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Mock smtplib to Test Patch Email Series in Python

Simulate sending a numbered series of patch emails with smtplib and verify the calls using unittest.mock without a real mail server.

smtplib unittest.mock email
Python 
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from unittest.mock import patch, Mock

def send_patch_series(subject_prefix, patches, smtp_host="localhost", smtp_port=25):
    """Simulate sending a series of patch emails."""
    for i, patch_content in enumerate(patch…
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