src/log4net.Tests/Util/PatternStringTest.cs

/*
 *
 * 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.
 *
*/

using System;
using log4net.Util;
using NUnit.Framework;
using System.IO;
using System.Reflection;
using System.Configuration;

namespace log4net.Tests.Util
{
    [TestFixture]
    public class PatternStringTest : MarshalByRefObject
    {
        [Test]
        public void TestEnvironmentFolderPathPatternConverter()
        {
            string[] specialFolderNames = Enum.GetNames(typeof(Environment.SpecialFolder));

            foreach (string specialFolderName in specialFolderNames)
            {
                string pattern = "%envFolderPath{" + specialFolderName + "}";

                PatternString patternString = new PatternString(pattern);

                string evaluatedPattern = patternString.Format();

                Environment.SpecialFolder specialFolder = 
                    (Environment.SpecialFolder)Enum.Parse(typeof(Environment.SpecialFolder), specialFolderName);

                Assert.AreEqual(Environment.GetFolderPath(specialFolder), evaluatedPattern);
            }
        }

        [Test]
        public void TestAppSettingPathConverter()
        {
            string configurationFileContent = @"
<configuration>
  <appSettings>
    <add key=""TestKey"" value = ""TestValue"" />
  </appSettings>
</configuration>
";
            string configurationFileName = null;
            AppDomain appDomain = null;
            try
            {
                configurationFileName = CreateTempConfigFile(configurationFileContent);
                appDomain = CreateConfiguredDomain("AppSettingsTestDomain", configurationFileName);

                PatternStringTest pst = (PatternStringTest)appDomain.CreateInstanceAndUnwrap(Assembly.GetExecutingAssembly().FullName, this.GetType().FullName);
                pst.TestAppSettingPathConverterInConfiguredDomain();
            }
            finally
            {
                if (appDomain != null) AppDomain.Unload(appDomain);
                if (configurationFileName != null) File.Delete(configurationFileName);
            }
        }

        public void TestAppSettingPathConverterInConfiguredDomain()
        {
            string pattern = "%appSetting{TestKey}";
            PatternString patternString = new PatternString(pattern);
            string evaluatedPattern = patternString.Format();
            string appSettingValue = ConfigurationManager.AppSettings["TestKey"];
            Assert.AreEqual("TestValue", appSettingValue, "Expected configuration file to contain a key TestKey with the value TestValue");
            Assert.AreEqual(appSettingValue, evaluatedPattern, "Evaluated pattern expected to be identical to appSetting value");

            string badPattern = "%appSetting{UnknownKey}";
            patternString = new PatternString(badPattern);
            evaluatedPattern = patternString.Format();
            Assert.AreEqual("(null)", evaluatedPattern, "Evaluated pattern expected to be \"(null)\" for non-existent appSettings key");
        }

        private static string CreateTempConfigFile(string configurationFileContent)
        {
            string fileName = Path.GetTempFileName();
            File.WriteAllText(fileName, configurationFileContent);
            return fileName;
        }

        private static AppDomain CreateConfiguredDomain(string domainName, string configurationFileName)
        {
            AppDomainSetup ads = new AppDomainSetup();
            ads.ApplicationBase = AppDomain.CurrentDomain.BaseDirectory;
            ads.ConfigurationFile = configurationFileName;
            AppDomain ad = AppDomain.CreateDomain(domainName, null, ads);
            return ad;
        }
    }
}