1module Spank
 2  describe Proxy do
 3    subject { Proxy.new(target) }
 4    let(:target) { double("target", :greet => nil) }
 5
 6    context "when invoking a method" do
 7      before { subject.greet("blah") }
 8
 9      it "sends the message to the target" do
10        expect(target).to have_received(:greet).with("blah")
11      end
12    end
13
14    context "when an interceptor is registered" do
15      context "when invoking a method" do
16        let(:interceptor) { double("interceptor", intercept: "") }
17
18        before :each do
19          subject.add_interceptor(:greet, interceptor)
20          subject.greet("blah")
21        end
22        it "allows the interceptor to intercept the call" do
23          expect(interceptor).to have_received(:intercept)
24        end
25      end
26
27      context "when invoking a method with a block" do
28        it "passes the block to the target" do
29          proxy = Proxy.new([])
30          expect do
31            proxy.each do |x|
32              raise StandardError
33            end
34          end.to raise_error(StandardError)
35        end
36      end
37    end
38
39    context "when invoking a method that is not defined on the target" do
40      it "raises an error" do
41        expect { Proxy.new("blah").goodbye }.to raise_error(NoMethodError)
42      end
43    end
44  end
45end