finally, I solved this code.
require 'rspec'
class Ary
attr_reader :ary
def initialize
@count = 0
@ary = []
increment
end
def increment
@ary << @count
@count += 1
end
end
describe Ary, "#ary" do
subject{ Ary.new }
it "should increment the ary" do
# expect { subject.increment }.to change(subject,
:ary).from([0]).to([0,1]) # fail
expect { subject.increment }.to change{ subject.ary.clone
}.from([0]).to([0,1])
end
it "should increment the ary by [1]" do
expect { subject.increment }.to change{ subject.ary.clone }.by([1])
end
end
On Mon, Mar 21, 2011 at 10:54 AM, niku -E:) <[email protected]> wrote:
> Sorry. Test comment is incorrect.
> This is intentional test.
>
> require 'rspec'
>
> class Ary
> attr_reader :ary
> def initialize
> @count = 0
> @ary = []
> increment
> end
> def increment
> @ary << @count
> @count += 1
> end
> end
>
> describe Ary, "#ary" do
> subject{ Ary.new }
> it "should increment the ary" do
> # expect { subject.increment }.to change(subject, :ary).from([0]).to([0,1])
> subject.ary.should == [0]
> subject.increment
> subject.ary.should == [0,1]
> end
> end
>
> On Mon, Mar 21, 2011 at 10:41 AM, niku -E:) <[email protected]> wrote:
>> I understand that "expect{}.to change()" can't test "destructive method".
>> So, I should write test like that. correct?
>>
>> require 'rspec'
>>
>> class Ary
>> attr_reader :ary
>> def initialize
>> @count = 0
>> @ary = []
>> increment
>> end
>> def increment
>> @ary << @count
>> @count += 1
>> end
>> end
>>
>> describe Ary, "#ary" do
>> subject{ Ary.new }
>> it "should increment the ary" do
>> # expect { subject.increment }.to change(subject, :ary).from([]).to([0])
>> subject.ary.should == [0]
>> subject.increment
>> subject.ary.should == [0,1]
>> end
>> end
>>
>> On Wed, Mar 16, 2011 at 2:41 AM, Justin Ko <[email protected]> wrote:
>>>
>>>
>>> On Tue, Mar 15, 2011 at 10:08 AM, Justin Ko <[email protected]> wrote:
>>>>
>>>>
>>>> On Tue, Mar 15, 2011 at 8:57 AM, niku -E:) <[email protected]> wrote:
>>>>>
>>>>> Hi.
>>>>>
>>>>> I'm using ruby1.9.2 and rspec2.5.1
>>>>> I want to use "expect{}.to change().from().to()" like this
>>>>>
>>>>> https://gist.github.com/870897
>>>>>
>>>>> When Int class, it passed.
>>>>> When Ary class, it failed.
>>>>>
>>>>> Why was Ary test failed and How do I pass this test?
>>>>>
>>>>> regards.
>>>>> _______________________________________________
>>>>> rspec-users mailing list
>>>>> [email protected]
>>>>> http://rubyforge.org/mailman/listinfo/rspec-users
>>>>
>>>> Your Ary @ary variable is initialized as "[]". So of course calling
>>>> increment on it will change it to "[0]". For your spec to pass, initialize
>>>> it as "[0]"
>>>
>>> I'm completely wrong. Didn't read your code properly. Where is the delete
>>> link? :)
>>
>
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