如何设置 MS Fakes 对象的 return 值？

Question

我已经使用 OData V4 Client Code Generator 生成了一个 OData 客户端代码。生成的代码不能在没有 MS Fakes 的情况下进行单元测试，所以我从中生成了一个假的程序集。现在我遇到了如何实际设置方法的 return 值的问题。

生成代码中的"core"class调用System:

[global::Microsoft.OData.Client.OriginalNameAttribute("System")]
public partial class System : global::Microsoft.OData.Client.DataServiceContext
{
    /// <summary>
    /// Initialize a new System object.
    /// </summary>
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.OData.Client.Design.T4", "2.4.0")]
    public System(global::System.Uri serviceRoot) : 
            base(serviceRoot, global::Microsoft.OData.Client.ODataProtocolVersion.V4)
    {
        this.ResolveName = new global::System.Func<global::System.Type, string>(this.ResolveNameFromType);
        this.ResolveType = new global::System.Func<string, global::System.Type>(this.ResolveTypeFromName);
        this.OnContextCreated();
        this.Format.LoadServiceModel = GeneratedEdmModel.GetInstance;
        this.Format.UseJson();
    }

    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.OData.Client.Design.T4", "2.4.0")]
    [global::Microsoft.OData.Client.OriginalNameAttribute("salesorders")]
    public global::Microsoft.OData.Client.DataServiceQuery<Salesorder> Salesorders
    {
        get
        {
            if ((this._Salesorders == null))
            {
                this._Salesorders = base.CreateQuery<Salesorder>("salesorders");
            }
            return this._Salesorders;
        }
    }
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.OData.Client.Design.T4", "2.4.0")]
    private global::Microsoft.OData.Client.DataServiceQuery<Salesorder> _Salesorders;

    ... continues from here and contains all the strongly typed classes...
}

现在您可以看到属性 Salesorders 是 DataServiceQuery<Salesorder>，它将 Linq 表达式作为参数。

我尝试手动设置查询，但它不起作用，而且在测试用例中指定实际查询似乎有点多余。基本上，我所需要的只是 return 列表（或可枚举）的方法，就像我可以使用起订量时会做的那样。

编辑：我发现了一篇关于在旧 CRM 代码生成器中使用 Fakes 的旧文章，但在这种情况下它对我帮助不大 (https://zhongchenzhou.wordpress.com/2012/07/10/dynamics-crm-2011-unit-test-part-2-microsoft-fakes-with-linq-query)

    _client = new ODataClient.Microsoft.Dynamics.CRM.Fakes.StubSystem(new System.Uri(...
    _dao = new DataAccess.DataAccess(_client);

            using (ShimsContext.Create())
            {
                var query = from a in _client.Salesorders select a;

                ODataClient.Microsoft.Dynamics.CRM.Fakes.ShimSystem.AllInstances.SalesordersGet = (c) =>
                    {
                        return new Microsoft.OData.Client.DataServiceQuery<Salesorder>( // how?
                    };

// This fails                _dao.GetSalesordersByAccountAndContactId(Guid.NewGuid().ToString(), Guid.NewGuid().ToString());
            }

Answer 1

using (ShimsContext.Create())
{
    var client = new ODataClient.Microsoft.Dynamics.CRM.Fakes.ShimSystem();
    IDataAccess dao = new DataAccess.DataAccess(client);

    var salesorders = new List<Salesorder>
    {
        new Salesorder()
    };

    IQueryable<Salesorder> queryableData = salesorders.AsQueryable();

    var queryShim = new Microsoft.OData.Client.Fakes.ShimDataServiceQuery<Salesorder>();
    queryShim.ExpressionGet = () => queryableData.Expression;
    queryShim.ElementTypeGet = () => queryableData.ElementType;
    queryShim.ProviderGet = () => queryableData.Provider;
    queryShim.GetEnumerator = () => queryableData.GetEnumerator();

    DataClient.Microsoft.Dynamics.CRM.Fakes.ShimSystem.SalesordersGet = () => queryShim;
}

如何设置 MS Fakes 对象的 return 值？

How to set the return value of MS Fakes object?

c#

unit-testing

odata

microsoft-fakes