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Node.JS: Do you know the dependency of your dependencies dependency
- 1. @wswebcreation NODE.JS AND TESTING Knowing the dependency of your dependencies
- 4. @wswebcreation Agenda •Node.JS •History •How does it work? •Installing •NPM •Node.JS & Testing •Q&A
- 6. @wswebcreation Node.JS It’s rising • 1995 by Brendan Eich @wswebcreation
- 7. @wswebcreation Node.JS It’s rising • 1995 by Brendan Eich • Created in 10 days @wswebcreation
- 8. @wswebcreation Node.JS It’s rising • 1995 by Brendan Eich • Created in 10 days • Started as LiveScript @wswebcreation
- 9. @wswebcreation Node.JS It’s rising • 1995 by Brendan Eich • Created in 10 days • Started as LiveScript • 1996 ECMA standard @wswebcreation
- 10. @wswebcreation Node.JS It’s rising • 1995 by Brendan Eich • Created in 10 days • Started as LiveScript • 1996 ECMA standard • 2005 Ajax was created @wswebcreation
- 11. @wswebcreation Node.JS It’s rising • 1995 by Brendan Eich • Created in 10 days • Started as LiveScript • 1996 ECMA standard • 2005 Ajax was created @wswebcreation
- 12. @wswebcreation Node.JS It’s rising • 1995 by Brendan Eich • Created in 10 days • Started as LiveScript • 1996 ECMA standard • 2005 Ajax was created • 2006 jQuery @wswebcreation
- 13. @wswebcreation Node.JS - What it’s NOT? !!PROGRAMMING LANGUAGE!!
- 14. @wswebcreation Node.JS - What is it? Node is an open source cross platform runtime environment for JavaScript outside of a browser, based on Chromes V8 engine.
- 16. @wswebcreation Node.JS •Founded in 2009 •Chromes V8 engine @wswebcreation
- 17. @wswebcreation Node.JS •Founded in 2009 •Chromes V8 engine •NodeJS evolved rapidly @wswebcreation • 2010: Express • 2011: • npm 1.0 released • LinkedIn, Uber,.. adopt NodeJS • 2012-2014: lots of improvements • 2015: • Node.JS Foundation is born • ES6 support • Private modules • Yarn is born • 2016-now: 📈
- 18. @wswebcreation Node.JS •Founded in 2009 •Chromes V8 engine •NodeJS evolved rapidly •Build whatever you want •Complex Websites @wswebcreation
- 19. @wswebcreation Node.JS •Founded in 2009 •Chromes V8 engine •NodeJS evolved rapidly •Build whatever you want •Complex Websites •Build Mobile Apps @wswebcreation
- 20. @wswebcreation Node.JS •Founded in 2009 •Chromes V8 engine •NodeJS evolved rapidly •Build whatever you want •Complex Websites •Build Mobile Apps •Build desktop apps @wswebcreation
- 21. @wswebcreation Node.JS vs Java •Do NOT use Node for CPU-intensive tasks •Meant for data intensive and real time applications •Asynchronous vs synchronous
- 22. @wswebcreation How does it work?
- 23. @wswebcreation Asynchronous Handle multiple non-blocking requests on a single thread.
- 24. @wswebcreation Kitchen Table 1 Table2 Asynchronous Handle multiple non-blocking requests on a single thread.
- 25. @wswebcreation Kitchen Table 1 Table2 Request 1 Request 2 Single thread Asynchronous Handle multiple non-blocking requests on a single thread.
- 26. @wswebcreation Kitchen Table 1 Table2 Synchronous Handle one blocking request on a single thread.
- 27. @wswebcreation Promises A promise is an object which can be returned synchronously from an asynchronous function. It will be in one of 3 possible states: •Pending •Fulfilled •Rejected @wswebcreation
- 30. @wswebcreation (A)synchronous •Synchronous (Java) code •Native promises •Multiple promises
- 31. @wswebcreation (A)synchronous •Synchronous (Java) code •Native promises •Multiple promises •Async await
- 32. @wswebcreation Releases •Odd released in October • Short lived • Not production ready Source: https://developer.okta.com/blog/2019/12/04/whats-new-nodejs-2020
- 33. @wswebcreation Releases •Odd released in October • Short lived • Not production ready •Even released in April • Odd stop receiving updates • Developed for 6 months (RC) Source: https://developer.okta.com/blog/2019/12/04/whats-new-nodejs-2020
- 34. @wswebcreation Releases •Odd released in October • Short lived • Not production ready •Even released in April • Odd stop receiving updates • Developed for 6 months (RC) •LTS • Production ready • bug/security fixes Source: https://developer.okta.com/blog/2019/12/04/whats-new-nodejs-2020
- 35. @wswebcreation Releases •Odd released in October • Short lived • Not production ready •Even released in April • Odd stop receiving updates • Developed for 6 months (RC) •LTS • Production ready • bug/security fixes Source: https://developer.okta.com/blog/2019/12/04/whats-new-nodejs-2020
- 42. @wswebcreation ECMA20##/ ES#(###) •ECMAScript is the standard •ES is short for ECMAScript •As of 2015 ES{year} is used @wswebcreation
- 43. @wswebcreation Babel is a JavaScript compiler. Use next generation JavaScript, today.
- 44. @wswebcreation Installing •Download it though https://nodejs.org •Through the command line: •For Mac use Homebrew •For Ubuntu use apt-get
- 45. @wswebcreation Up/Downgrading •Download it though https://nodejs.org •Through the command line: •With an NPM package called {n} •For Mac use Homebrew •For Ubuntu use apt-get
- 46. @wswebcreation Node Version Manager Command line tool to •Download •Upgrade •Downgrade With a single command @wswebcreation
- 47. @wswebcreation NPM Node Package Manager: •The website @wswebcreation
- 48. @wswebcreation NPM Node Package Manager: •The website •A Command Line Interface @wswebcreation
- 49. @wswebcreation NPM Node Package Manager: •The website •A Command Line Interface •A registry where all package are stored @wswebcreation
- 50. @wswebcreation Package A package is a project/ collection of 1 or multiple {node_modules} which have a specific task as described in the {package.json}-file.
- 51. @wswebcreation (Dis)Advantages Advantages •Share versioned code with the OS-community •Use locally and globally •Easy to download standalone tools Disadvantages •There are already 1.000.000+ packages •Projects can blow up in local space size •Versioning is not properly used by every maintainer
- 52. @wswebcreation There’s a package for that {is-odd} @wswebcreation
- 53. @wswebcreation There’s a package for that {is-odd} @wswebcreation
- 54. @wswebcreation Project size Starting an Angular project 500+MB ¯_(ツ)_/¯ @wswebcreation
- 55. @wswebcreation npx A npm package runner to run a package without installing
- 56. @wswebcreation SemVer Semantic Versioning (X.Y.Z) • MAJOR(X): incompatible API changes • MINOR(Y): add functionality in a backwards compatible manner (^) • PATCH(Z): backwards compatible bug fixes (~)
- 57. @wswebcreation SemVer Semantic Versioning (X.Y.Z) • MAJOR(X): incompatible API changes • MINOR(Y): add functionality in a backwards compatible manner (^) • PATCH(Z): backwards compatible bug fixes (~) @wswebcreationSource: http://www.wswebcreation.nl/share-your-it-mnemonic/
- 58. @wswebcreation package-lock.json •Automatically generated when npm modifies the {node_modules} tree, or {package.json} •Describes the exact tree, including versions of the latest working installation •Optimizes the installation process of the packages for a new project @wswebcreation
- 59. @wswebcreation Yarn Yarn build by Facebook in 2015 to address: • Consistency • Security • Speed @wswebcreation
- 60. @wswebcreation Node.JS & Testing •Node.JS based UI-automation frameworks
- 61. @wswebcreation Node.JS & Testing •Node.JS based UI-automation frameworks •Node.JS uses Chromes V8
- 62. @wswebcreation Node.JS & Testing •Node.JS based UI-automation frameworks •Node.JS uses Chromes V8
- 63. @wswebcreation Node.JS & Testing •Node.JS based UI-automation frameworks •Node.JS uses Chromes V8 •API-testing with SuperTest