How To Read UnitTest Project's App.Config From Test With HostType(“Moles”)

Question

I have the folowing tests:

[TestClass]
public class GeneralTest
{
    [TestMethod]
    public void VerifyAppDomainHasConfigurationSettings()
    {
        string value = ConfigurationManager.AppSettings["TestValue"];
        Assert.IsFalse(String.IsNullOrEmpty(value), "No App.Config found.");
    }

    [TestMethod]
    [HostType("Moles")]
    public void VerifyAppDomainHasConfigurationSettingsMoles()
    {
        string value = ConfigurationManager.AppSettings["TestValue"];
        Assert.IsFalse(String.IsNullOrEmpty(value), "No App.Config found.");
    }
}

The only difference between them is [HostType("Moles")]. But the first passes and the second fails. How can I read App.config from the second test?

Or may be I can add some another config file in other place?

Answer 1

See http://social.msdn.microsoft.com/Forums/en/pex/thread/9b4b9ec5-582c-41e8-8b9c-1bb9457ba3f6

In the mean time, as a work around, you could try adding the configuration settings to Microsoft.Moles.VsHost.x86.exe.config

Answer 2

Assuming you are trying to access values in appSettings, how about just adding the configuration at the beginning of your test. Something like:

ConfigurationManager.AppSettings["Key"] = "Value";

Then when your test tries to read the AppSettings "Key", "Value" will be returned.

Answer 3

You just add your "App.Config" file to the unit test project . It will read automatically.

Answer 4

    [ClassInitialize]
    public static void MyClassInitialize(TestContext testContext)
    {
        System.Configuration.Moles.MConfigurationManager.GetSectionString =
            (string configurationName) =>
                {
                    ExeConfigurationFileMap fileMap = new ExeConfigurationFileMap();
                    Assembly assembly = Assembly.GetExecutingAssembly();
                    fileMap.ExeConfigFilename = assembly.Location + ".config";
                    Configuration config = ConfigurationManager.OpenMappedExeConfiguration(fileMap, ConfigurationUserLevel.None);
                    object section = config.GetSection(configurationName);
                    if (section is DefaultSection)
                    {
                        ConfigurationSection configurationSection = (ConfigurationSection) section;
                        Type sectionType = Type.GetType(configurationSection.SectionInformation.Type);
                        if (sectionType != null)
                        {
                            IConfigurationSectionHandler sectionHandler =
                                (IConfigurationSectionHandler)AppDomain.CurrentDomain.CreateInstanceAndUnwrap(sectionType.Assembly.FullName, sectionType.FullName);
                            section = 
                                sectionHandler.Create(
                                    configurationSection.SectionInformation.GetParentSection(), 
                                    null,
                                    XElement.Parse(configurationSection.SectionInformation.GetRawXml()).ToXmlNode());
                        }
                    }

                    return section;
                };
    }

Answer 5

I ran across this issue at work and didn't like any of these answers. I also have the problem that the configuration file is being read in a static constructor which means I can't Mole ConfigurationManager before the static constructor is executed.

I tried this on my home computer and found that the configuration file was being read correctly. It turns out I was using Pex 0.94.51006.1 at home. This is slightly older than the current one. I was able to find a download for the older academic version: http://research.microsoft.com/en-us/downloads/d2279651-851f-4d7a-bf05-16fd7eb26559/default.aspx

I installed this on my work computer and everything is working perfectly. At this point, I'm downgrading to the older version until a newer working version is released.

Answer 6

This is what I am using to get the correct AppConfig and ConnectionString sections:

var config = System.Configuration.ConfigurationManager.OpenExeConfiguration(Reflection.Assembly.GetExecutingAssembly().Location);

typeof(Configuration.ConfigurationElementCollection).GetField("bReadOnly", Reflection.BindingFlags.Instance | Reflection.BindingFlags.NonPublic).SetValue(System.Configuration.ConfigurationManager.ConnectionStrings, false);
foreach (Configuration.ConnectionStringSettings conn in config.ConnectionStrings.ConnectionStrings)
    System.Configuration.ConfigurationManager.ConnectionStrings.Add(conn);

foreach (Configuration.KeyValueConfigurationElement conf in config.AppSettings.Settings)
    System.Configuration.ConfigurationManager.AppSettings(conf.Key) = conf.Value;

Saw the ConnectionString part here