// Copyright 2015 The Bazel 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.
package com.google.devtools.build.lib.actions.util;

import com.google.devtools.build.lib.actions.cache.ActionCache;
import com.google.devtools.build.lib.actions.cache.Protos.ActionCacheStatistics;
import com.google.devtools.build.lib.actions.cache.Protos.ActionCacheStatistics.MissReason;
import java.io.PrintStream;
import java.util.function.Predicate;

/**
 * Utilities for tests that use the action cache.
 */
public class ActionCacheTestHelper {
  private ActionCacheTestHelper() {}

  /** A cache which does not remember anything. Causes perpetual rebuilds! */
  public static final ActionCache AMNESIAC_CACHE =
      new ActionCache() {
        @Override
        public void put(String fingerprint, Entry entry) {}

        @Override
        public Entry get(String fingerprint) {
          return null;
        }

        @Override
        public void remove(String key) {}

        @Override
        public void removeIf(Predicate<Entry> predicate) {}

        @Override
        public long save() {
          return -1;
        }

        @Override
        public void clear() {}

        @Override
        public void dump(PrintStream out) {}

        @Override
        public void accountHit() {}

        @Override
        public void accountMiss(MissReason reason) {}

        @Override
        public void mergeIntoActionCacheStatistics(ActionCacheStatistics.Builder builder) {}

        @Override
        public void resetStatistics() {}
      };
}