src/Lucene.Net.Tests/Support/TestStringExtensions.cs

using NUnit.Framework;

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

    public class TestStringExtensions
    {
        [Test]
        public void TestTrimEnd()
        {
            // Zero length
            CollectionAssert.AreEqual(new string[0], new string[0].TrimEnd());
            CollectionAssert.AreEqual(new string[0], new string[] { "" }.TrimEnd());
            CollectionAssert.AreEqual(new string[0], new string[] { "", "" }.TrimEnd());

            CollectionAssert.AreEqual(new string[0], new string[] { "", "", null }.TrimEnd());
            CollectionAssert.AreEqual(new string[0], new string[] { null }.TrimEnd());
            CollectionAssert.AreEqual(new string[0], new string[] { null, null }.TrimEnd());

            // End trimming
            CollectionAssert.AreEqual(new string[] { "foo" }, new string[] { "foo", "" }.TrimEnd());
            CollectionAssert.AreEqual(new string[] { "foo" }, new string[] { "foo", "", "" }.TrimEnd());
            CollectionAssert.AreEqual(new string[] { "foo" }, new string[] { "foo", "", "", "" }.TrimEnd());

            CollectionAssert.AreEqual(new string[] { "foo", "bar" }, new string[] { "foo", "bar", "" }.TrimEnd());
            CollectionAssert.AreEqual(new string[] { "foo", "bar" }, new string[] { "foo", "bar", "", "" }.TrimEnd());
            CollectionAssert.AreEqual(new string[] { "foo", "bar" }, new string[] { "foo", "bar", "", "", "" }.TrimEnd());

            // End trimming without trimming beginning or middle entries
            CollectionAssert.AreEqual(new string[] { "", "foo" }, new string[] { "", "foo" }.TrimEnd());
            CollectionAssert.AreEqual(new string[] { "", "foo", "bar" }, new string[] { "", "foo", "bar" }.TrimEnd());
            CollectionAssert.AreEqual(new string[] { "foo", "", "bar" }, new string[] { "foo", "", "bar" }.TrimEnd());

            CollectionAssert.AreEqual(new string[] { "", "foo" }, new string[] { "", "foo", "" }.TrimEnd());
            CollectionAssert.AreEqual(new string[] { "", "foo", "bar" }, new string[] { "", "foo", "bar", "" }.TrimEnd());
            CollectionAssert.AreEqual(new string[] { "foo", "", "bar" }, new string[] { "foo", "", "bar", "" }.TrimEnd());

            CollectionAssert.AreEqual(new string[] { "", "foo" }, new string[] { "", "foo", "", "" }.TrimEnd());
            CollectionAssert.AreEqual(new string[] { "", "foo", "bar" }, new string[] { "", "foo", "bar", "", "" }.TrimEnd());
            CollectionAssert.AreEqual(new string[] { "foo", "", "bar" }, new string[] { "foo", "", "bar", "", "" }.TrimEnd());
        }
    }
}