Automated way to generate the activity logs

Hi,
we have developed a utility which pulls folllowing lead activity from Marketo using SOAP API and send it to our internal system for further processing:

• Sends 
• Opens
• Clicks
• Email Bounces
• Unsubscirbes

We want test he uitlity with more than 50K opens and clicks. Creating campaigns, sending email and then open and click links in email is a time consuming and expensive process. Is there any automated way to generate these activities in Marketo ?

Thanks