# Copyright 2021 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
class RuleBase(object):
"""
A base class that represents a rule for validations.
Subclasses need to implement `validate`.
"""
def validate(self, assert_, target):
"""
Validates that `target` satisfies the rule.
Args:
assert_:
A function which takes a condition and a string error message.
target:
An object included in web_idl.Database.
"""
raise NotImplementedError()