extends TestCase
{
    private $mail7Client;
    private $testEmail;

    protected function setUp(): void
    {
        $this->mail7Client = new Client([
            'base_uri' => 'https://api.mail7.io/api/',
            'headers' => [
                'Authorization' => 'Bearer ' . getenv('MAIL7_API_KEY')
            ]
        ]);
        $this->testEmail = 'test-' . uniqid() . '@mail7.io';
    }

    public function testEmailDelivery()
    {
        // Send test email
        $this->sendTestEmail($this->testEmail);

        // Wait for email delivery
        sleep(2);

        // Fetch emails using Mail7 API
        $response = $this->mail7Client->get("inbox/{$this->testEmail}");
        $emails = json_decode($response->getBody(), true);

        $this->assertNotEmpty($emails);
        $this->assertEquals('Test Subject', $emails[0]['subject']);
    }
}

Advanced Testing Scenarios

1. Testing Email Content and HTML

public function testEmailContent()
{
    $email = $this->fetchLatestEmail();
    
    $this->assertStringContainsString('Welcome', $email['text']);
    $this->assertStringContainsString('<h1>Welcome</h1>', $email['html']);
}

2. Testing Email Attachments

public function testEmailAttachments()
{
    $email = $this->fetchLatestEmail();
    
    $this->assertNotEmpty($email['attachments']);
    $this->assertEquals('document.pdf', $email['attachments'][0]['filename']);
}

3. Testing Password Reset Flow

public function testPasswordResetFlow()
{
    // Trigger password reset
    $this->triggerPasswordReset($this->testEmail);
    
    // Fetch reset email
    $email = $this->fetchLatestEmail();
    
    // Extract reset link
    $resetLink = $this->extractResetLink($email['text']);
    
    $this->assertStringContainsString('reset-password', $resetLink);
}

Best Practices

1. Test Data Management

• Use unique email addresses for each test
• Clean up test data in tearDown()
• Implement proper wait times for email delivery

2. Error Handling

public function testEmailDeliveryWithRetry()
{
    $maxRetries = 3;
    $attempt = 0;
    
    while ($attempt < $maxRetries) {
        try {
            $email = $this->fetchLatestEmail();
            $this->assertNotNull($email);
            return;
        } catch (Exception $e) {
            $attempt++;
            sleep(2);
        }
    }
    
    $this->fail('Email not received after ' . $maxRetries . ' attempts');
}

3. Test Organization

• Group related tests using test suites
• Use data providers for testing multiple scenarios
• Implement proper test isolation

Common Pitfalls and Solutions

• Race Conditions: Implement proper wait times between email operations
• Test Data Pollution: Use unique identifiers for test emails
• API Rate Limiting: Implement proper retry mechanisms
• False Positives: Ensure proper test isolation and cleanup

Debugging Tips

• Enable PHPUnit's verbose output for detailed test information
• Use Mail7's web interface to manually verify email delivery
• Implement comprehensive logging in your test suite
• Use PHPUnit's --debug flag for additional debugging information

Introduction

This guide will help you understand how to implement effective PHPUnit Email Testing Guide in your applications using Mail7's robust testing infrastructure.

Getting Started

To get started with PHPUnit Email Testing Guide, you'll need:

• A Mail7 account
• Basic understanding of email testing concepts
• Your development environment set up

Implementation Guide

Follow these steps to implement PHPUnit Email Testing Guide in your project:

1. Set up your Mail7 account and get your API credentials
2. Install necessary dependencies for your testing framework
3. Create test cases using Mail7's API
4. Run and verify your tests

Best Practices

• Always use unique test email addresses
• Clean up test data after your tests
• Implement proper error handling
• Use Mail7's API efficiently

Start Testing Now

Ready to implement PHPUnit Email Testing Guide in your application? Get started with Mail7 today: