X-Git-Url: https://scm.cri.ensmp.fr/git/linpy.git/blobdiff_plain/960f0c252361dfd696359f803aae40a9b13b14a6..7b93cea1daf2889e9ee10ca9c22a1b5124404937:/linpy/tests/test_polyhedra.py

diff --git a/linpy/tests/test_polyhedra.py b/linpy/tests/test_polyhedra.py
new file mode 100644
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+++ b/linpy/tests/test_polyhedra.py
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+# 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())