I agree with Paul and David. I would use strategy (2) with Machinist'd
data or stubs.
1. Set up two items, out of order.
2. Assert ordered(items) swaps them.
If you are concerned about further cases such as numerical sorting
versus string sorting, or edge cases, then put those in too, but
David's code looks good to me, as a minimum check.
My only addition is that sometimes I stick a .map(&:name) on the end
of my subject to make the output nicer.
describe OrderedFooList
let(:shorts) { stub(:name => "Shorts") }
let(:socks) { stub(:name => "socks") }
describe '#ordered' do
subject { OrderedFooList.new(input).ordered.map(&:name) }
context 'when given socks and Shorts in that order' do
let(:input) { [socks, shorts] }
it { should == ['Shorts', 'socks'] }
end
end
end
-Greg
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