On Oct 30, 2010, at 11:40 AM, Andrew Wagner wrote:
> Ok, so here's the scenario. I have a top-level module, with a method called
> load_file. It should take a file name, get the YAML module (Syck) to parse
> it, and then send the result to a class, which should convert that result
> into a series of objects.
>
> I'm not sure what specs, if any, I should write for load_file. I can get into
> the nitty gritty details of exactly what methods it should be calling, but
> that seems brittle. I can skip all that and just make assertions about the
> final series of objects, but I'd rather put those specs on the class that's
> actually doing the conversion.
>
> Suggestions? Here's the code that I (think I) want to drive out:
>
> module BTree
> def self.load_file file_name
> raw = YAML::load_file file_name
> tree = BehaviorTreeCreator.new(raw).create
> end
> end
One approach would be:
describe BTree do
describe "::load_file" do
let(:filename) { '/tmp/btree_example.yml' }
let(:content) { "---\na: 1\n" }
before { File.open(filename,'w') {|f| f.write content } }
after { File.delete filename }
it "reads and parses the content of the file" do
BTree.load_file(filename).should
eq(BehaviorTreeCreator.new(content).create
end
end
end
Assuming there are specs for BehaviorTreeCreator.new(content).create, then this
tells the story pretty well without being terribly invasive.
WDYT?
David
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