On Sunday, February 9, 2014 6:40:13 AM UTC-8, siva wrote:
>
>
>
> Thanks Xavier it worked. But I need a small clarification. How could we
> stub chain of methods where each method asks a set of arguments?
>
> On Friday, 7 February 2014 08:55:28 UTC+5:30, Xavier Shay wrote:
>>
>>
>> On 5/02/14 10:40 PM, siva wrote:
>>
>>
>> Hi Xavier
>>
>> Thanks for your reply.
>>
>> I want assert whether `calculate` has been called no. of times that
>> loop has been iterated with the same parameters every time.
>>
>> And on class `InterestAmount` initializer I set the parameters in
>> instance variables like as follows so that I can use same instance
>> variables across all methods in `InterestAmount` class.
>>
>> class InterestAmount
>> def initialize(installment, date, project)
>> @installment = installment
>> @project = project
>> @date = date
>> end
>> end
>>
>> If you do:
>>
>> class InterestAmount
>> def self.calculate(*args); new(*args).calculate; end
>> #...
>> end
>>
>> you hide the initializer, and subsequently your tests get much nicer.
>> (i.e. listening to the test leads to a nicer interface)
>>
>>
>>
>>
>>
>> On Wednesday, 5 February 2014 10:42:44 UTC+5:30, Xavier Shay wrote:
>>>
>>>
>>> On 4/02/14 1:05 AM, siva wrote:
>>> >
>>> >
>>> > Hi all
>>> >
>>> > In my controller I have code as below:
>>> >
>>> > # app/controllers/bookings_controller.rb
>>> >
>>> > @booking.unit_installments.each do |i|
>>> > InterestAmount.new(i, Date.today, project).calculate
>>> > end
>>> >
>>> > I have seen `stub_chain` method but I didn't find how to stub
>>> > chain methods with arguments and how to verify chain methods with
>>> > arguments as well. Could you help me?
>>> What are you trying to test/assert here?
>>> At a first glance, I'd refactor InterestAmount to provide an interface
>>> `InterestAmount.calculate`, then you don't need to use stub_chain, and
>>> also hide your implementation.
>>>
>>> Cheers,
>>> Xavier
>>> >
>>> > Thanks in advance.
>>> > --
>>
>>
You can stub any arbitrary chain of methods by setting up the stubs
individually:
allow(a).to receive(:foo).with(1).and_return(b = double)
allow(b).to receive(:bar).with(2).and_return(c = double)
allow(c).to receive(:baz).with(3).and_return("it worked")
expect(a.foo(1).bar(2).baz(3)).to eq("it worked")
HTH,
Myron
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