# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:

# Copyright 2014-2015 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
#
# This file is part of qutebrowser.
#
# qutebrowser 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 3 of the License, or
# (at your option) any later version.
#
# qutebrowser 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 qutebrowser.  If not, see <http://www.gnu.org/licenses/>.

"""Tests for qutebrowser.utils.qtutils."""

import sys

import pytest

from qutebrowser import qutebrowser
from qutebrowser.utils import qtutils


class TestCheckOverflow:

    """Test check_overflow.

    Class attributes:
        INT32_MIN: Minimum valid value for a signed int32.
        INT32_MAX: Maximum valid value for a signed int32.
        INT64_MIN: Minimum valid value for a signed int64.
        INT64_MAX: Maximum valid value for a signed int64.
        GOOD_VALUES: A dict of types mapped to a list of good values.
        BAD_VALUES: A dict of types mapped to a list of bad values.
    """

    INT32_MIN = -(2 ** 31)
    INT32_MAX = 2 ** 31 - 1
    INT64_MIN = -(2 ** 63)
    INT64_MAX = 2 ** 63 - 1

    GOOD_VALUES = {
        'int': [-1, 0, 1, 23.42, INT32_MIN, INT32_MAX],
        'int64': [-1, 0, 1, 23.42, INT64_MIN, INT64_MAX],
    }

    BAD_VALUES = {
        'int': [(INT32_MIN - 1, INT32_MIN),
                (INT32_MAX + 1, INT32_MAX),
                (float(INT32_MAX + 1), INT32_MAX)],
        'int64': [(INT64_MIN - 1, INT64_MIN),
                  (INT64_MAX + 1, INT64_MAX),
                  (float(INT64_MAX + 1), INT64_MAX)],
    }

    @pytest.mark.parametrize('ctype, val', [(ctype, val) for ctype, vals in
                                            GOOD_VALUES.items() for val in
                                            vals])
    def test_good_values(self, ctype, val):
        """Test values which are inside bounds."""
        qtutils.check_overflow(val, ctype)

    @pytest.mark.parametrize('ctype, val',
                             [(ctype, val) for ctype, vals in
                              BAD_VALUES.items() for (val, _) in vals])
    def test_bad_values_fatal(self, ctype, val):
        """Test values which are outside bounds with fatal=True."""
        with pytest.raises(OverflowError):
            qtutils.check_overflow(val, ctype)

    @pytest.mark.parametrize('ctype, val, repl',
                             [(ctype, val, repl) for ctype, vals in
                              BAD_VALUES.items() for (val, repl) in vals])
    def test_bad_values_nonfatal(self, ctype, val, repl):
        """Test values which are outside bounds with fatal=False."""
        newval = qtutils.check_overflow(val, ctype, fatal=False)
        assert newval == repl


class TestGetQtArgs:

    """Tests for get_args."""

    @pytest.fixture
    def parser(self, mocker):
        """Fixture to provide an argparser.

        Monkey-patches .exit() of the argparser so it doesn't exit on errors.
        """
        parser = qutebrowser.get_argparser()
        mocker.patch.object(parser, 'exit', side_effect=Exception)
        return parser

    def test_no_qt_args(self, parser):
        """Test commandline with no Qt arguments given."""
        args = parser.parse_args(['--debug'])
        assert qtutils.get_args(args) == [sys.argv[0]]

    def test_qt_flag(self, parser):
        """Test commandline with a Qt flag."""
        args = parser.parse_args(['--debug', '--qt-reverse', '--nocolor'])
        assert qtutils.get_args(args) == [sys.argv[0], '-reverse']

    def test_qt_arg(self, parser):
        """Test commandline with a Qt argument."""
        args = parser.parse_args(['--qt-stylesheet', 'foobar'])
        assert qtutils.get_args(args) == [sys.argv[0], '-stylesheet', 'foobar']

    def test_qt_both(self, parser):
        """Test commandline with a Qt argument and flag."""
        args = parser.parse_args(['--qt-stylesheet', 'foobar', '--qt-reverse'])
        qt_args = qtutils.get_args(args)
        assert qt_args[0] == sys.argv[0]
        assert '-reverse' in qt_args
        assert '-stylesheet' in qt_args
        assert 'foobar' in qt_args