Question

如何测试属性（通常返回浮点值）会在从C ++-CLI调用的NUnit测试中引发异常？我尝试了以下感觉它应该工作：

System::Type^ type = System::NotImplementedException::typeid;
NUnit::Framework::TestDelegate^ delegateToTest = gcnew NUnit::Framework::TestDelegate(this, &(MyClass::MyProperty::get));
Assert::Throws(type, delegateToTest);

...但是这给了我：

error C3352: 'float MyClass::MyProperty::get(void)' : the specified function does not match the delegate type 'void (void)'

Answer 1

Assert :: Throws仅适用于返回void的方法。您试图将它与返回浮点数的方法一起使用。

简单的解决方案是将读取的属性包装在方法中，并声明包装方法抛出异常。

void ReadMyProperty()
{
    float ignored = this.MyProperty;
}

System::Type^ type = System::NotImplementedException::typeid;
NUnit::Framework::TestDelegate^ delegateToTest = 
    gcnew NUnit::Framework::TestDelegate(this, &(MyClass::ReadMyProperty));
Assert::Throws(type, delegateToTest);

Answer 2

您可以使用Assert :: Throws方法。您必须创建一个匹配此委托的方法

void MethodThatThrows()
{
  MyClass::MyProperty::get;
}

void Test()
{
  System::Type^ type = System::NotImplementedException::typeid;
  NUnit::Framework::TestDelegate^ delegateToTest = gcnew NUnit::Framework::TestDelegate(this, MethodThatThrows);
  Assert::Throws(type, delegateToTest);
}

请参阅：Exception Asserts (NUnit 2.5)

如何测试属性是否在NUnit测试中引发异常？

2 个答案: