def METHOD_NAME(self):
    """Check a list of e-mail addresses is sepearted correctly."""
    # value is one long string not 3 sepearte values, prepare_addresses
    # should convert it to a list.
    value = (
        "\"Doe, John\" <doe.john@sub.example.com>;"
        "\"John Smith\" <john.smith@sub.example.com>,"
        "admin@sub.example.com"
    )
    expected_output = [
        "doe.john@sub.example.com",
        "john.smith@sub.example.com",
        "admin@sub.example.com",
    ]
    output = prepare_addresses(value, usage="envelope")
    self.assertEqual(output, expected_output)