def test_remove_edge(self):
rule = Rule(self.p, self.pattern, self.rhs,
self.p_lhs, self.p_rhs)
rule.remove_edge(1, 2)
assert_graph_eq(rule.lhs, self.pattern)
assert(('d', 'a') in rule.p.edges())
assert(('s', 'x') in rule.rhs.edges())
return
def test_remove_non_existing_edge(self):
rule = Rule(self.p, self.pattern, self.rhs,
self.p_lhs, self.p_rhs)
rule.remove_edge(3, 2)
return
