X-Git-Url: https://scm.cri.ensmp.fr/git/linpy.git/blobdiff_plain/66e41ccd173874b3309e4c24be64c7b6b2ac6298..1d494bb187b70135df721c13306d7f26fdf33f50:/tests/test_linear.py diff --git a/tests/test_linear.py b/tests/test_linear.py deleted file mode 100644 index 6cd1ff4..0000000 --- a/tests/test_linear.py +++ /dev/null @@ -1,298 +0,0 @@ -import functools -import unittest - -from fractions import Fraction - -from pypol.linear import * - - -try: - import sympy - def _requires_sympy(func): - @functools.wraps(func) - def wrapper(self): - return func(self) - return wrapper -except ImportError: - def _requires_sympy(func): - @functools.wraps(func) - def wrapper(self): - raise unittest.SkipTest('SymPy is not available') - return wrapper - - -class TestExpression(unittest.TestCase): - - def setUp(self): - self.x = Expression({'x': 1}) - self.y = Expression({'y': 1}) - self.z = Expression({'z': 1}) - self.zero = Expression(constant=0) - self.one = Expression(constant=1) - self.pi = Expression(constant=Fraction(22, 7)) - self.expr = self.x - 2*self.y + 3 - - def test_new_subclass(self): - self.assertIsInstance(self.x, Symbol) - self.assertIsInstance(self.pi, Constant) - self.assertNotIsInstance(self.x + self.pi, Symbol) - self.assertNotIsInstance(self.x + self.pi, Constant) - xx = Expression({'x': 2}) - self.assertNotIsInstance(xx, Symbol) - - def test_new_types(self): - with self.assertRaises(TypeError): - Expression('x + y', 2) - self.assertEqual(Expression({'x': 2}), Expression({self.x: 2})) - with self.assertRaises(TypeError): - Expression({0: 2}) - with self.assertRaises(TypeError): - Expression({'x': '2'}) - self.assertEqual(Expression(constant=1), Expression(constant=self.one)) - with self.assertRaises(TypeError): - Expression(constant='1') - - def test_symbols(self): - self.assertCountEqual(self.x.symbols, ['x']) - self.assertCountEqual(self.pi.symbols, []) - self.assertCountEqual(self.expr.symbols, ['x', 'y']) - - def test_dimension(self): - self.assertEqual(self.x.dimension, 1) - self.assertEqual(self.pi.dimension, 0) - self.assertEqual(self.expr.dimension, 2) - - def test_coefficient(self): - self.assertEqual(self.expr.coefficient('x'), 1) - self.assertEqual(self.expr.coefficient('y'), -2) - self.assertEqual(self.expr.coefficient(self.y), -2) - self.assertEqual(self.expr.coefficient('z'), 0) - with self.assertRaises(TypeError): - self.expr.coefficient(0) - with self.assertRaises(TypeError): - self.expr.coefficient(self.expr) - - def test_getitem(self): - self.assertEqual(self.expr['x'], 1) - self.assertEqual(self.expr['y'], -2) - self.assertEqual(self.expr[self.y], -2) - self.assertEqual(self.expr['z'], 0) - with self.assertRaises(TypeError): - self.expr[0] - with self.assertRaises(TypeError): - self.expr[self.expr] - - def test_coefficients(self): - self.assertCountEqual(self.expr.coefficients(), [('x', 1), ('y', -2)]) - - def test_constant(self): - self.assertEqual(self.x.constant, 0) - self.assertEqual(self.pi.constant, Fraction(22, 7)) - self.assertEqual(self.expr.constant, 3) - - def test_isconstant(self): - self.assertFalse(self.x.isconstant()) - self.assertTrue(self.pi.isconstant()) - self.assertFalse(self.expr.isconstant()) - - def test_values(self): - self.assertCountEqual(self.expr.values(), [1, -2, 3]) - - def test_issymbol(self): - self.assertTrue(self.x.issymbol()) - self.assertFalse(self.pi.issymbol()) - self.assertFalse(self.expr.issymbol()) - - def test_bool(self): - self.assertTrue(self.x) - self.assertFalse(self.zero) - self.assertTrue(self.pi) - self.assertTrue(self.expr) - - def test_pos(self): - self.assertEqual(+self.expr, self.expr) - - def test_neg(self): - self.assertEqual(-self.expr, -self.x + 2*self.y - 3) - - def test_add(self): - self.assertEqual(self.x + Fraction(22, 7), self.x + self.pi) - self.assertEqual(Fraction(22, 7) + self.x, self.x + self.pi) - self.assertEqual(self.x + self.x, 2 * self.x) - self.assertEqual(self.expr + 2*self.y, self.x + 3) - - def test_sub(self): - self.assertEqual(self.x - self.x, 0) - self.assertEqual(self.expr - 3, self.x - 2*self.y) - self.assertEqual(0 - self.x, -self.x) - - def test_mul(self): - self.assertEqual(self.pi * 7, 22) - self.assertEqual(self.expr * 0, 0) - self.assertEqual(0 * self.expr, 0) - self.assertEqual(self.expr * 2, 2*self.x - 4*self.y + 6) - - def test_div(self): - with self.assertRaises(ZeroDivisionError): - self.expr / 0 - self.assertEqual(self.expr / 2, self.x / 2 - self.y + Fraction(3, 2)) - - def test_str(self): - self.assertEqual(str(Expression()), '0') - self.assertEqual(str(self.x), 'x') - self.assertEqual(str(-self.x), '-x') - self.assertEqual(str(self.pi), '22/7') - self.assertEqual(str(self.expr), 'x - 2*y + 3') - - def test_repr(self): - self.assertEqual(repr(self.x), "Symbol('x')") - self.assertEqual(repr(self.one), 'Constant(1)') - self.assertEqual(repr(self.pi), 'Constant(22, 7)') - self.assertEqual(repr(self.x + self.one), "Expression('x + 1')") - self.assertEqual(repr(self.expr), "Expression('x - 2*y + 3')") - - def test_fromstring(self): - self.assertEqual(Expression.fromstring('x'), self.x) - self.assertEqual(Expression.fromstring('-x'), -self.x) - self.assertEqual(Expression.fromstring('22/7'), self.pi) - self.assertEqual(Expression.fromstring('x - 2y + 3'), self.expr) - self.assertEqual(Expression.fromstring('x - (3-1)y + 3'), self.expr) - self.assertEqual(Expression.fromstring('x - 2*y + 3'), self.expr) - - def test_eq(self): - self.assertEqual(self.expr, self.expr) - self.assertNotEqual(self.x, self.y) - self.assertEqual(self.zero, 0) - - def test__toint(self): - self.assertEqual((self.x + self.y/2 + self.z/3)._toint(), - 6*self.x + 3*self.y + 2*self.z) - - @_requires_sympy - def test_fromsympy(self): - sp_x, sp_y = sympy.symbols('x y') - self.assertEqual(Expression.fromsympy(sp_x), self.x) - self.assertEqual(Expression.fromsympy(sympy.Rational(22, 7)), self.pi) - self.assertEqual(Expression.fromsympy(sp_x - 2*sp_y + 3), self.expr) - with self.assertRaises(ValueError): - Expression.fromsympy(sp_x*sp_y) - - @_requires_sympy - def test_tosympy(self): - sp_x, sp_y = sympy.symbols('x y') - self.assertEqual(self.x.tosympy(), sp_x) - self.assertEqual(self.pi.tosympy(), sympy.Rational(22, 7)) - self.assertEqual(self.expr.tosympy(), sp_x - 2*sp_y + 3) - - -class TestConstant(unittest.TestCase): - - def setUp(self): - self.zero = Constant(0) - self.one = Constant(1) - self.pi = Constant(Fraction(22, 7)) - - @_requires_sympy - def test_fromsympy(self): - self.assertEqual(Constant.fromsympy(sympy.Rational(22, 7)), self.pi) - with self.assertRaises(TypeError): - Constant.fromsympy(sympy.Symbol('x')) - - -class TestSymbol(unittest.TestCase): - - def setUp(self): - self.x = Symbol('x') - self.y = Symbol('y') - - def test_name(self): - self.assertEqual(self.x.name, 'x') - - def test_symbols(self): - self.assertListEqual(list(symbols('x y')), [self.x, self.y]) - self.assertListEqual(list(symbols('x,y')), [self.x, self.y]) - self.assertListEqual(list(symbols(['x', 'y'])), [self.x, self.y]) - - @_requires_sympy - def test_fromsympy(self): - sp_x = sympy.Symbol('x') - self.assertEqual(Symbol.fromsympy(sp_x), self.x) - with self.assertRaises(TypeError): - Symbol.fromsympy(sympy.Rational(22, 7)) - with self.assertRaises(TypeError): - Symbol.fromsympy(2 * sp_x) - with self.assertRaises(TypeError): - Symbol.fromsympy(sp_x*sp_x) - - -class TestOperators(unittest.TestCase): - - pass - - -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.assertCountEqual(self.square.symbols, ['x', 'y']) - - def test_dimension(self): - self.assertEqual(self.square.dimension, 2) - - def test_str(self): - self.assertEqual(str(self.square), - 'x >= 0, -x + 1 >= 0, y >= 0, -y + 1 >= 0') - - def test_repr(self): - self.assertEqual(repr(self.square), - "Polyhedron('x >= 0, -x + 1 >= 0, y >= 0, -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()) - - @unittest.expectedFailure - @_requires_sympy - def test_fromsympy(self): - 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): - 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())