require "spec_helper"

app_require "tasks/fetch_feed"

describe FetchFeed do

describe "#fetch" do

let(:daring_fireball) do

double(url: "http://daringfireball.com/feed",

last_fetched: Time.new(2013,1,1),

stories: [])

end

before do

StoryRepository.stub(:add)

FeedRepository.stub(:update_last_fetched)

FeedRepository.stub(:set_status)

end

context "when feed has not been modified" do

it "should not try to fetch posts" do

parser = double(fetch_and_parse: 304)

StoryRepository.should_not_receive(:add)

FetchFeed.new(daring_fireball, parser)

end

end

context "when no new posts have been added" do

it "should not add any new posts" do

fake_feed = double(last_modified: Time.new(2012, 12, 31))

parser = double(fetch_and_parse: fake_feed)

FindNewStories.any_instance.stub(:new_stories).and_return([])

StoryRepository.should_not_receive(:add)

FetchFeed.new(daring_fireball, parser).fetch

end

end

context "when new posts have been added" do

let(:now) { Time.now }

let(:new_story){ double }

let(:old_story) { double }

let(:fake_feed) { double(last_modified: now, entries: [new_story, old_story]) }

let(:fake_parser) { double(fetch_and_parse: fake_feed) }

before { FindNewStories.any_instance.stub(:new_stories).and_return([new_story]) }

it "should only add posts that are new" do

StoryRepository.should_receive(:add).with(new_story, daring_fireball)

StoryRepository.should_not_receive(:add).with(old_story, daring_fireball)

FetchFeed.new(daring_fireball, fake_parser).fetch

end

it "should update the last fetched time for the feed" do

FeedRepository.should_receive(:update_last_fetched)

.with(daring_fireball, now)

FetchFeed.new(daring_fireball, fake_parser).fetch

end

end

context "feed status" do

it "sets the status to green if things are all good" do

fake_feed = double(last_modified: Time.new(2012, 12, 31))

parser = double(fetch_and_parse: fake_feed)

FeedRepository.should_receive(:set_status)

.with(:green, daring_fireball)

FetchFeed.new(daring_fireball, parser).fetch

end

it "sets the status to red if things go wrong" do

parser = double(fetch_and_parse: 404)

FeedRepository.should_receive(:set_status)

.with(:red, daring_fireball)

FetchFeed.new(daring_fireball, parser).fetch

end

end

end

end