def test_substituter_conditions(self):
x = Symbol("x")
y = Symbol("y")
and_x_x = And(x, x)
ftype = FunctionType(BOOL, [BOOL])
f = Symbol("f", ftype)
# 1. All arguments must be terms
args_good = {x: y}
args_bad = {x: f}
substitute(and_x_x, args_good)
with self.assertRaisesRegex(TypeError, " substitutions"):
substitute(and_x_x, args_bad)
# 2. All arguments belong to the manager of the substituter.
new_mgr = FormulaManager(get_env())
new_x = new_mgr.Symbol("x")
self.assertNotEqual(x, new_x)
args_1 = {x: new_x}
args_2 = {new_x: new_x}
with self.assertRaisesRegex(TypeError, "Formula Manager"):
substitute(and_x_x, args_1)
with self.assertRaisesRegex(TypeError, "Formula Manager."):
substitute(and_x_x, args_2)
with self.assertRaisesRegex(TypeError, "substitute()"):
substitute(f, {x: x})
def test_formula_in_formula_manager(self):
x = self.mgr.FreshSymbol()
and_x_x = self.mgr.And(x, x)
new_mgr = FormulaManager(get_env())
y = new_mgr.FreshSymbol()
and_y_y = new_mgr.And(y, y)
self.assertTrue(x in self.mgr)
self.assertFalse(y in self.mgr)
self.assertTrue(and_x_x in self.mgr)
self.assertFalse(and_y_y in self.mgr)