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import re
import builtins
import datetime
import unittest
from unittest import mock

from qrcode.release import update_manpage

OPEN = f"{builtins.__name__}.open"
DATA = 'test\n.TH "date" "version" "description"\nthis'


class UpdateManpageTests(unittest.TestCase):
    @mock.patch(OPEN, new_callable=mock.mock_open, read_data=".TH invalid")
    def test_invalid_data(self, mock_file):
        update_manpage({"name": "qrcode", "new_version": "1.23"})
        mock_file.assert_called()
        mock_file().write.assert_not_called()

    @mock.patch(OPEN, new_callable=mock.mock_open, read_data=DATA)
    def test_not_qrcode(self, mock_file):
        update_manpage({"name": "not-qrcode"})
        mock_file.assert_not_called()

    @mock.patch(OPEN, new_callable=mock.mock_open, read_data=DATA)
    def test_no_change(self, mock_file):
        update_manpage({"name": "qrcode", "new_version": "version"})
        mock_file.assert_called()
        mock_file().write.assert_not_called()

    @mock.patch(OPEN, new_callable=mock.mock_open, read_data=DATA)
    def test_change(self, mock_file):
        update_manpage({"name": "qrcode", "new_version": "3.11"})
        expected = re.split(r"([^\n]*(?:\n|$))", DATA)[1::2]
        expected[1] = (
            expected[1]
            .replace("version", "3.11")
            .replace("date", datetime.datetime.now().strftime("%-d %b %Y"))
        )
        mock_file().write.has_calls([mock.call(line) for line in expected])