Support for dummy symbols

[linpy.git] / pypol / tests / test_linexprs.py

diff --git a/pypol/tests/test_linexprs.py b/pypol/tests/test_linexprs.py
index 8dfd13e..508c57b 100644 (file)
--- a/pypol/tests/test_linexprs.py
+++ b/pypol/tests/test_linexprs.py
@@ -20,9 +20,9 @@ class TestExpression(unittest.TestCase):
 
     def test_new(self):
         self.assertIsInstance(self.x, Symbol)
-        self.assertIsInstance(self.pi, Constant)
+        self.assertIsInstance(self.pi, Rational)
         self.assertNotIsInstance(self.x + self.pi, Symbol)
-        self.assertNotIsInstance(self.x + self.pi, Constant)
+        self.assertNotIsInstance(self.x + self.pi, Rational)
         xx = Expression({self.x: 2})
         self.assertNotIsInstance(xx, Symbol)
         with self.assertRaises(TypeError):
@@ -231,18 +231,35 @@ class TestSymbol(unittest.TestCase):
         self.assertListEqual(list(symbols(['x', 'y'])), [self.x, self.y])
 
 
-class TestConstant(unittest.TestCase):
+class TestDummy(unittest.TestCase):
 
     def setUp(self):
-        self.zero = Constant(0)
-        self.one = Constant(1)
-        self.pi = Constant(Fraction(22, 7))
+        self.x = Dummy('x')
 
     def test_new(self):
-        self.assertEqual(Constant(), self.zero)
-        self.assertEqual(Constant(1), self.one)
-        self.assertEqual(Constant(self.pi), self.pi)
-        self.assertEqual(Constant('22/7'), self.pi)
+        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())
+
+
+class TestRational(unittest.TestCase):
+
+    def setUp(self):
+        self.zero = Rational(0)
+        self.one = Rational(1)
+        self.pi = Rational(Fraction(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_isconstant(self):
         self.assertTrue(self.zero.isconstant())
@@ -252,11 +269,11 @@ class TestConstant(unittest.TestCase):
         self.assertTrue(self.pi)
 
     def test_fromstring(self):
-        self.assertEqual(Constant.fromstring('22/7'), self.pi)
+        self.assertEqual(Rational.fromstring('22/7'), self.pi)
         with self.assertRaises(ValueError):
-            Constant.fromstring('a')
+            Rational.fromstring('a')
         with self.assertRaises(TypeError):
-            Constant.fromstring(1)
+            Rational.fromstring(1)
 
     def test_repr(self):
         self.assertEqual(repr(self.zero), '0')
@@ -266,6 +283,6 @@ class TestConstant(unittest.TestCase):
     @requires_sympy
     def test_fromsympy(self):
         import sympy
-        self.assertEqual(Constant.fromsympy(sympy.Rational(22, 7)), self.pi)
+        self.assertEqual(Rational.fromsympy(sympy.Rational(22, 7)), self.pi)
         with self.assertRaises(TypeError):
-            Constant.fromsympy(sympy.Symbol('x'))
+            Rational.fromsympy(sympy.Symbol('x'))