Use AbstractTransactionalSpringContextTests to rollback NUnit test case automatically-优快云博客

本文介绍了一个关于Spring.NET框架中重复加载上下文的问题及其解决方案。问题出现在使用多个继承自AbstractTransactionalSpringContextTests的测试类时，第二个测试类会抛出异常。通过将上下文缓存改为静态变量并在基类中实现缓存逻辑，成功避免了重复加载问题。

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I have two test cases: UserTest and CustomerTest, both of them extend the AbstractTransactionalSpringContextTests, they are using the same config file, so I wrote a BaseSpringTest class:

public class BaseSpringTest : AbstractTransactionalDbProviderSpringContextTests 
    {
        static protected string ctxName = "application_context.xml";
        static protected string[] configlocation = new string[] { "assembly://test/test.config/" + ctxName}; 
 
        protected override string[] ConfigLocations
        {
            get
            {
                return configlocation;
            }
        }        
    }
public class UserTest : BaseSpringTest
    {
     //test case ...
    }
public class CustomerTest : BaseSpringTest
    {
     //test case ...
    } 
 
  

When I run the tests, the first one runs ok, but the second one throws an exception:

Spring.Objects.Factory.ObjectCreationException : Error creating object with name 'xxxService' defined in 'assembly [Test, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null], resource [test.config.Service.xml]' : Initialization of object failed : Duplicate type name within an assembly.

----> System.ArgumentException : Duplicate type name within an assembly.

I traced into AbstractSpringContextTests class and found that it's using a hashtable to cache the loaded context, but the hashtable isn't a static field:

private IDictionary contextKeyToContextMap = new Hashtable();

So the problem is it load the context and put to the hashtable, but the hashtable is only available in the same class, when the nunit run the second test, the hashtable is empty again, so it try to load the context again, then the exception occurs.
So I think just change the hashtable to static is ok. but since spring.net is still in 1.1 RC1, we have to use another way temporarily.

What I'm doing now is cached the context again in the baseSpringTest class:

public class BaseSpringTest : AbstractTransactionalDbProviderSpringContextTests 
{
    static protected string ctxName = "application_context.xml";
    static protected string[] configlocation = new string[] { "assembly://Test.Service/Test.config/" + ctxName};
    static protected IConfigurableApplicationContext cachedApplicationContext = null; 
    
    protected override string[] ConfigLocations
    {
        get{ return configlocation; }
    } 
    
    [SetUp]
    public new void SetUp()
    {
        if (cachedApplicationContext == null)
        {
            XmlConfigurator.Configure();
            base.SetUp();
            cachedApplicationContext = applicationContext;
        } 
        
        applicationContext = cachedApplicationContext; 
    
                
       //you have to call the following, else the transaction won't rollback.
        EndTransaction();
        InjectDependencies();
        try
        {
            OnSetUp();
        }
        catch (Exception ex)
        {
            logger.Error("Setup error", ex);
            throw;
        }
    }
}