Unit testing JS = SQLSat 324
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Unit testing JavaScript - August 2, 2014 - SQL Sat 324
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Unit testing JS = SQLSat 324
- 1. JavaScript Testing— Technically not a number… Justin Obney, Front-End Dev
- 2. Gone are the days of old
- 3. Any application that can be written in JavaScript, will be written in JavaScript -- Atwood’s Law JS is everywhere
- 4. That no one thinks they need to actually learn how it works. Looks like C or Java… How hard could it be? JavaScript is so approachable
- 5. • The old way • Frameworks • The lies • Where to start • Tooling • Who knows? The Agenda
- 6. “Whenever you are tempted to type something into a print statement or a debugger expression, write it as a test instead.” —Martin Fowler When do I write a test?
- 8. •A unit test is code that executes part of your production code with an expectation on the result. •Unit vs. Integration •Mocking & Stubbing •Vocabulary
- 9. But testing is hard…
- 10. But the DOM
- 11. Tooling TEST’EM
- 12. I see you are on a Mac… But what about Windows?
- 13. But does it scale?
- 14. In closing
Hinweis der Redaktion
- Who am I Envoc .Net beginning now they pay me to write JavaScript The web is changing rapidly The good old days WEB FORMS: post a form let the server build 1/2 MB or html and then send it back to the client to change a radio button … Cue magic
- Some of you may still live there... Get out now… JavaScript on rise
- Atwood’s Law CodingHorror StackOverflow it runs everywhere The server Mobile apps TVs? PS4? Heard of the web.. it is here to stay.
- 0.1 + 0.2
- console.log has the nasty risk of introducing bugs all on its own. enter dev tools (`debugger;`)
- QUnit older, more support mocha can drop in any* assertion library jasmine headless browser support built in spies & mocks
- Vocabulary A unit test is code that executes part of your production code with an expectation on the result. Unit vs integration unit - should be able to trust they should all be green integration - sometimes fail due to circumstance/environment Mocking and stubbing Mocks - you expect to assert against value (1 per test) Stubs - fake calls out. can have many
- ----- Meeting Notes (4/8/14 20:43) ----- Gmail, Facebook, Twitter, Azure Management Portal Models, Controllers, Services, Smart Caching, DI -- All things that can live in the client now
- ----- Meeting Notes (4/8/14 20:48) ----- Most of the tooling you will find will run on NodeJS Node has made Windows a first class citizen. You can integrate it into most of your existing CI servers. The only thing stopping you is you.
- This is not library code. There is very little DOM manipulation going on here (SPA). This is application logic.