# This file is part of TRS (http://math.kompiler.org)
#
# TRS is free software: you can redistribute it and/or modify it under the
# terms of the GNU Affero General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# TRS 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 Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License
# along with TRS.  If not, see <http://www.gnu.org/licenses/>.
import unittest

from src.parser import Parser
from src.node import ExpressionLeaf as L
from tests.parser import run_expressions, apply_expressions


class TestB1Ch08(unittest.TestCase):

    def test_diagnostic_test_parser(self):
        run_expressions(Parser, [
            ('6*5^2', L(6) * L(5) ** 2),
            ('-5*(-3)^2', -(L(5) * (-L(3)) ** 2)),
            ('7p-3p', L(7) * 'p' + -(L(3) * 'p')),
            ('-5a*-6', -(L(5) * 'a' * -L(6))),
            ('3a-8--5-2a', L(3) * 'a' + -L(8) + --(L(5)) + -(L(2) * 'a')),
            ])

    def test_diagnostic_test_application(self):
        apply_expressions(Parser, [
            ('7p+2p', 1, (L(7) + 2) * 'p'),
            ('7p-3p', 1, (L(7) + -L(3)) * 'p'),
            ])