TDD of HTTP Clients With WebMock

TDD of HTTP Clients with WebMock Bartosz Blimke @bartoszblimke new bamboo

Test TDD RED RED Code new bamboo

Hello http://my.geoservice.org Give me location for zip code WC1H 9EF GET http://my.geoservice.org/?zip=WC1H 9EF HTTP 200 - OK Content-Type: application/json Here is your location: {"latitude"=>"51.52","longitude":-0.12"} new bamboo

describe GeoCoordinatesFinder do it "should make http request to geocoding service" do end it "should report coordinates provided by geocoding service" do end end new bamboo

describe GeoCoordinatesFinder do it "should make http request to geocoding service" do ??? end it "should report coordinates provided by geocoding service" do ??? end end new bamboo

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class GeoCoordinatesFinder def get_coordinates_by_zip_code(zip) res = Net::HTTP.start("my.geoservice.org", 80) { |http| http.get("/?zip=#{URI.encode(zip)}") } result = JSON.parse(res) [result['latitude'], result['longitude']] end end new bamboo

describe GeoCoordinatesFinder do before(:each) do @coordinates_finder = GeoCoordinatesFinder.new @mock_http = mock("http") @res = mock(Net::HTTPOK, :body => "{"latitude":"5.5","longitude":"6.6"}") Net::HTTP.stub!(:start).with("my.geoservice.org", 80).and_yield @mock_http @mock_http.stub!(:get).with("/?zip=WC1H%209EF").and_return(@res) end it "should make http request to geocoding service" do Net::HTTP.should_receive(:start).and_yield @mock_http @mock_http.should_receive(:get).with("/?zip=WC1H%209EF") @coordinates_finder.get_coordinates_by_zip_code("WC1H 9EF") end it "should report coordinates provided by geocoding service" do @coordinates_finder.get_coordinates_by_zip_code("WC1H 9EF").should == ["5.5", "6.6"] end end new bamboo

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class GeoCoordinatesFinder def get_coordinates_by_zip_code(zip) url = "http://my.geoservice.org?zip=#{URI.encode(zip)}" response = RestClient.get(url) result = JSON.parse(response) [result['latitude'], result['longitude']] end end new bamboo

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describe GeoCoordinatesFinder do before(:each) do @coordinates_finder = GeoCoordinatesFinder.new RestClient.stub!(:get).with("http://my.geoservice.org?zip=WC1H%209EF"). and_return("{"latitude":"5.5","longitude":"6.6"}") end it "should make http request to yahoo geocoding service" do RestClient.should_receive(:get).with("http://my.geoservice.org?zip=WC1H%209EF") @coordinates_finder.get_coordinates_by_zip_code("WC1H 9EF") end it "should report coordinates provided by geocoding service" do @coordinates_finder.get_coordinates_by_zip_code("WC1H 9EF").should == ["5.5", "6.6"] end end new bamboo

I wanted a tool for stubbing HTTP requests that...

I wanted a tool for stubbing HTTP requests that... • doesn’t depend on usage of a speciﬁc API

I wanted a tool for stubbing HTTP requests that... • doesn’t depend on usage of a speciﬁc API • supports stubbing based on request method, uri, body and headers

I wanted a tool for stubbing HTTP requests that... • doesn’t depend on usage of a speciﬁc API • supports stubbing based on request method, uri, body and headers • veriﬁes expectations of requests

I wanted a tool for stubbing HTTP requests that... • doesn’t depend on usage of a speciﬁc API • supports stubbing based on request method, uri, body and headers • veriﬁes expectations of requests • supports different HTTP libraries

WebMock new bamboo

require 'webmock/rspec' include WebMock describe GeoCoordinatesFinder do before(:each) do @coordinates_finder = GeoCoordinatesFinder.new stub_request(:get, "http://my.geoservice.org?zip=WC1H 9EF"). to_return(:body => "{"latitude":"5.5","longitude":"6.6"}") end it "should make http request to geocoding service" do @coordinates_finder.get_coordinates_by_zip_code("WC1H 9EF") WebMock.should have_requested(:get, "http://my.geoservice.org?zip=WC1H 9EF") end it "should report coordinates provided by geocoding service" do @coordinates_finder.get_coordinates_by_zip_code("WC1H 9EF"). should == ["5.5", "6.6"] end end new bamboo

require 'webmock/rspec' include WebMock describe GeoCoordinatesFinder do before(:each) do @coordinates_finder = GeoCoordinatesFinder.new stub_request(:get, "http://my.geoservice.org?zip=WC1H 9EF"). to_return(:body => "{"latitude":"5.5","longitude":"6.6"}") end it "should make http request to geocoding service" do @coordinates_finder.get_coordinates_by_zip_code("WC1H 9EF") request(:get, "http://my.geoservice.org?zip=WC1H 9EF").should have_been_made end it "should report coordinates provided by geocoding service" do @coordinates_finder.get_coordinates_by_zip_code("WC1H 9EF"). should == ["5.5", "6.6"] end end new bamboo

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class GeoCoordinatesFinder def get_coordinates_by_zip_code(zip) uri = "http://my_geoservice.org?zip=#{URI.encode(zip)}" result = JSON.parse(HTTPClient.new.get(uri).content) [result['latitude'], result['longitude']] end end new bamboo

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Test::Unit require 'webmock/test_unit' include WebMock class TestGeoCoordinatesFinder < Test::Unit::TestCase def setup @coordinates_finder = GeoCoordinatesFinder.new stub_request(:get, "http://my.geoservice.org?zip=WC1H 9EF"). to_return(:body => "{"latitude":"5.5","longitude":"6.6"}") end def test_making_request_to_geocoding_service @coordinates_finder.get_coordinates_by_zip_code("WC1H 9EF") assert_requested :get, "http://my.geoservice.org?zip=WC1H 9EF" end def test_reporting_coordinates_provided_by_geocoding_service assert_equal @coordinates_finder.get_coordinates_by_zip_code("WC1H 9EF"), ["5.5", "6.6"] end end new bamboo

Cucumber features/common/env.rb require 'webmock' include WebMock Before do WebMock.disable_net_connect! WebMock.reset_webmock end new bamboo

Cucumber features/finding_geo_coordinates.feature Feature: Finding the way to an awesome conference In order to find the best way to Ruby Manor As a ruby geek I want to see how to get there on a map Scenario: User finds zip code coordinates on a map Given geoservice reports coordinates "51.52, -0.12" for zip code "WC1H 9EF" When I type "WC1H 9EF" into zip code field And I press "Show on map" Then I should see map centered at latitude "51.52" and longitude "-0.12" new bamboo

Cucumber features/step_definitions/geocoding_service_steps.rb Given /^geoservice reports (.+), (.+) as coordinates for zip code (.+)$/ do |lat, long, zip_code| stub_request(:get, "http://my.geoservice.org?zip=#{zip_code}"). to_return( :body => "{"latitude":"#{lat}","longitude":"#{long}"}" ) end new bamboo

Matching Requests on Body and Headers stub_request(:post, "www.example.net"). with(:body => "abc", :headers => { :content_type => 'text/plain' }) RestClient.post "www.example.net", "abc", :content_type => 'text/plain' WebMock.should have_requested(:post, "www.example.net"). with(:body => "abc", :headers => { 'Content-Type' => 'text/plain' }) new bamboo

Smart URI Matching www.example.net/my path?x=my params new bamboo

Smart URI Matching www.example.net/my path?x=my params www.example.net/my%20path?x=my%20params www.example.net:80/my path?x=my params www.example.net:80/my%20path?x=my%20params http://www.example.net/my path?x=my params http://www.example.net/my%20path?x=my%20params http://www.example.net:80/my path?x=my params http://www.example.net:80/my%20path?x=my%20params new bamboo

Matching URIs with Regexp stub_request(:post, /example/). with(:body => "abc", :headers => { :content_type => 'text/plain' }) RestClient.post "www.example.net", "abc", :content_type => 'text/plain' WebMock.should have_requested(:post, /example/). with(:body => "abc", :headers => { 'Content-Type' => 'text/plain' }) new bamboo

Basic Authentication stub_request(:any, 'user:pass@www.example.net'). to_return(:body => 'abc') RestClient::Resource.new( 'www.example.net', :user => 'user', :password => 'pass' ).post('abc') # ===> "abcn" WebMock.should have_requested(:post, 'user:pass@www.example.net') new bamboo

Dynamic Responses stub_request(:any, 'www.example.net'). to_return(:body => lambda { |request| request.body }) RestClient.post('www.example.net', 'abc') # ===> "abcn" new bamboo

Supported Libraries Net::HTTP HTTPClient new bamboo

Supported Libraries Net::HTTP HTTPClient HTTParty RESTClient RightScale::HttpConnection open-uri new bamboo

http://github.com/bblimke/webmock new bamboo

http://github.com/bblimke/webmock http://groups.google.com/group/webmock-users new bamboo

http://github.com/bblimke/webmock http://groups.google.com/group/webmock-users bartosz@new-bamboo.co.uk @bartoszblimke new bamboo

Questions? http://github.com/bblimke/webmock http://groups.google.com/group/webmock-users bartosz@new-bamboo.co.uk @bartoszblimke new bamboo

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TDD of HTTP Clients With WebMock

by Bartosz Blimke on Dec 13, 2009

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TDD of HTTP Clients With WebMock — Presentation Transcript