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The repo had no automated tests, so regressions in the email parsing pipeline could only be caught manually. The reusable ci-python-sam workflow already supports a run-tests input at the pinned SHA; enable it and add a first suite covering the pure functions pad_zip and parse_raw_email. tests/conftest.py sets AWS_DEFAULT_REGION and dummy credentials before any handler import because the handlers create boto3 clients at module import time, and loads each handler.py via importlib under a unique module name since the files share a basename. pytest.ini scopes discovery to tests/ so the manual test_local.py script at the repo root is not collected.
91 lines
2.6 KiB
Python
91 lines
2.6 KiB
Python
"""Tests for parse_raw_email in the PO and WO email processors.
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Synthetic MIME messages are built with email.message.EmailMessage so the
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tests exercise real multipart parsing without shipping .eml fixtures.
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"""
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from email.message import EmailMessage
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SUBJECT = "Amazon.com Services LLC Purchase Order 2D-18206023"
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SENDER = "do_not_reply@coupahost.com"
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TO = "orders@seahavenind.com"
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CC = "ap@seahavenind.com"
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DATE = "Tue, 14 Jul 2026 09:30:00 -0400"
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PLAIN_BODY = "PO 2D-18206023 issued to Sea Haven Industries."
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HTML_BODY = "<html><body><p>PO 2D-18206023 issued.</p></body></html>"
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def _base_message():
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msg = EmailMessage()
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msg["Subject"] = SUBJECT
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msg["From"] = SENDER
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msg["To"] = TO
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msg["Cc"] = CC
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msg["Date"] = DATE
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return msg
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def make_plain_email():
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msg = _base_message()
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msg.set_content(PLAIN_BODY)
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return msg.as_bytes()
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def make_multipart_alternative_email():
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msg = _base_message()
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msg.set_content(PLAIN_BODY)
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msg.add_alternative(HTML_BODY, subtype="html")
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return msg.as_bytes()
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def make_multipart_html_only_email():
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msg = _base_message()
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msg.set_content(HTML_BODY, subtype="html")
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# An attachment forces the message to multipart/mixed
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msg.add_attachment(
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b"%PDF-1.4 fake",
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maintype="application",
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subtype="pdf",
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filename="po.pdf",
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)
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return msg.as_bytes()
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def test_headers_extracted(email_handler):
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result = email_handler.parse_raw_email(make_plain_email())
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assert result["subject"] == SUBJECT
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assert result["sender"] == SENDER
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assert result["to"] == TO
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assert result["date"] == DATE
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def test_simple_plain_body(email_handler):
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result = email_handler.parse_raw_email(make_plain_email())
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assert result["body"].strip() == PLAIN_BODY
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def test_multipart_prefers_text_plain(email_handler):
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result = email_handler.parse_raw_email(make_multipart_alternative_email())
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assert result["body"].strip() == PLAIN_BODY
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assert "<html>" not in result["body"]
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def test_multipart_falls_back_to_html(email_handler):
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result = email_handler.parse_raw_email(make_multipart_html_only_email())
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assert "PO 2D-18206023 issued." in result["body"]
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assert "<html>" in result["body"]
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def test_wo_handler_extracts_cc(wo_handler):
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result = wo_handler.parse_raw_email(make_plain_email())
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assert result["cc"] == CC
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def test_missing_headers_default_to_empty(email_handler):
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msg = EmailMessage()
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msg.set_content(PLAIN_BODY)
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result = email_handler.parse_raw_email(msg.as_bytes())
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assert result["subject"] == ""
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assert result["sender"] == ""
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assert result["to"] == ""
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