Applications First, Frameworks Second

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Applications First,! Frameworks Second Railsconf 2014 Workshop by @adman65 https://github.com/ahawkins/applications-ﬁrst-frameworks-second https://github.com/ahawkins/chassis

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Agree with DHH?

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This may be the wrong place

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I may be an! Architecture ! Astronaut

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No content

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We’re Making a Blog!

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Patterns

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Tests

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Service Objects

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Form Objects

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Repository

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Chassis

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ActiveRecord

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ActionPack

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Step 1: pulls/1 • Make “bundle exec rake” run tests • Create a failing test to ensure things work correctly • git checkout feature/step-1 ; git checkout HEAD~2

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Step 2: pulls/2 • git checkout -b feature/step-1; git checkout -b my-step-2 • Create a failing acceptance/integration/system test • This test should create a “Post” with a “title” & “text” attributes • Test that this object is persisted some how • PublishPost — Service Object — instantiated with the form • PublishPostForm — models input — instantiated with a Hash • PostRepo — manages the Posts

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Step 3: pulls/3 • git checkout -b feature/step-2 • Write a unit test for the “Post” class • Test it can be initialized with a Hash • ruby test/post_test.rb

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Step 4: pulls/4 • git checkout -b feature/step-3 • Deﬁne “PublishPostForm” • Hint: use Chassis.form (see chassis readme) • Hint: nothing to test yet

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Step 5: pulls/5 • git checkout feature/step-4 • Create “PostRepo” • Use Chassis::Repo::Delegation • Refer to chassis README for an example • No tests needed for this one

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Step 6: pulls/6 • Introduce a stub “PublishPost” service object • It should implement the interface in the acceptance tests • Don’t add functionality

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Step 7: pulls/7 • Write that implementation • Hint: include Chassis::Persistence in Post

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Step 8: pulls/8 • Add another test case to the acceptance test that does not include a “text”/“title” • Make it pass! • Hint: add validation to the form • Chassis.repo.clear

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Step 9: pulls/9 • Add Rails, • I’ll do this • Let’s talk about it

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Step 10: pulls/10 • Time to think in HTML • Use capybara to create failing tests and submits a form and then displays the post