TestEncodingExtensions.cs

using Lucene.Net.Attributes;
using Lucene.Net.Util;
using NUnit.Framework;
using System.Text;

#if !FEATURE_ENCODING_GETSTRING_READONLYSPAN
using System;
#endif

namespace Lucene.Net.Support.Text
{
    /*
     * 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.
     */

    [TestFixture]
    public class TestEncodingExtensions : LuceneTestCase
    {
        [Test, LuceneNetSpecific]
        public void TestWithDecoderExceptionFallback()
        {
            Encoding encoding = Encoding.UTF8;
            Encoding newEncoding = encoding.WithDecoderExceptionFallback();
            Assert.AreNotSame(encoding, newEncoding);
            Assert.AreEqual(DecoderFallback.ExceptionFallback, newEncoding.DecoderFallback);

            Assert.Throws<DecoderFallbackException>(() =>
            {
                _ = newEncoding.GetString(new byte[] { 0xF0 });
            });
        }

#if !FEATURE_ENCODING_GETSTRING_READONLYSPAN
        [Test, LuceneNetSpecific]
        public void TestGetString_ReadOnlySpan()
        {
            Encoding encoding = Encoding.UTF8;
            Span<byte> bytes = stackalloc byte[] { 0x40 };
            string s = encoding.GetString(bytes);
            Assert.AreEqual("@", s);
        }
#endif
    }
}