Hi All,
I'm using sinon.js as a way to stub out dependencies in my Mocha tests. I
prefer the 'spy' approach over a classic mock approach, as the introspection of
the spy seems clearer and affords more flexibility than the somewhat
backward-thinking with classic mock objects.
That said, I wonder if I'm using it incorrectly when it comes to creating test
spies for whole objects. Let's say I have a test dependency that has 4 methods
on it and I want to stub each of those methods and make assertions on one or
two of them. Currently I'm doing this:
var spyObj = {
aMethod: sinon.spy(),
otherMethod: sinon.spy(),
whatever: sinon.spy()
};
Then I just ask things like spyObj.aMethod.calledWith(a, b, c).
Is there a better way to mock out an entire class than repeating the names of
the methods in the test suite itself? It looks like sinon.stub() tries to
iterate over all the member of a given object, but that doesn't seem to work as
a way to get all methods for most objects in more modern JS runtimes, like V8,
unless the object is actually something enumerable. It also tries to monkey
patch the actual object, rather than returning an equivalent one, which is
somewhat undesirable.
It would be good to be able to do something like:
var spyObject = sinon.spy(MyClass.prototype);
How does one find all methods of a constructor/prototype in Node.js, in order
to make a wrapper like the above?
This is more about stubbing out logic, than testing invocations on lots of
methods (which I try to limit to one, or at a push two). For example, things
that might do unwanted I/O, or require additional complex fixtures if executed.
Regards,
Chris
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