tdd - Asserting that a method is called exactly one time -

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i want assert method called 1 time. i'm using rhinomocks 3.5.

here's thought work:

[test] public void just_once() {     var key = "id_of_something";      var source = mockrepository.generatestub<isomedatasource>();     source.expect(x => x.getsomethingthattakesalotofresources(key))         .return(new something())         .repeat.once();      var client = new client(soure);      // first call expect client use source     client.getmemything(key);      // second call result should cached     // , source not used     client.getmemything(key); }

i want test fail if second invocation of getmemything() calls source.getsomethingthattakesalotofresources().

here's how i'd verify method called once.

[test] public void just_once() {     // arrange     var = mockrepository.generatemock<isomedatasource>();     a.expect(x => x.getsomethingthattakesalotofresources()).return(new something()).repeat.once();     a.stub(x => x.getsomethingthattakesalotofresources()).throw(new invalidoperationexception("gotcha"));      // act     // first invocation should call getsomethingthattakesalotofresources     a.getmemything();      // second invocation should return cached result     a.getmemything();      // assert     a.verifyallexpectations(); }

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