我是Rhino Mocks的新手,所以我可能完全错过了一些东西。
假设我的界面有六个属性:
public interface IFoo {
string Foo1 { get; } // Required non-null or empty
string Foo2 { get; } // Required non-null or empty
string Foo3 { get; }
string Foo4 { get; }
int Foo5 { get; }
int Foo6 { get; }
}
一个实现,它采用类似的对象但没有相同的约束并创建一个IFoo实例:
public interface IFooLikeObject {
string FooLikeObject1 { get; } // Okay non-null or empty
string FooLikeObject2 { get; } // Okay non-null or empty
string FooLikeObject3 { get; }
string FooLikeObject4 { get; }
string FooLikeObject5 { get; } // String here instead of int
string FooLikeObject6 { get; } // String here instead of int
}
public class Foo : IFoo {
public Foo(IFooLikeObject fooLikeObject) {
if (string.IsNullOrEmpty(fooLikeObject.Foo1)) {
throw new ArgumentException("fooLikeObject.Foo1 is a required element and must not be null.")
}
if (string.IsNullOrEmpty(Foo2)) {
throw new ArgumentException("fooLikeObject.Foo2 is a required element and must not be null")
}
// Make all the assignments, including conversions from string to int...
}
}
现在,在我的测试中,我想测试在适当的时间抛出异常,以及在从字符串到int的失败转换期间抛出的异常。
所以我需要太多的IFooLikeObject来返回我当前没有测试的值的有效值,因为我不想在每个测试方法中复制这个代码,所以我把它提取出来用于单独的方法。
public IFooLikeObject CreateBasicIFooLikeObjectStub(MockRepository mocks) {
IFooLikeObject stub = mocks.Stub<IFooLikeObject>();
// These values are required to be non-null
SetupResult.For(stub.FooLikeObject1).Return("AValidString");
SetupResult.For(stub.FooLikeObject2).Return("AValidString2");
SetupResult.For(stub.FooLikeObject5).Return("1");
SetupResult.For(stub.FooLikeObject6).Return("1");
}
这足以测试Foo3和Foo4,但在测试Foo1,2,5或6时,我得到:
System.InvalidOperationException : The result for IFooLikeObject.get_FooLikeObject1(); has already been setup. Properties are already stubbed with PropertyBehavior by default, no action is required
例如:
[Test]
void Constructor_FooLikeObject1IsNull_Exception() {
MocksRepository mocks = new MocksRepository();
IFooLikeObject fooLikeObjectStub = CreateBasicIFooLikeObjectStub(mocks);
// This line causes the exception since FooLikeObject1 has already been set in CreateBasicIFooLikeObjectStub()
SetupResult.For(fooLikeObjectStub.FooLikeObject1).Return(null);
mocks.ReplayAll();
Assert.Throws<ArgumentException>(delegate { new Foo(fooLikeObjectStub); });
}
如何设置它以便我可以覆盖已经设置了返回值的单个属性,而不必重做所有其他属性?
答案 0 :(得分:1)
这可以使用Repeat.Any()
构造完成。
我没有使用SetupResult.For语法对此进行测试,但它适用于lambda语法:
public IFooLikeObject CreateBasicIFooLikeObjectStub(MockRepository) {
IFooLikeObject stub = MockRepository.GenerateStub<IFooLikeObject>();
// These values are required to be non-null
stub.Stub(s => s.FooLikeObject1).Return("AValidString");
stub.Stub(s => s.FooLikeObject2).Return("AValidString2");
stub.Stub(s => s.FooLikeObject5).Return("1");
stub.Stub(s => s.FooLikeObject6).Return("1");
}
[Test]
void Constructor_FooLikeObject1IsNull_Exception() {
IFooLikeObject fooLikeObjectStub = CreateBasicIFooLikeObjectStub();
// This line no longer causes an exception
stub.Stub(s => s.FooLikeObject1).Return(null).Repeat.Any(); // The Repeat.Any() is key. Otherwise the value wont be overridden.
Assert.Throws<ArgumentException>(delegate { new Foo(fooLikeObjectStub); });
}
我发现的唯一警告是你不能做两次。
答案 1 :(得分:0)
我可能会遗漏一些东西,但你试过这样做吗?
var stub = mocks.Stub<IFooLikeObject>();
stub.FooLikeObject1 = "AValidString";
stub.FooLikeObject2 = "AValidString2";
stub.FooLikeObject5 = "1";
stub.FooLikeObject6 = "1";
使用存根,您只需将属性设置为您希望它们直接存在的属性。
如果属性是只读的,你可以这样做:
var stub = mocks.Stub<IFooLikeObject>();
stub.Stub( x => x.FooLikeObject1).Return("AValidString");
stub.Stub( x => x.FooLikeObject2).Return("AValidString2");
stub.Stub( x => x.FooLikeObject5).Return("1");
stub.Stub( x => x.FooLikeObject6).Return("1");