如何使用.Net数据服务和服务操作进行TDD ?

My current solution is to create a class that has my service/data business logic, test that with a local db (mdf) and then wrap that class with identical functions from the data service class.

我现在的解决方案是创建一个具有服务/数据业务逻辑的类，用本地db (mdf)测试，然后用数据服务类的相同函数包装这个类。

public class MyDataService : DataService<MyEntities>
{
    [WebGet]
    [SingleResult]
    public Team GetTeam(string name)
    {
        return _serviceBusinessLogic.GetTeam(name);
    }
}

//seam here to make this testable
public class ServiceBusinessLogic
{
    public Team GetTeam(string name)
    {
        return _dbContext.Teams.SingleOrDefault(p => p.Name == name);
    }
}

But since they are identical, there should be no need for the wrapper functions.

但是由于它们是相同的，因此不需要包装器函数。

I would like to test the data services directly, but there is no way for me to set the DataSource since CreateDataSource is protected.

我想直接测试数据服务，但是因为CreateDataSource受到保护，所以我无法设置数据源。

public class MyDataService : DataService<MyEntities>
{
    [WebGet]
    [SingleResult]
    public Team GetTeam(string name)
    {
        //problem is CurrentDataSource is not settable, so cant set it in test
        return CurrentDataSource.Teams.SingleOrDefault(p => p.Name == name);
    }
}

1 个解决方案

#1

You can write your class in such a way that allows you to inject your datasource, like so:

您可以以这样一种方式编写您的类，它允许您注入您的数据源，比如:

public class MyDataService : DataService<MyEntities>
{
    private MyEntities _dataSource;

    public MyDataService() : this(new MyEntities()){}

    public MyDataService(MyEntities dataSource)
    {
        _dataSource = dataSource;
    }

    protected override MyEntities CreateDataSource()
    {
         return _dataSource;
    }

    [WebGet]
    [SingleResult]
    public Team GetTeam(string name)
    {
        return CurrentDataSource.Teams.SingleOrDefault(p => p.Name == name);
    }
}

If CreateDataSource gets called in the base constructor, you may have to use a static and be careful about clearing state, but I bet this works as is.

如果在基本构造函数中调用CreateDataSource，您可能需要使用静态方法，并且要注意清理状态，但是我打赌这是正确的。

#1