#!/usr/bin/python
# Copyright (C) 2019 Jelmer Vernooij
# This file is a part of debmutate.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Tests for lintian brush reformatting tools."""

from . import (
    TestCase,
    TestCaseInTempDir,
    )

from debmutate.reformatting import (
    FormattingUnpreservable,
    check_generated_file,
    check_preserve_formatting,
    edit_formatted_file,
    GeneratedFile,
    )


class CheckPreserveFormattingTests(TestCase):

    def test_formatting_same(self):
        check_preserve_formatting("FOO  ", "FOO  ", 'debian/blah')

    def test_formatting_different(self):
        self.assertRaises(
            FormattingUnpreservable,
            check_preserve_formatting, "FOO ", "FOO  ", 'debian/blah')

    def test_reformatting_allowed(self):
        check_preserve_formatting(
            "FOO  ", "FOO ", 'debian/blah',
            allow_reformatting=True)


class GeneratedFileTests(TestCaseInTempDir):

    def test_generated_control_file(self):
        self.build_tree_contents([
            ('debian/', ),
            ('debian/control.in', """\
Source: blah
""")])
        self.assertRaises(
            GeneratedFile, check_generated_file, 'debian/control')

    def test_missing(self):
        check_generated_file('debian/control')

    def test_do_not_edit(self):
        self.build_tree_contents([('debian/', ), ('debian/control', """\
# DO NOT EDIT
# This file was generated by blah

Source: blah
Testsuite: autopkgtest

""")])
        self.assertRaises(
            GeneratedFile, check_generated_file, 'debian/control')

    def test_do_not_edit_after_header(self):
        # check_generated_file() only checks the first 20 lines.
        self.build_tree_contents([
            ('debian/', ),
            ('debian/control', ('\n' * 50) + """\
# DO NOT EDIT
# This file was generated by blah

Source: blah
Testsuite: autopkgtest

""")])
        check_generated_file('debian/control')


class EditFormattedFileTests(TestCaseInTempDir):

    def test_unchanged(self):
        self.build_tree_contents([('a', 'some content\n')])
        self.assertFalse(edit_formatted_file(
            'a', 'some content\n', 'some content reformatted\n',
            'some content\n'))
        self.assertFalse(edit_formatted_file(
            'a', 'some content\n', 'some content\n',
            'some content\n'))
        self.assertFalse(edit_formatted_file(
            'a', 'some content\n', 'some content reformatted\n',
            'some content reformatted\n'))

    def test_changed(self):
        self.build_tree_contents([('a', 'some content\n')])
        self.assertTrue(edit_formatted_file(
            'a', 'some content\n', 'some content\n',
            'new content\n'))
        self.assertFileEqual('new content\n', 'a')

    def test_unformattable(self):
        self.assertRaises(
            FormattingUnpreservable, edit_formatted_file,
            'a', 'some content\n', 'reformatted content\n',
            'new content\n')
