我正在测试遗留代码,我正在处理一个实例化另一个类的类。我相信这是可以使用Microsoft Fakes测试的,但我想知道NSubstitute是否有这种能力。我相信答案是肯定的,但需要确定。
public class ClassA
{
public int MethodA()
{
int reportId = this.MethodB();
return reportId;
}
public virtual int MethodB()
{
ClassC c = new ClassC();
return c.MethodA();
}
}
public class ClassC
{
public virtual int MethodA()
{
return 2;
}
}
[Test]
public void Test_ClassA()
{
ClassA subclassA = new ClassA();
var subclassC = Substitute.For<ClassC>(); //this is pointless the way I have it here
subclassC.MethodA().Returns(1); //this is pointless the way I have it here
int outValue = subclassA.MethodA();
Assert.AreEqual(outValue, 1); //outvalue is 2 but I would like it to be 1 if possible using Nsubstitute
}
答案 0 :(得分:3)
可以使用partial substitution覆盖类中的虚方法:只需确保不能通过指定不能调用基类来调用基本代码:
var A = Substitute.ForPartsOf<ClassA>();
var C = Substitute.ForPartsOf<ClassC>();
C.When(c => c.MethodA()).DoNotCallBase();
C.MethodA().Returns(10);
A.When(a => a.MethodB()).DoNotCallBase();
var cResult = C.MethodA();
A.MethodB().Returns(cResult);
Console.WriteLine(A.MethodB());
Console.WriteLine(C.MethodA());