using Lucene.Net.Util;
using System;

namespace Lucene.Net.Search.Grouping
{
    /*
     * 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.
     */

    /// <summary>
    /// Base class for grouping related tests.
    /// </summary>
    // TODO (MvG) : The grouping tests contain a lot of code duplication. Try to move the common code to this class..
    public abstract class AbstractGroupingTestCase : LuceneTestCase
    {
        protected string GenerateRandomNonEmptyString()
        {
            string randomValue;
            do
            {
                // B/c of DV based impl we can't see the difference between an empty string and a null value.
                // For that reason we don't generate empty string
                // groups.
                randomValue = TestUtil.RandomRealisticUnicodeString(Random);
                //randomValue = TestUtil.randomSimpleString(Random);
            } while ("".Equals(randomValue, StringComparison.Ordinal));
            return randomValue;
        }
    }
}
