﻿#region License

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

#endregion

using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Gremlin.Net.Process.Traversal;

namespace Gremlin.Net.UnitTest.Process.Traversal
{
    public class TestTraversalStrategy : ITraversalStrategy
    {
        private readonly IAsyncEnumerable<Traverser> _traversers;

        public TestTraversalStrategy(IEnumerable<Traverser> traversersToAddOnApplication)
        {
            _traversers = TestTraversal.ToAsyncEnumerable(traversersToAddOnApplication);
        }

        public void Apply<TStart, TEnd>(ITraversal<TStart, TEnd> traversal)
        {
            traversal.Traversers = _traversers;
        }

        public Task ApplyAsync<TStart, TEnd>(ITraversal<TStart, TEnd> traversal, CancellationToken cancellationToken)
        {
            traversal.Traversers = _traversers;
            return Task.CompletedTask;
        }
    }
}