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Applying BDD/TDD practices, using Jasmine.js
1.
Applying BDD and
TDD practices, using Jasmine.js - Anil Tarte © Equal Experts UK Ltd 2011 www.equalexperts.com 1
2.
Outline
Development Environment What is TDD? What is BDD? Domain problem Stories Demonstration Questions? © Equal Experts UK Ltd 2011 www.equalexperts.com 2
3.
Development Environment
Eclipse – Using Eclipse IDE for JavaScript Web Developers – Installed Jetty(Run-Jetty-Run) plugin. • Help -> Eclipse Marketplace -> type Jetty -> hit enter -> install Run-Jetty-Run Backend Server(Streamer.jar), – URL to access it “ws://localhost:8081/” – It is a Streaming Engine and a Stub Exchange © Equal Experts UK Ltd 2011 www.equalexperts.com 3
4.
Test Driven Development
(TDD)? Concept – Add a test for each new feature/improvement – Write production code, to pass test – Refactor Aspect – KISS (Keep It Simple, Stupid) – YAGNI (You Ain’t Goona Need It) – Fake it till you make it Benefits – Designs become more cleaner and clearer – Testable code – Focus only on what is important © Equal Experts UK Ltd 2011 www.equalexperts.com 4
5.
Behaviour Driven Development
(BDD)? Concept – Write/Automate a desired behaviour first (in natural language) – Driven by business value Aspect – Test method names should be sentence – It extends TDD Benefits – Clear understanding of desired software behaviour – Starting point – Encourages more collaboration, Dev + QA + BA + Customer © Equal Experts UK Ltd 2011 www.equalexperts.com 5
6.
Domain Problem
Heat Map © Equal Experts UK Ltd 2011 www.equalexperts.com 6
7.
Top 4 gainer? ©
Equal Experts UK Ltd 2011 www.equalexperts.com 7
8.
Different representation -
Heat Map © Equal Experts UK Ltd 2011 www.equalexperts.com 8
9.
Another version © Equal
Experts UK Ltd 2011 www.equalexperts.com 9
10.
Stories – Identify?
Story 1 – As a trader, when I load application, I want to see the instruments, so that … Story 2 – As a trader, I want to see “price change” updating in real time, so that … Story 3 – As a trader, I should able to see instruments performance visually(color coded), so that I will get overview of the market in real time © Equal Experts UK Ltd 2011 www.equalexperts.com 10
11.
Story 1
As a trader, when I load application, I want to see the instruments, so that … Scenario 1 – When a trader starts the application – Then I will see the instruments with details • Instrument Symbol • Instrument Name • Price change in percentage © Equal Experts UK Ltd 2011 www.equalexperts.com 11
12.
Design Discussion –
Story 1 Connect to – ws://localhost:8081/ Knockout bindings Application Streamer Engine HTML document © Equal Experts UK Ltd 2011 www.equalexperts.com 12
13.
Design Discussion –
Story 1 Connect to – ws://localhost:8081/ Application /Instrument Streamer Channel Engine Instrument Container { messageType:"Snapshot", Knockout message : {[ bindings { "instrumentSymbol":"PL Z11", "instrumentName":"Platinum", "instrumentChange":"-3.9“ } ]} HTML document } © Equal Experts UK Ltd 2011 www.equalexperts.com 13
14.
Story 2
As a trader, I want to see “price change” updating in real time. Scenario 1 – Given I have launched Heat Map application – When I monitor the Heat Map – Then I will see the instrument’s “price change” updates in real time © Equal Experts UK Ltd 2011 www.equalexperts.com 14
15.
Design Discussion –
Story 2 Connect to – ws://localhost:8081/ Application /Instrument Streamer Channel Engine Instrument Instrument Container { Knockout messageType:“Update", bindings message : {[ { "instrumentName":"Platinum", "instrumentChange":"-3.9“ } ]} HTML documents } © Equal Experts UK Ltd 2011 www.equalexperts.com 15
16.
Story 3
As a trader, I should able to see instrument’s performance visually. Scenario 1 – Given I have launched Heat Map application – When I monitor the Heat Map – Then I will see the instrument’s tile color changing according to the “price change” in real time © Equal Experts UK Ltd 2011 www.equalexperts.com 16
17.
Design Discussion –
Story 3 Connect to – ws://localhost:8081/ Color Code /Instrument Application Calculator Streamer Channel Engine Instrument Instrument Container Knockout bindings HTML documents © Equal Experts UK Ltd 2011 www.equalexperts.com 17
18.
Questions? © Equal Experts
UK Ltd 2011 www.equalexperts.com 18
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