Cucumber: It's about Talking not Testing

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Cucumber It’s about talking not testing Chris Parsons (@chrismdp) Friday, 29 June 12

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GardenApp 1.0 Friday, 29 June 12

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Kick off meeting Friday, 29 June 12

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Feature: User orders plant As a user of the website, I want to place an order on the website, so that I can order a plant through the website Scenario: User orders plant Given there is a plant with name: “Plant 1”, price: “£1”, size: “large”, foliage: “foliage 1” When I visit the homepage And I click on “Plant 1” And I click “Add” Friday, 29 June 12

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And I fill in “City” with “City 1” And I fill in “Postcode” with “SW1A 1AA” And I click “Continue” And I click “Continue” And I fill in “Card number” with “1234 1234 1234 1234” And I fill in “Expiry date” with “00/00” And I fill in “Name on Card” with “Name on Card 1” And I fill in “CV2” with “123” And I click “Place Order” Then I should receive an email Friday, 29 June 12

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What is Cucumber? Friday, 29 June 12

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$ mkdir features $ vim features/ first.feature $ cucumber Friday, 29 June 12

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Myth #1: Cucumber was made for us. Friday, 29 June 12

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Listening Friday, 29 June 12

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“So, I’m thinking of a gardening website, where you can buy stuff...” Friday, 29 June 12

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“...but with a way for those who love gardening to make it a whole interactive experience, right?” Friday, 29 June 12

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“So gardeners can create like an ‘area’ to put pictures of their plants...” Friday, 29 June 12

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“...and other gardeners can say what they think, and suggest garden layout improvements...” Friday, 29 June 12

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“Herp derpety derp derp herp herpity derp website derp herp derp buy stuff” Friday, 29 June 12

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“...derpety herpity derpety herpity users derp herp social derp?” Friday, 29 June 12

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“Users herp derp account derpety users#show derp photos (hmm, EC2 storage; which gem? Add day to estimate)” Friday, 29 June 12

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“...herp herpity herp derp ratings derpity comments” Friday, 29 June 12

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Myth #2: Cucumber features capture everything. Friday, 29 June 12

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What is a feature? Friday, 29 June 12

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The feature is not the feature. Friday, 29 June 12

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Reminder of communication Friday, 29 June 12

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Record of communication Friday, 29 June 12

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Reek Detector for communication Friday, 29 June 12

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Myth #3: Cucumber is a testing tool. Friday, 29 June 12

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“Why?” not “How?” Friday, 29 June 12

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Given /there (?:is|are) (a|\d+) (\w+) with ((\w+): (\w+) )+$/ do |count, name, fields| count = count == “a” ? 1 : count.to_i params = {} fields.each do |field| params[field[0]] = field[1] end count.times { name.classify.create! (params) } end Friday, 29 June 12

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....FF...FFFUUU Friday, 29 June 12

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GardenApp 2.0 Friday, 29 June 12

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Ubiquitous Language Friday, 29 June 12

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“So, I’m thinking of a gardening website, where you can buy stuff...” Friday, 29 June 12

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“...but with a way for those who love gardening to make it a whole interactive experience, right?” Friday, 29 June 12

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“So gardeners can create like an ‘area’ to put pictures of their plants...” Friday, 29 June 12

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“...and other gardeners can say what they think, and suggest garden layout improvements...” Friday, 29 June 12

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Feature: User orders plant As Gareth the aspiring gardener, I want to buy plants I’ve seen shared on other gardeners uploaded layouts, so that I can improve my own garden with ideas from others Friday, 29 June 12

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Scenario: Gareth buys plants When “Gareth” buys a recommended plant Then the order should be placed Friday, 29 June 12

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Scenario: Gareth supplies incorrect information When “Gareth” enters incorrect information during a purchase Then he is shown an appropriate error And the order does not get placed Friday, 29 June 12

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When /^“(.+)” buys a recommended plant$/ do |name| place_order(user_for(name)) end Then /^the order should be placed$/ do |name| check_order_placed(user_for(name)) end Friday, 29 June 12

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When /^“(.+)” enters incorrect information during a purchase$/ do |name| place_order(user_for(name)) do fill_in :credit_card, :with => “bad” end end Friday, 29 June 12

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def user_for(name) User.find_by_name(name) || User.create(:name => name) end def place_order(user) visit order_path fill_in :name, :with => user.name yield if block_given? click_button “Submit” end Friday, 29 June 12