###############################################################################
#
# Tests for XlsxWriter.
#
# SPDX-License-Identifier: BSD-2-Clause
#
# Copyright (c), 2013-2025, John McNamara, jmcnamara@cpan.org
#

import unittest
from io import StringIO

from ...worksheet import Worksheet


class TestWriteHeaderFooter(unittest.TestCase):
    """
    Test the Worksheet _write_header_footer() method.

    """

    def setUp(self):
        self.fh = StringIO()
        self.worksheet = Worksheet()
        self.worksheet._set_filehandle(self.fh)

    def test_write_header_footer_header_only(self):
        """Test the _write_header_footer() method header only"""

        self.worksheet.set_header("Page &P of &N")
        self.worksheet._write_header_footer()

        exp = """<headerFooter><oddHeader>Page &amp;P of &amp;N</oddHeader></headerFooter>"""
        got = self.fh.getvalue()

        self.assertEqual(got, exp)

    def test_write_header_footer_footer_only(self):
        """Test the _write_header_footer() method footer only"""

        self.worksheet.set_footer("&F")
        self.worksheet._write_header_footer()

        exp = """<headerFooter><oddFooter>&amp;F</oddFooter></headerFooter>"""
        got = self.fh.getvalue()

        self.assertEqual(got, exp)

    def test_write_header_footer_both(self):
        """Test the _write_header_footer() method header and footer"""

        self.worksheet.set_header("Page &P of &N")
        self.worksheet.set_footer("&F")
        self.worksheet._write_header_footer()

        exp = """<headerFooter><oddHeader>Page &amp;P of &amp;N</oddHeader><oddFooter>&amp;F</oddFooter></headerFooter>"""
        got = self.fh.getvalue()

        self.assertEqual(got, exp)
