def test_add_expression_variable(self):
a = Expression(Variable('o', 10), 20, 2)
v = Variable('v', 20)
# should work just like add_variable
a.add_expression(v, 2)
self.assertEqual(len(a.terms), 2)
self.assertEqual(a.terms.get(v), 2)
def test_add_expression_variable(self):
a = Expression(Variable('o', 10), 20, 2)
v = Variable('v', 20)
# should work just like add_variable
a.add_expression(v, 2)
self.assertEqual(len(a.terms), 2)
self.assertEqual(a.terms.get(v), 2)
def test_add_expression(self):
va = Variable('a', 10)
vb = Variable('b', 20)
vc = Variable('c', 5)
a = Expression(va, 20, 2)
# different variable and implicit coefficient of 1, should make new term
a.add_expression(Expression(vb, 10, 5))
self.assertEqual(len(a.terms), 2)
self.assertEqual(a.constant, 7)
self.assertEqual(a.terms.get(vb), 10)
# same variable, should reuse existing term
a.add_expression(Expression(vb, 2, 5))
self.assertEqual(len(a.terms), 2)
self.assertEqual(a.constant, 12)
self.assertEqual(a.terms.get(vb), 12)
# another variable and a coefficient,
# should multiply the constant and all terms in the new expression
a.add_expression(Expression(vc, 1, 2), 2)
self.assertEqual(len(a.terms), 3)
self.assertEqual(a.constant, 16)
self.assertEqual(a.terms.get(vc), 2)
def test_add_expression(self):
va = Variable('a', 10)
vb = Variable('b', 20)
vc = Variable('c', 5)
a = Expression(va, 20, 2)
# different variable and implicit coefficient of 1, should make new term
a.add_expression(Expression(vb, 10, 5))
self.assertEqual(len(a.terms), 2)
self.assertEqual(a.constant, 7)
self.assertEqual(a.terms.get(vb), 10)
# same variable, should reuse existing term
a.add_expression(Expression(vb, 2, 5))
self.assertEqual(len(a.terms), 2)
self.assertEqual(a.constant, 12)
self.assertEqual(a.terms.get(vb), 12)
# another variable and a coefficient,
# should multiply the constant and all terms in the new expression
a.add_expression(Expression(vc, 1, 2), 2)
self.assertEqual(len(a.terms), 3)
self.assertEqual(a.constant, 16)
self.assertEqual(a.terms.get(vc), 2)
def test_variable_expression(self):
"Variable expressions can be constructed"
x = Variable('x', 167)
y = Variable('y', 2)
cly = Expression(y)
cly.add_expression(x)
def test_variable_expression(self):
"Variable expressions can be constructed"
x = Variable('x', 167)
y = Variable('y', 2)
cly = Expression(y)
cly.add_expression(x)
