Testing Code.org's Interactive Computer Science Curriculum

bcjordan.com

brian@code.org@bcjordan

Brian Jordan, software engineer at Code.org

Code.org

non-profit

expanding participation in CS

Hour of Code

10 million

43 million

now?

district partnerships, professional development

700 teachers trained 10 school districts

policy changes

K-12 CS Curriculum

Testing Challenges

what are we up against?

demo time!

testing challenges

multiple browsers

multiple browsers

iOS / Android

IE 9

localization

33 languages

left-to-right

right-to-left

browser features

<svg>, <canvas>

Javascript

conditional logic to support all browsers

tough but important

now let's test it!

Unit Tests!

Unit Tests?blockly (JS, svg, canvas, grunt)

blockly-core (JS, svg, Closure Tools)

dashboard (Ruby on Rails)

Dashboard

Blockly CoreBlockly Apps

Rails testing

ActiveSupport::TestCase

Factory Girl

Factory Girl

SimpleCov

Blockly testing

solution tests

node-canvas for drawing

Chai for assertions

grunt-mocha-test

solution tests

solution tests

solution tests

UI tests

challenge:multiple browsers

solution:

BrowserStack

challenge:

interaction, drag-and-drop

solution:jQuery Simulate

$(selector).drag…

Cucumber —> Selenium

local tests with chromedriver

@browser = Selenium::WebDriver.for :chrome, :url=>"http://127.0.0.1:9515"

remote tests with BrowserStack

@browser = Selenium::WebDriver.for :remote, url => "http://#{browserstack_username}:#{browserstack_authkey} @hub.browserstack.com/wd/hub"

Cucumber is uncomfortable to start with

DSL should be high-level

And I drag block "2" to block "4"

Build a library of steps

Visit the URLGiven I am on "http://learn.code.org/s/1/level/24"

Visit the URLGiven /^I am on "([^"]*)"$/ do |url| url = replace_hostname(url) @browser.navigate.to "#{url}" end

Annotations

@no_mobile

@no_ie@skip

@db_access

On BrowserStack

Demo: Speed Run

Monitoring

integration with CI

HipChat all the things

completion rates

per-browser completion rates

Travis CI <> GitHub

Takeaways

Build up Library of Tests

Culture of Testing

Saves time in test writing

Saves time in development

Thanks!

bcjordan.com

brian@code.org@bcjordan

Brian Jordan, software engineer at Code.org

http://code.org/help

http://github.com/code-dot-org