C# NSSubstitute:收到的检查方法错误

我有一个测试，NSubstitute在一个假类中检查错误调用。当我像下面的代码一样执行测试时，

接收（…）

方法检查值

factory.featureClassName

是否返回一次

[Test]
public void CreateDataController_WhenCalled_CreatesServiceSettings()
{
    var factory = Substitute.ForPartsOf<AbstractDataServiceFactoryFake>("fileName");

    factory.CreateDataController();

    factory.Received(1).CreateServiceSettings("fileName", factory.FeatureClassName);
}

---

似乎，

received（）

方法没有直接连接到调用后给出的方法。有人能解释一下为什么会发生这种情况吗？

这是NSubstitute语法的一个限制

让我们分析一下第二个代码示例会发生什么：

factory
    .Received(1)    // ... check the next call has previously been received
    .CreateServiceSettings("fileName", className) 
                    // call is made to CreateServiceSettings, NSub checks
                    // it was received.

在第一个代码示例中，我们得到以下结果：

factory
    .Received(1)    // ... check the next call has previously been received
    .CreateServiceSettings("fileName", factory.FeatureClassName) 
                    // before CreateServiceSettings is invoked, its arguments
                    // must be evaluated. So factory.FeatureClassName
                    // is called next and NSubstitute checks that.

换句话说，NSubstitute看到的第二个代码示例如下：

var _ = factory.Received(1).FeatureClassName;
factory.CreateServiceSettings("fileName", _);

---

为了避免这种情况，在断言（如

接收的

）或配置（如

返回的

）过程中避免调用替换项是很有用的。

这是NSSubstitute语法的一个限制

让我们分析一下第二个代码示例会发生什么：

factory
    .Received(1)    // ... check the next call has previously been received
    .CreateServiceSettings("fileName", className) 
                    // call is made to CreateServiceSettings, NSub checks
                    // it was received.

在第一个代码示例中，我们得到以下结果：

factory
    .Received(1)    // ... check the next call has previously been received
    .CreateServiceSettings("fileName", factory.FeatureClassName) 
                    // before CreateServiceSettings is invoked, its arguments
                    // must be evaluated. So factory.FeatureClassName
                    // is called next and NSubstitute checks that.

换句话说，NSubstitute看到的第二个代码示例如下：

var _ = factory.Received(1).FeatureClassName;
factory.CreateServiceSettings("fileName", _);

为了避免这种情况，在断言（如

接收的

）或配置（如

返回的

）期间，避免调用替换项是很有用的