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# Copyright 2023 DeepMind Technologies Limited
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
"""Unit tests for ddar.py."""
import unittest
from absl.testing import absltest
import ddar
import graph as gh
import problem as pr
class DDARTest(unittest.TestCase):
@classmethod
def setUpClass(cls):
super().setUpClass()
cls.defs = pr.Definition.from_txt_file('defs.txt', to_dict=True)
cls.rules = pr.Theorem.from_txt_file('rules.txt', to_dict=True)
def test_orthocenter_should_fail(self):
txt = 'a b c = triangle a b c; d = on_tline d b a c, on_tline d c a b ? perp a d b c' # pylint: disable=line-too-long
p = pr.Problem.from_txt(txt)
g, _ = gh.Graph.build_problem(p, DDARTest.defs)
ddar.solve(g, DDARTest.rules, p, max_level=1000)
goal_args = g.names2nodes(p.goal.args)
self.assertFalse(g.check(p.goal.name, goal_args))
def test_orthocenter_aux_should_succeed(self):
txt = 'a b c = triangle a b c; d = on_tline d b a c, on_tline d c a b; e = on_line e a c, on_line e b d ? perp a d b c' # pylint: disable=line-too-long
p = pr.Problem.from_txt(txt)
g, _ = gh.Graph.build_problem(p, DDARTest.defs)
ddar.solve(g, DDARTest.rules, p, max_level=1000)
goal_args = g.names2nodes(p.goal.args)
self.assertTrue(g.check(p.goal.name, goal_args))
def test_incenter_excenter_should_succeed(self):
# Note that this same problem should fail in dd_test.py
p = pr.Problem.from_txt(
'a b c = triangle a b c; d = incenter d a b c; e = excenter e a b c ?'
' perp d c c e'
) # pylint: disable=line-too-long
g, _ = gh.Graph.build_problem(p, DDARTest.defs)
ddar.solve(g, DDARTest.rules, p, max_level=1000)
goal_args = g.names2nodes(p.goal.args)
self.assertTrue(g.check(p.goal.name, goal_args))
if __name__ == '__main__':
absltest.main()
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