def test_standardize_apart(self):
var1, var2 = tree.Var(1), tree.Var(2)
tr1 = tree.T('ListLink', var1, var2)
tr2 = tree.standardize_apart(tr1)
print tr1
print tr2
self.assertNotEquals(tree.unify(tr1, tr2, {}), None)
var1_new, var2_new = tr2.args
self.assertNotEquals(var1_new, var2_new)
assert var1_new not in [var1, var2]
assert var2_new not in [var1, var2]
def test_apply_rule(self):
atoms = [self.l1, self.l2]
# This is supposed to look up all Atoms of (exactly) type 'Link', and return their first outgoing atom
link_template = tree.T('Link', 1, 2)
first = tree.Var(1)
result_trees = tree.apply_rule(link_template, first, atoms)
result_correct = map(tree.tree_from_atom, [self.x1, self.l1])
self.assertEquals(result_trees, result_correct)
def test_is_variable(self):
var_tree = tree.Var(1)
self.assertEquals(var_tree.is_variable(), True)
node_tree = tree.T(self.x1)
self.assertEquals(node_tree.is_variable(), False)