email test using py.test

test_email_queue.py

def test_sendmail(monkeypatch):
	emails = []

	def mock_sendmail(self, from_addr, to_addrs, msg, mail_options=(), rcpt_options=()):
		emails.append(dict(from_addr=from_addr, to_addrs=to_addrs, msg=msg))

	monkeypatch.setattr(smtplib.SMTP, "sendmail", mock_sendmail)

	frappe.sendmail(
		recipients=['test@example.com'],
		sender='noreply@example.com',
		subject='Test Mail',
		message='Dear Test, welcome!',
		delayed=False)

	assert len(emails) == 1
	email = emails[0]
	assert email['from_addr'] == 'noreply@example.com'
	assert email['to_addrs'] == ['test@example.com']