feed_handler_test.rb
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require File.dirname(__FILE__) + '/../test_helper'
class FeedHandlerTest < Test::Unit::TestCase
class FeedContainer
attr_accessor :limit
attr_accessor :fetched_at
attr_accessor :feed_title
attr_accessor :feed_items
attr_accessor :address
def initialize
self.limit = 5
self.feed_title = "Feed Container Mocked"
self.feed_items = []
self.address = 'test/fixtures/files/feed.xml'
end
def add_item(title, link, date, content)
self.feed_items << title
end
end
def setup
@handler = FeedHandler.new
@container = FeedContainer.new
end
attr_reader :handler, :container
should 'fetch feed content' do
content = handler.fetch(container.address)
assert_match /<description>Feed content<\/description>/, content
assert_match /<title>Feed for unit tests<\/title>/, content
end
should 'parse feed content' do
content = ""
open(container.address) do |s| content = s.read end
parse = handler.parse(content)
assert_equal 'Feed for unit tests', parse.title
assert_equal 'http://localhost/feed-test', parse.link
assert_equal 'Last POST', parse.items[0].title
end
should 'process feed and populate container' do
handler.process(container)
assert_equal 'Feed for unit tests', container.feed_title
assert_equal ["Last POST", "Second POST", "First POST"], container.feed_items
end
should 'raise exception when parser nil' do
handler = FeedHandler.new
assert_raise FeedHandler::ParseError do
handler.parse(nil)
end
end
should 'raise exception when parser invalid content' do
handler = FeedHandler.new
assert_raise FeedHandler::ParseError do
handler.parse('<invalid>content</invalid>')
end
end
should 'raise exception when fetch nil' do
handler = FeedHandler.new
assert_raise FeedHandler::FetchError do
handler.fetch(nil)
end
end
should 'raise exception when fetch invalid address' do
handler = FeedHandler.new
assert_raise FeedHandler::FetchError do
handler.fetch('bli://invalid@address')
end
end
should 'save only latest N posts from feed' do
container.limit = 1
handler.process(container)
assert_equal 1, container.feed_items.size
end
end