X-Git-Url: https://scm.cri.ensmp.fr/git/linpy.git/blobdiff_plain/960f0c252361dfd696359f803aae40a9b13b14a6..7b93cea1daf2889e9ee10ca9c22a1b5124404937:/pypol/tests/test_linexprs.py diff --git a/pypol/tests/test_linexprs.py b/pypol/tests/test_linexprs.py deleted file mode 100644 index 0fca90e..0000000 --- a/pypol/tests/test_linexprs.py +++ /dev/null @@ -1,324 +0,0 @@ -# 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 . - -import functools -import unittest - -from fractions import Fraction - -from ..linexprs import * -from .libhelper import requires_sympy - - -class TestExpression(unittest.TestCase): - - def setUp(self): - self.x = Symbol('x') - self.y = Symbol('y') - self.z = Symbol('z') - 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(self): - self.assertIsInstance(Expression(coefficients={self.x: 1}), Symbol) - self.assertIsInstance(Expression(constant=self.pi), Rational) - self.assertNotIsInstance(self.x + self.pi, Symbol) - self.assertNotIsInstance(self.x + self.pi, Rational) - xx = Expression({self.x: 2}) - self.assertNotIsInstance(xx, Symbol) - with self.assertRaises(TypeError): - Expression('x + y', 2) - with self.assertRaises(TypeError): - Expression({0: 2}) - with self.assertRaises(TypeError): - Expression({'x': '2'}) - self.assertEqual(Expression(constant=1), Expression(constant=self.one)) - self.assertEqual(Expression(constant='1'), Expression(constant=self.one)) - with self.assertRaises(ValueError): - Expression(constant='a') - - def test_coefficient(self): - self.assertEqual(self.expr.coefficient(self.x), 1) - self.assertEqual(self.expr.coefficient(self.y), -2) - self.assertEqual(self.expr.coefficient(self.z), 0) - with self.assertRaises(TypeError): - self.expr.coefficients('x') - 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[self.x], 1) - self.assertEqual(self.expr[self.y], -2) - self.assertEqual(self.expr[self.z], 0) - with self.assertRaises(TypeError): - self.assertEqual(self.expr['x'], 1) - with self.assertRaises(TypeError): - self.expr[0] - with self.assertRaises(TypeError): - self.expr[self.expr] - - def test_coefficients(self): - self.assertListEqual(list(self.expr.coefficients()), [(self.x, 1), (self.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_symbols(self): - self.assertTupleEqual(self.x.symbols, (self.x,)) - self.assertTupleEqual(self.pi.symbols, ()) - self.assertTupleEqual(self.expr.symbols, (self.x, self.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_isconstant(self): - self.assertFalse(self.x.isconstant()) - self.assertTrue(self.pi.isconstant()) - self.assertFalse(self.expr.isconstant()) - - def test_issymbol(self): - self.assertTrue(self.x.issymbol()) - self.assertFalse(self.pi.issymbol()) - self.assertFalse(self.expr.issymbol()) - - def test_values(self): - self.assertListEqual(list(self.expr.values()), [1, -2, 3]) - - 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) - with self.assertRaises(TypeError): - self.x * self.x - - def test_truediv(self): - with self.assertRaises(ZeroDivisionError): - self.expr / 0 - self.assertEqual(self.expr / 2, self.x / 2 - self.y + Fraction(3, 2)) - with self.assertRaises(TypeError): - self.x / self.x - - def test_eq(self): - self.assertEqual(self.expr, self.expr) - self.assertNotEqual(self.x, self.y) - self.assertEqual(self.zero, 0) - - def test_scaleint(self): - self.assertEqual((self.x + self.y/2 + self.z/3).scaleint(), - 6*self.x + 3*self.y + 2*self.z) - - def test_subs(self): - self.assertEqual(self.x.subs(self.x, 3), 3) - self.assertEqual(self.x.subs(self.x, self.x), self.x) - self.assertEqual(self.x.subs(self.x, self.y), self.y) - self.assertEqual(self.x.subs(self.x, self.x + self.y), self.x + self.y) - self.assertEqual(self.x.subs(self.y, 3), self.x) - self.assertEqual(self.pi.subs(self.x, 3), self.pi) - self.assertEqual(self.expr.subs(self.x, -3), -2 * self.y) - self.assertEqual(self.expr.subs([(self.x, self.y), (self.y, self.x)]), 3 - self.x) - self.assertEqual(self.expr.subs({self.x: self.z, self.y: self.z}), 3 - self.z) - self.assertEqual(self.expr.subs({self.x: self.z, self.y: self.z}), 3 - self.z) - with self.assertRaises(TypeError): - self.x.subs('x', 3) - with self.assertRaises(TypeError): - self.expr.subs([('x', self.z), ('y', self.z)]) - with self.assertRaises(TypeError): - self.expr.subs({'x': self.z, 'y': self.z}) - with self.assertRaises(TypeError): - self.expr.subs(self.x, 'x') - - 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_repr(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') - - @requires_sympy - def test_fromsympy(self): - import sympy - 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): - import sympy - 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 TestSymbol(unittest.TestCase): - - def setUp(self): - self.x = Symbol('x') - self.y = Symbol('y') - - def test_new(self): - self.assertEqual(Symbol(' x '), self.x) - with self.assertRaises(TypeError): - Symbol(self.x) - with self.assertRaises(TypeError): - Symbol(1) - - def test_name(self): - self.assertEqual(self.x.name, 'x') - - def test_issymbol(self): - self.assertTrue(self.x.issymbol()) - - def test_fromstring(self): - self.assertEqual(Symbol.fromstring('x'), self.x) - with self.assertRaises(SyntaxError): - Symbol.fromstring('1') - - def test_repr(self): - self.assertEqual(str(self.x), 'x') - - @requires_sympy - def test_fromsympy(self): - import sympy - 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 TestDummy(unittest.TestCase): - - def setUp(self): - self.x = Dummy('x') - - def test_new(self): - self.assertEqual(self.x.name, 'x') - self.assertTrue(Dummy().name.startswith('Dummy')) - - def test_eq(self): - self.assertEqual(self.x, self.x) - self.assertNotEqual(self.x, Symbol('x')) - self.assertNotEqual(Symbol('x'), self.x) - self.assertNotEqual(self.x, Dummy('x')) - self.assertNotEqual(Dummy(), Dummy()) - - def test_repr(self): - self.assertEqual(repr(self.x), '_x') - dummy1 = Dummy() - dummy2 = Dummy() - self.assertTrue(repr(dummy1).startswith('_Dummy_')) - self.assertNotEqual(repr(dummy1), repr(dummy2)) - - -class TestSymbols(unittest.TestCase): - - def setUp(self): - self.x = Symbol('x') - self.y = Symbol('y') - - def test(self): - self.assertTupleEqual(symbols('x y'), (self.x, self.y)) - self.assertTupleEqual(symbols('x,y'), (self.x, self.y)) - self.assertTupleEqual(symbols(['x', 'y']), (self.x, self.y)) - with self.assertRaises(TypeError): - symbols(1) - with self.assertRaises(TypeError): - symbols(['a', 1]) - - -class TestRational(unittest.TestCase): - - def setUp(self): - self.zero = Rational(0) - self.one = Rational(1) - self.pi = Rational(22, 7) - - def test_new(self): - self.assertEqual(Rational(), self.zero) - self.assertEqual(Rational(1), self.one) - self.assertEqual(Rational(self.pi), self.pi) - self.assertEqual(Rational('22/7'), self.pi) - - def test_hash(self): - self.assertEqual(hash(self.one), hash(1)) - self.assertEqual(hash(self.pi), hash(Fraction(22, 7))) - - def test_isconstant(self): - self.assertTrue(self.zero.isconstant()) - - def test_bool(self): - self.assertFalse(self.zero) - self.assertTrue(self.pi) - - def test_repr(self): - self.assertEqual(repr(self.zero), '0') - self.assertEqual(repr(self.one), '1') - self.assertEqual(repr(self.pi), '22/7') - - @requires_sympy - def test_fromsympy(self): - import sympy - self.assertEqual(Rational.fromsympy(sympy.Rational(22, 7)), self.pi) - with self.assertRaises(TypeError): - Rational.fromsympy(sympy.Symbol('x'))