public void YouCanTellTheStubToThrowAnExceptionWhenAMethodIsCalled()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Calling the void method will throw exception.
stub.When(s => s.VoidMethod()).Do(x => { throw new InvalidOperationException(); });
// Calling the method with "foo" as the parameter will throw exception.
stub.MethodThatReturnsInteger("foo").Returns(x => { throw new InvalidOperationException(); });
// Call method that throws exception.
Assert.Throws <InvalidOperationException>(stub.VoidMethod);
Assert.Throws <InvalidOperationException>(() => stub.MethodThatReturnsInteger("foo"));
}
public void HandlingRefParametersInStubs()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Here's how you stub an "ref" parameter.
string refi = "input";
stub.When(s => s.MethodWithRefParameter(ref refi)).Do(x => x[0] = "output");
// If you call the method with the specified input argument, it will
// change the parameter to the value you specified.
string param = "input";
stub.MethodWithRefParameter(ref param);
param.Should(Be.EqualTo("output"));
// If I call the method with any other input argument, it won't
// change the value.
param = "some other value";
stub.MethodWithRefParameter(ref param);
param.Should(Be.EqualTo("some other value"));
}
