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co-IT.eu GmbH We Empower Outstanding Business Solutions www.co-IT.eu Kentan – A Modular Test Data Composer @GregOnNet

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@GregOnNet CTO Gregor Woiwode

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github.com/kentan-official/kentan/

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Why? The task synthesizing test data is underestimated.

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Arrange Act Assert Theoretically … EVOLUTION OF UNIT TESTS

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Arrange Act Assert Mostly we see… EVOLUTION OF UNIT TESTS

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Arrange Act Assert Things can get even more complicated EVOLUTION OF UNIT TESTS

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The share for Arrangement and Act grows

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https://kentan-official.github.io/kentan/

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The flow of Kentan ARCHITECTURE Setup Model Configure Test Sketch Compose Override

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Support for Testing Frameworks KENTAN All that use

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Setup Sketch export interface Product { id: number; title: string; description: string; priceInDollars: number; }

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Sketch import { Sketch } from '@kentan-official/core'; import { Product } from '@models/product'; export class ForProduct extends Sketch { constructor() { super({ id: 1, title: 'XBox One‘, description: 'Gaming Console‘, priceInDollars: 300 }); } }

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Sketch import { Sketch } from '@kentan-official/core'; import { Product } from '@models/product'; export class ForProduct extends Sketch { constructor() { super({ id: 1, title: 'XBox One‘, description: 'Gaming Console‘, priceInDollars: 300 }); } }

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Sketch import { Sketch } from '@kentan-official/core'; import { Product } from '@models/product'; export class ForProduct extends Sketch { constructor() { super({ id: 1, title: 'XBox One‘, description: 'Gaming Console‘, priceInDollars: 300 }); } }

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Sketch import { Sketch } from '@kentan-official/core'; import { Product } from '@models/product'; export class ForProduct extends Sketch { constructor() { super({ id: 1, title: 'XBox One', description: 'Gaming Console', priceInDollars: 300 }); } }

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Configure SKETCH describe('Product', () => { describe('When a price is given', () => { it('should yield the actual price', () => { const givenPrice = 300; const product = Kentan.sketch(ForProduct).model(); expect(product.priceInDollars).toBe(givenPrice); }); }); });

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Configure SKETCH describe('Product', () => { describe('When a price is given', () => { it('should yield the actual price', () => { const givenPrice = 300; const product = Kentan.sketch(ForProduct).model(); expect(product.priceInDollars).toBe(givenPrice); }); }); });

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Configure SKETCH describe('Product', () => { describe('When a price is given', () => { it('should yield the actual price', () => { const givenPrice = 300; const product = Kentan.sketch(ForProduct).model(); expect(product.priceInDollars).toBe(givenPrice); }); }); });

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Configure SKETCH describe('Product', () => { describe('When a price is given', () => { it('should yield the actual price', () => { const givenPrice = 300; const product = Kentan.sketch(ForProduct).model(); expect(product.priceInDollars).toBe(givenPrice); }); }); });

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Configure SKETCH Kentan.sketch(ForShoppingBasket).model({ title: 'Play Station' }); Kentan provides bulk overrides.

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Configure SKETCH Kentan.sketch(ForShoppingBasket) .take(10) .models({ title: index => `Game Console ${index}` }); Kentan creates lists

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Configure SKETCH Kentan.sketch(ForShoppingBasket) .take(10) .models({ title: index => `Game Console ${index}` }); Bulk overrides for lists

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npm install @kentan-official/core Kentan is hosted at

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Demo https://github.com/kentan-official/quick-start

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Kentan has built-in support for cypress.io

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Demo https://github.com/kentan-official/cypress-playground

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The Downside Of Kentan KENTAN More Files Boilerplate Code

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If you detect a weakness turn it into a strength.

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ng add @kentan-official/schematics Add Kentan to https://kentan-official.github.io/kentan/docs/#/angular-cli/schematics

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Demo https://github.com/kentan-official/angular-playground

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Summary KENTAN Sketch creates reusable test data Generator builds configurable Sketch-Lists Helpers configure Sketches Tooling for Angular generating Sketchs automatically

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co-IT.eu GmbH We Empower Outstanding Business Solutions www.co-IT.eu Thank You @GregOnNet