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require "spec_helper"
describe "a double receiving to_ary" do
shared_examples "to_ary" do
it "can be overridden with a stub" do
obj.stub(:to_ary) { :non_nil_value }
expect(obj.to_ary).to be(:non_nil_value)
end
it "responds when overriden" do
obj.stub(:to_ary) { :non_nil_value }
expect(obj).to respond_to(:to_ary)
end
it "supports Array#flatten" do
obj = double('foo')
expect([obj].flatten).to eq([obj])
end
end
context "double as_null_object" do
let(:obj) { double('obj').as_null_object }
include_examples "to_ary"
it "does respond to to_ary" do
expect(obj).to respond_to(:to_ary)
end
it "does respond to to_a" do
expect(obj).to respond_to(:to_a)
end
it "returns nil" do
expect(obj.to_ary).to eq nil
end
end
context "double without as_null_object" do
let(:obj) { double('obj') }
include_examples "to_ary"
it "doesn't respond to to_ary" do
expect(obj).not_to respond_to(:to_ary)
end
it "doesn't respond to to_a", :if => ( RUBY_VERSION.to_f > 1.8 ) do
expect(obj).not_to respond_to(:to_a)
end
it "raises " do
expect { obj.to_ary }.to raise_error(NoMethodError)
end
end
end
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