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require "spec_helper"
describe "a double receiving to_ary" do
shared_examples "to_ary" do
it "returns nil" do
expect do
expect(obj.to_ary).to be_nil
end.to raise_error(NoMethodError)
end
it "doesn't respond" do
expect(obj).not_to respond_to(:to_ary)
end
it "can be overridden with a stub" do
Spy::Subroutine.new(obj, :to_ary).hook(force: true).and_return(:non_nil_value)
expect(obj.to_ary).to be(:non_nil_value)
end
it "responds when overriden" do
Spy::Subroutine.new(obj, :to_ary).hook(force: true).and_return(:non_nil_value)
expect(obj).to respond_to(:to_ary)
end
it "supports Array#flatten" do
obj = Spy.double('foo')
expect([obj].flatten).to eq([obj])
end
end
context "double as_null_object" do
let(:obj) { Spy.double('obj').as_null_object }
include_examples "to_ary"
end
context "double without as_null_object" do
let(:obj) { Spy.double('obj') }
include_examples "to_ary"
end
end
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