tests/enforcer_cached_test.cpp

/*
 * Copyright 2021 The casbin Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * This is a test file showcasing the workflow of casbin::CachedEnforcer
 */

#include <casbin/casbin.h>
#include <gtest/gtest.h>

#include "config_path.h"

namespace {

TEST(TestEnforcerCached, TestCache) {
    casbin::CachedEnforcer e(basic_model_path, basic_policy_path);
    ASSERT_EQ(e.Enforce({"alice", "data1", "read"}), true);
    ASSERT_EQ(e.Enforce({"alice", "data1", "write"}), false);
    ASSERT_EQ(e.Enforce({"alice", "data2", "read"}), false);
    ASSERT_EQ(e.Enforce({"alice", "data2", "write"}), false);

    // The cache is enabled, so even if we remove a policy rule, the decision
    // for ("alice", "data1", "read") will still be true, as it uses the cached result.
    e.RemovePolicy({"alice", "data1", "read"});
    ASSERT_EQ(e.Enforce({"alice", "data1", "read"}), true);
    ASSERT_EQ(e.Enforce({"alice", "data1", "write"}), false);
    ASSERT_EQ(e.Enforce({"alice", "data2", "read"}), false);
    ASSERT_EQ(e.Enforce({"alice", "data2", "write"}), false);

    // Now we invalidate the cache, then all first-coming Enforce() has to be evaluated in real-time.
    // The decision for ("alice", "data1", "read") will be false now.
    e.InvalidateCache();
    ASSERT_EQ(e.Enforce({"alice", "data1", "read"}), false);
    ASSERT_EQ(e.Enforce({"alice", "data1", "write"}), false);
    ASSERT_EQ(e.Enforce({"alice", "data2", "read"}), false);
    ASSERT_EQ(e.Enforce({"alice", "data2", "write"}), false);
}

} // namespace