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require 'spec_helper'
describe Bogus::ProxyClass do
module SampleModule
class GrandLibrary
SAMPLE_CONSTANT = "foo"
def checkout(book, user)
:checkouted
end
def self.find_by_address(address)
:the_library
end
def self.find_by_isbn(isbn)
raise StandardError
end
end
end
let(:proxy_class) { Bogus::ProxyClass.new(:fake_name, SampleModule::GrandLibrary, create_recording_proxy) }
let(:create_recording_proxy) do
lambda {|instance, fake_name| Bogus::RecordingProxy.new(instance, fake_name, interactions_repository) }
end
let(:interactions_repository) { FakeRepository.new }
it "returns the proxy" do
expect(proxy_class.new.checkout("Moby Dick", "Bob")).to eq :checkouted
end
it "records interactions with created objects" do
proxy_class.new.checkout("Moby Dick", "Bob")
expect(interactions_repository).to have_recorded(:fake_name, :checkout, "Moby Dick", "Bob")
end
it "responds to every method that the original class responds to" do
expect(proxy_class).to respond_to(:find_by_address)
end
it "delegates interactions with the proxy class to wrapped class" do
expect(proxy_class.find_by_address("some address")).to eq :the_library
end
it "records interactions with the proxy class" do
proxy_class.find_by_address("some address")
expect(interactions_repository).to have_recorded(:fake_name, :find_by_address, "some address")
end
it "records return values" do
proxy_class.find_by_address("some address")
expect(interactions_repository.return_value(:fake_name, :find_by_address, "some address")).to eq :the_library
end
it "re-raises exceptions" do
expect {
proxy_class.find_by_isbn("some isbn")
}.to raise_error(StandardError)
end
it "records raised exceptions" do
proxy_class.find_by_isbn("some isbn") rescue nil
expect {
interactions_repository.return_value(:fake_name, :find_by_isbn, "some isbn")
}.to raise_error(StandardError)
end
it "allows accessing the constants defined on proxied class" do
expect(proxy_class::SAMPLE_CONSTANT).to eq "foo"
end
class FakeRepository
def initialize
@recordings = []
end
def record(fake_name, method, *args, &block)
@recordings << [fake_name, method, args, block]
end
def has_recorded?(fake_name, method, *args)
!!find(fake_name, method, *args)
end
def return_value(fake_name, method, *args)
find(fake_name, method, *args).last.call
end
def find(fake_name, method, *args)
@recordings.find do |f, m, a, b|
[f, m, a] == [fake_name, method, args]
end
end
end
end
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