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require 'spec_helper'
describe Agents::WebsiteAgent do
describe "checking without basic auth" do
before do
stub_request(:any, /xkcd/).to_return(:body => File.read(Rails.root.join("spec/data_fixtures/xkcd.html")), :status => 200)
@valid_options = {
'name' => "XKCD",
'expected_update_period_in_days' => "2",
'type' => "html",
'url' => "http://xkcd.com",
'mode' => 'on_change',
'extract' => {
'url' => { 'css' => "#comic img", 'value' => "@src" },
'title' => { 'css' => "#comic img", 'value' => "@alt" },
'hovertext' => { 'css' => "#comic img", 'value' => "@title" }
}
}
@checker = Agents::WebsiteAgent.new(:name => "xkcd", :options => @valid_options, :keep_events_for => 2)
@checker.user = users(:bob)
@checker.save!
end
it_behaves_like WebRequestConcern
describe "validations" do
before do
@checker.should be_valid
end
it "should validate the integer fields" do
@checker.options['expected_update_period_in_days'] = "2"
@checker.should be_valid
@checker.options['expected_update_period_in_days'] = "nonsense"
@checker.should_not be_valid
end
it "should validate uniqueness_look_back" do
@checker.options['uniqueness_look_back'] = "nonsense"
@checker.should_not be_valid
@checker.options['uniqueness_look_back'] = "2"
@checker.should be_valid
end
it "should validate mode" do
@checker.options['mode'] = "nonsense"
@checker.should_not be_valid
@checker.options['mode'] = "on_change"
@checker.should be_valid
@checker.options['mode'] = "all"
@checker.should be_valid
@checker.options['mode'] = ""
@checker.should be_valid
end
it "should validate the force_encoding option" do
@checker.options['force_encoding'] = ''
@checker.should be_valid
@checker.options['force_encoding'] = 'UTF-8'
@checker.should be_valid
@checker.options['force_encoding'] = ['UTF-8']
@checker.should_not be_valid
@checker.options['force_encoding'] = 'UTF-42'
@checker.should_not be_valid
end
end
describe "#check" do
it "should check for changes (and update Event.expires_at)" do
lambda { @checker.check }.should change { Event.count }.by(1)
event = Event.last
sleep 2
lambda { @checker.check }.should_not change { Event.count }
update_event = Event.last
update_event.expires_at.should_not == event.expires_at
end
it "should always save events when in :all mode" do
lambda {
@valid_options['mode'] = 'all'
@checker.options = @valid_options
@checker.check
@checker.check
}.should change { Event.count }.by(2)
end
it "should take uniqueness_look_back into account during deduplication" do
@valid_options['mode'] = 'all'
@checker.options = @valid_options
@checker.check
@checker.check
event = Event.last
event.payload = "{}"
event.save
lambda {
@valid_options['mode'] = 'on_change'
@valid_options['uniqueness_look_back'] = 2
@checker.options = @valid_options
@checker.check
}.should_not change { Event.count }
lambda {
@valid_options['mode'] = 'on_change'
@valid_options['uniqueness_look_back'] = 1
@checker.options = @valid_options
@checker.check
}.should change { Event.count }.by(1)
end
it "should log an error if the number of results for a set of extraction patterns differs" do
@valid_options['extract']['url']['css'] = "div"
@checker.options = @valid_options
@checker.check
@checker.logs.first.message.should =~ /Got an uneven number of matches/
end
it "should accept an array for url" do
@valid_options['url'] = ["http://xkcd.com/1/", "http://xkcd.com/2/"]
@checker.options = @valid_options
lambda { @checker.save! }.should_not raise_error;
lambda { @checker.check }.should_not raise_error;
end
it "should parse events from all urls in array" do
lambda {
@valid_options['url'] = ["http://xkcd.com/", "http://xkcd.com/"]
@valid_options['mode'] = 'all'
@checker.options = @valid_options
@checker.check
}.should change { Event.count }.by(2)
end
it "should follow unique rules when parsing array of urls" do
lambda {
@valid_options['url'] = ["http://xkcd.com/", "http://xkcd.com/"]
@checker.options = @valid_options
@checker.check
}.should change { Event.count }.by(1)
end
end
describe 'encoding' do
it 'should be forced with force_encoding option' do
huginn = "\u{601d}\u{8003}"
stub_request(:any, /no-encoding/).to_return(:body => {
:value => huginn,
}.to_json.encode(Encoding::EUC_JP), :headers => {
'Content-Type' => 'application/json',
}, :status => 200)
site = {
'name' => "Some JSON Response",
'expected_update_period_in_days' => "2",
'type' => "json",
'url' => "http://no-encoding.example.com",
'mode' => 'on_change',
'extract' => {
'value' => { 'path' => 'value' },
},
'force_encoding' => 'EUC-JP',
}
checker = Agents::WebsiteAgent.new(:name => "No Encoding Site", :options => site)
checker.user = users(:bob)
checker.save!
checker.check
event = Event.last
event.payload['value'].should == huginn
end
it 'should be overridden with force_encoding option' do
huginn = "\u{601d}\u{8003}"
stub_request(:any, /wrong-encoding/).to_return(:body => {
:value => huginn,
}.to_json.encode(Encoding::EUC_JP), :headers => {
'Content-Type' => 'application/json; UTF-8',
}, :status => 200)
site = {
'name' => "Some JSON Response",
'expected_update_period_in_days' => "2",
'type' => "json",
'url' => "http://wrong-encoding.example.com",
'mode' => 'on_change',
'extract' => {
'value' => { 'path' => 'value' },
},
'force_encoding' => 'EUC-JP',
}
checker = Agents::WebsiteAgent.new(:name => "Wrong Encoding Site", :options => site)
checker.user = users(:bob)
checker.save!
checker.check
event = Event.last
event.payload['value'].should == huginn
end
end
describe '#working?' do
it 'checks if events have been received within the expected receive period' do
stubbed_time = Time.now
stub(Time).now { stubbed_time }
@checker.should_not be_working # No events created
@checker.check
@checker.reload.should be_working # Just created events
@checker.error "oh no!"
@checker.reload.should_not be_working # There is a recent error
stubbed_time = 20.minutes.from_now
@checker.events.delete_all
@checker.check
@checker.reload.should be_working # There is a newer event now
stubbed_time = 2.days.from_now
@checker.reload.should_not be_working # Two days have passed without a new event having been created
end
end
describe "parsing" do
it "parses CSS" do
@checker.check
event = Event.last
event.payload['url'].should == "http://imgs.xkcd.com/comics/evolving.png"
event.payload['title'].should == "Evolving"
event.payload['hovertext'].should =~ /^Biologists play reverse/
end
it "parses XPath" do
@valid_options['extract'].each { |key, value|
value.delete('css')
value['xpath'] = "//*[@id='comic']//img"
}
@checker.options = @valid_options
@checker.check
event = Event.last
event.payload['url'].should == "http://imgs.xkcd.com/comics/evolving.png"
event.payload['title'].should == "Evolving"
event.payload['hovertext'].should =~ /^Biologists play reverse/
end
it "should turn relative urls to absolute" do
rel_site = {
'name' => "XKCD",
'expected_update_period_in_days' => "2",
'type' => "html",
'url' => "http://xkcd.com",
'mode' => "on_change",
'extract' => {
'url' => {'css' => "#topLeft a", 'value' => "@href"},
}
}
rel = Agents::WebsiteAgent.new(:name => "xkcd", :options => rel_site)
rel.user = users(:bob)
rel.save!
rel.check
event = Event.last
event.payload['url'].should == "http://xkcd.com/about"
end
it "should return an integer value if XPath evaluates to one" do
rel_site = {
'name' => "XKCD",
'expected_update_period_in_days' => 2,
'type' => "html",
'url' => "http://xkcd.com",
'mode' => "on_change",
'extract' => {
'num_links' => {'css' => "#comicLinks", 'value' => "count(./a)"}
}
}
rel = Agents::WebsiteAgent.new(:name => "xkcd", :options => rel_site)
rel.user = users(:bob)
rel.save!
rel.check
event = Event.last
event.payload['num_links'].should == "9"
end
it "should return all texts concatenated if XPath returns many text nodes" do
rel_site = {
'name' => "XKCD",
'expected_update_period_in_days' => 2,
'type' => "html",
'url' => "http://xkcd.com",
'mode' => "on_change",
'extract' => {
'slogan' => {'css' => "#slogan", 'value' => ".//text()"}
}
}
rel = Agents::WebsiteAgent.new(:name => "xkcd", :options => rel_site)
rel.user = users(:bob)
rel.save!
rel.check
event = Event.last
event.payload['slogan'].should == "A webcomic of romance, sarcasm, math, and language."
end
describe "JSON" do
it "works with paths" do
json = {
'response' => {
'version' => 2,
'title' => "hello!"
}
}
stub_request(:any, /json-site/).to_return(:body => json.to_json, :status => 200)
site = {
'name' => "Some JSON Response",
'expected_update_period_in_days' => "2",
'type' => "json",
'url' => "http://json-site.com",
'mode' => 'on_change',
'extract' => {
'version' => {'path' => "response.version"},
'title' => {'path' => "response.title"}
}
}
checker = Agents::WebsiteAgent.new(:name => "Weather Site", :options => site)
checker.user = users(:bob)
checker.save!
checker.check
event = Event.last
event.payload['version'].should == 2
event.payload['title'].should == "hello!"
end
it "can handle arrays" do
json = {
'response' => {
'data' => [
{'title' => "first", 'version' => 2},
{'title' => "second", 'version' => 2.5}
]
}
}
stub_request(:any, /json-site/).to_return(:body => json.to_json, :status => 200)
site = {
'name' => "Some JSON Response",
'expected_update_period_in_days' => "2",
'type' => "json",
'url' => "http://json-site.com",
'mode' => 'on_change',
'extract' => {
:title => {'path' => "response.data[*].title"},
:version => {'path' => "response.data[*].version"}
}
}
checker = Agents::WebsiteAgent.new(:name => "Weather Site", :options => site)
checker.user = users(:bob)
checker.save!
lambda {
checker.check
}.should change { Event.count }.by(2)
event = Event.all[-1]
event.payload['version'].should == 2.5
event.payload['title'].should == "second"
event = Event.all[-2]
event.payload['version'].should == 2
event.payload['title'].should == "first"
end
it "stores the whole object if :extract is not specified" do
json = {
'response' => {
'version' => 2,
'title' => "hello!"
}
}
stub_request(:any, /json-site/).to_return(:body => json.to_json, :status => 200)
site = {
'name' => "Some JSON Response",
'expected_update_period_in_days' => "2",
'type' => "json",
'url' => "http://json-site.com",
'mode' => 'on_change'
}
checker = Agents::WebsiteAgent.new(:name => "Weather Site", :options => site)
checker.user = users(:bob)
checker.save!
checker.check
event = Event.last
event.payload['response']['version'].should == 2
event.payload['response']['title'].should == "hello!"
end
end
end
describe "#receive" do
it "should scrape from the url element in incoming event payload" do
@event = Event.new
@event.agent = agents(:bob_rain_notifier_agent)
@event.payload = { 'url' => "http://xkcd.com" }
lambda {
@checker.options = @valid_options
@checker.receive([@event])
}.should change { Event.count }.by(1)
end
end
end
describe "checking with http basic auth" do
before do
stub_request(:any, /example/).
with(headers: { 'Authorization' => "Basic #{['user:pass'].pack('m').chomp}" }).
to_return(:body => File.read(Rails.root.join("spec/data_fixtures/xkcd.html")), :status => 200)
@valid_options = {
'name' => "XKCD",
'expected_update_period_in_days' => "2",
'type' => "html",
'url' => "http://www.example.com",
'mode' => 'on_change',
'extract' => {
'url' => { 'css' => "#comic img", 'value' => "@src" },
'title' => { 'css' => "#comic img", 'value' => "@alt" },
'hovertext' => { 'css' => "#comic img", 'value' => "@title" }
},
'basic_auth' => "user:pass"
}
@checker = Agents::WebsiteAgent.new(:name => "auth", :options => @valid_options)
@checker.user = users(:bob)
@checker.save!
end
describe "#check" do
it "should check for changes" do
lambda { @checker.check }.should change { Event.count }.by(1)
lambda { @checker.check }.should_not change { Event.count }
end
end
end
describe "checking with headers" do
before do
stub_request(:any, /example/).
with(headers: { 'foo' => 'bar', 'user_agent' => /Faraday/ }).
to_return(:body => File.read(Rails.root.join("spec/data_fixtures/xkcd.html")), :status => 200)
@valid_options = {
'name' => "XKCD",
'expected_update_period_in_days' => "2",
'type' => "html",
'url' => "http://www.example.com",
'mode' => 'on_change',
'headers' => { 'foo' => 'bar' },
'extract' => {
'url' => { 'css' => "#comic img", 'value' => "@src" },
}
}
@checker = Agents::WebsiteAgent.new(:name => "ua", :options => @valid_options)
@checker.user = users(:bob)
@checker.save!
end
describe "#check" do
it "should check for changes" do
lambda { @checker.check }.should change { Event.count }.by(1)
end
end
end
end
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