src/Lucene.Net.TestFramework/Support/Configuration/ConfigurationExtensions.cs

using Microsoft.Extensions.Configuration;
using System;

namespace Lucene.Net.Configuration
{
    /*
     * 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.
     */

    internal static class ConfigurationExtensions
    {
        /// <summary>
        /// Reloads configuration in (rare) test scenarios that require it.
        /// </summary>
        /// <param name="configuration">The configuration.</param>
        // LUCENENET NOTE: Tests should be designed in such a way as to read settings from
        // mock or in-memory providers rather than setting them globally, which isn't compatible with
        // the testing paradigm. This is for internal testing of our reload implementation.
        internal static void Reload(this IConfiguration configuration)
        {
            if (configuration is IConfigurationRoot configurationRoot)
                configurationRoot.Reload();
            else
                throw new InvalidOperationException($"{nameof(configuration)} does not implement {nameof(IConfigurationRoot)}.");
        }
    }
}