71 lines
2.0 KiB
Python
71 lines
2.0 KiB
Python
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"""Test the parser and generator are inverses.
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Note that this is only strictly true if we are parsing RFC valid messages and
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producing RFC valid messages.
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"""
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import io
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import unittest
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from email import policy, message_from_bytes
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from email.message import EmailMessage
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from email.generator import BytesGenerator
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from test.test_email import TestEmailBase, parameterize
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# This is like textwrap.dedent for bytes, except that it uses \r\n for the line
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# separators on the rebuilt string.
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def dedent(bstr):
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lines = bstr.splitlines()
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if not lines[0].strip():
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raise ValueError("First line must contain text")
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stripamt = len(lines[0]) - len(lines[0].lstrip())
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return b'\r\n'.join(
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[x[stripamt:] if len(x)>=stripamt else b''
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for x in lines])
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@parameterize
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class TestInversion(TestEmailBase):
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policy = policy.default
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message = EmailMessage
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def msg_as_input(self, msg):
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m = message_from_bytes(msg, policy=policy.SMTP)
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b = io.BytesIO()
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g = BytesGenerator(b)
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g.flatten(m)
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self.assertEqual(b.getvalue(), msg)
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# XXX: spaces are not preserved correctly here yet in the general case.
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msg_params = {
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'header_with_one_space_body': (dedent(b"""\
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From: abc@xyz.com
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X-Status:\x20
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Subject: test
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foo
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"""),),
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}
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payload_params = {
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'plain_text': dict(payload='This is a test\n'*20),
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'base64_text': dict(payload=(('xy a'*40+'\n')*5), cte='base64'),
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'qp_text': dict(payload=(('xy a'*40+'\n')*5), cte='quoted-printable'),
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}
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def payload_as_body(self, payload, **kw):
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msg = self._make_message()
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msg['From'] = 'foo'
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msg['To'] = 'bar'
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msg['Subject'] = 'payload round trip test'
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msg.set_content(payload, **kw)
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b = bytes(msg)
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msg2 = message_from_bytes(b, policy=self.policy)
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self.assertEqual(bytes(msg2), b)
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self.assertEqual(msg2.get_content(), payload)
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if __name__ == '__main__':
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unittest.main()
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