-# Copyright 2014 MINES ParisTech
-#
-# This file is part of Linpy.
-#
-# Linpy 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.
-#
-# Linpy 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 Linpy. If not, see <http://www.gnu.org/licenses/>.
-
-import functools
-import unittest
-
-from ..linexprs import symbols
-from ..polyhedra import *
-from .libhelper import requires_sympy
-
-
-class TestPolyhedron(unittest.TestCase):
-
- def setUp(self):
- x, y = symbols('x y')
- self.square = Polyhedron(inequalities=[x, 1 - x, y, 1 - y])
-
- def test_symbols(self):
- self.assertTupleEqual(self.square.symbols, symbols('x y'))
-
- def test_dimension(self):
- self.assertEqual(self.square.dimension, 2)
-
- def test_str(self):
- self.assertEqual(str(self.square),
- 'And(Ge(x, 0), Ge(-x + 1, 0), Ge(y, 0), Ge(-y + 1, 0))')
-
- def test_repr(self):
- self.assertEqual(repr(self.square),
- "And(Ge(x, 0), Ge(-x + 1, 0), Ge(y, 0), Ge(-y + 1, 0))")
-
- def test_fromstring(self):
- self.assertEqual(Polyhedron.fromstring('{x >= 0, -x + 1 >= 0, '
- 'y >= 0, -y + 1 >= 0}'), self.square)
-
- def test_isempty(self):
- self.assertFalse(self.square.isempty())
-
- def test_isuniverse(self):
- self.assertFalse(self.square.isuniverse())
-
- @requires_sympy
- def test_fromsympy(self):
- import sympy
- sp_x, sp_y = sympy.symbols('x y')
- self.assertEqual(Polyhedron.fromsympy((sp_x >= 0) & (sp_x <= 1) &
- (sp_y >= 0) & (sp_y <= 1)), self.square)
-
- @requires_sympy
- def test_tosympy(self):
- import sympy
- sp_x, sp_y = sympy.symbols('x y')
- self.assertEqual(self.square.tosympy(),
- sympy.And(-sp_x + 1 >= 0, -sp_y + 1 >= 0, sp_x >= 0, sp_y >= 0))
-
-
-class TestEmpty:
-
- def test_repr(self):
- self.assertEqual(repr(Empty), 'Empty')
-
- def test_isempty(self):
- self.assertTrue(Empty.isempty())
-
- def test_isuniverse(self):
- self.assertFalse(Empty.isuniverse())
-
-
-class TestUniverse:
-
- def test_repr(self):
- self.assertEqual(repr(Universe), 'Universe')
-
- def test_isempty(self):
- self.assertTrue(Universe.isempty())
-
- def test_isuniverse(self):
- self.assertTrue(Universe.isuniverse())