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const { exec } = require('child_process'); | ||
const { existsSync } = require('fs'); | ||
const { join } = require('path'); | ||
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const date = new Date(); | ||
const year = date.getFullYear(); | ||
const month = String(date.getMonth() + 1).padStart(2, '0'); | ||
const day = String(date.getDate()).padStart(2, '0'); | ||
const testPath = `./tasks/${year}-${month}-${day}/index.test.ts`; | ||
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const fullTestPath = join(process.cwd(), testPath); | ||
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if (existsSync(fullTestPath)) { | ||
exec(`jest --colors ${testPath}`, (error, stdout, stderr) => { | ||
if (error) { | ||
console.error(`exec error: ${error}`); | ||
return; | ||
} | ||
console.log(`stdout: ${stdout}`); | ||
console.error(`stderr: ${stderr}`); | ||
}); | ||
} else { | ||
console.log(`Nie znaleziono folderu z dzisiejszą datą: ${testPath}. Uruchamiam wszystkie testy.`); | ||
exec('jest --colors', (error, stdout, stderr) => { | ||
if (error) { | ||
console.error(`exec error: ${error}`); | ||
return; | ||
} | ||
console.log(`stdout: ${stdout}`); | ||
console.error(`stderr: ${stderr}`); | ||
}); | ||
} |
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import { GiftRegistry } from './index'; | ||
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describe('GiftRegistry', () => { | ||
it('should retrieve all gifts for a given child ID', () => { | ||
const registry = new GiftRegistry(); | ||
registry.addGift(1, 'teddy bear'); | ||
registry.addGift(1, 'bicycle'); | ||
registry.addGift(2, 'car model'); | ||
expect(registry.getGiftsForChild(1)).toEqual(['teddy bear', 'bicycle']); | ||
}); | ||
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it('should handle removal of gifts correctly', () => { | ||
const registry = new GiftRegistry(); | ||
registry.addGift(1, 'teddy bear'); | ||
registry.addGift(1, 'bicycle'); | ||
registry.removeGift(1, 'teddy bear'); | ||
expect(registry.getGiftsForChild(1)).toEqual(['bicycle']); | ||
expect(registry.getGiftsForChild(1)).not.toContain('teddy bear'); | ||
}); | ||
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it('should throw an error if trying to remove a gift that does not exist', () => { | ||
const registry = new GiftRegistry(); | ||
registry.addGift(1, 'teddy bear'); | ||
expect(() => registry.removeGift(1, 'puzzle')).toThrow('Gift not found'); | ||
}); | ||
}); |
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export class GiftRegistry { | ||
private registry: Record<number, string[]> = {}; | ||
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addGift(childId: number, gift: string) { | ||
if (!this.registry[childId]) { | ||
this.registry[childId] = []; | ||
} | ||
this.registry[childId].push(gift); | ||
} | ||
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getGiftsForChild(childId: number): string[] { | ||
return this.registry[childId] || []; | ||
} | ||
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removeGift(childId: number, gift: string) { | ||
const gifts = this.registry[childId]; | ||
if (!gifts || !gifts.includes(gift)) { | ||
throw new Error('Gift not found!'); | ||
} | ||
this.registry[childId] = gifts.filter(item => item !== gift); | ||
} | ||
} |
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import { ChristmasQueue } from './index'; | ||
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describe('ChristmasQueue', () => { | ||
test('should enqueue and dequeue items based on priority', () => { | ||
const pq = new ChristmasQueue<string>(); | ||
pq.enqueue('lowPriority', 1); | ||
pq.enqueue('highPriority', 3); | ||
pq.enqueue('mediumPriority', 2); | ||
pq.enqueue('highPriority', 3); | ||
pq.enqueue('lowPriority', 1); | ||
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expect(pq.dequeue()).toBe('highPriority'); | ||
expect(pq.dequeue()).toBe('highPriority'); | ||
expect(pq.dequeue()).toBe('mediumPriority'); | ||
expect(pq.dequeue()).toBe('lowPriority'); | ||
expect(pq.dequeue()).toBe('lowPriority'); | ||
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expect(pq.isEmpty()).toBe(true); | ||
}); | ||
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test('should handle same priority items in FIFO order', () => { | ||
const pq = new ChristmasQueue<string>(); | ||
pq.enqueue('firstIn', 2); | ||
pq.enqueue('secondIn', 2); | ||
pq.enqueue('thirdIn', 2); | ||
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expect(pq.dequeue()).toBe('firstIn'); | ||
expect(pq.dequeue()).toBe('secondIn'); | ||
expect(pq.dequeue()).toBe('thirdIn'); | ||
}); | ||
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test('should support complex types', () => { | ||
const pq = new ChristmasQueue<{ giftName: string }>(); | ||
pq.enqueue({ giftName: 'game console' }, 1); | ||
pq.enqueue({ giftName: 'snowboard' }, 2); | ||
pq.enqueue({ giftName: 'christmas balls' }, 3); | ||
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expect(pq.dequeue()).toStrictEqual({ giftName: 'christmas balls' }); | ||
expect(pq.dequeue()).toStrictEqual({ giftName: 'snowboard' }); | ||
expect(pq.dequeue()).toStrictEqual({ giftName: 'game console' }); | ||
}); | ||
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test('should throw an error when dequeueing from an empty queue', () => { | ||
const pq = new ChristmasQueue<string>(); | ||
expect(pq.isEmpty()).toBe(true); | ||
expect(() => pq.dequeue()).toThrow('There are no letters in the queue!'); | ||
}); | ||
}); |
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export class ChristmasQueue<T> { | ||
private queue: { item: T; priority: number }[] = []; | ||
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enqueue(item: T, priority: number): void { | ||
let added = false; | ||
for (let i = 0; i < this.queue.length; i++) { | ||
if (priority > this.queue[i].priority) { | ||
this.queue.splice(i, 0, { item, priority }); | ||
added = true; | ||
break; | ||
} | ||
} | ||
if (!added) { | ||
this.queue.push({ item, priority }); | ||
} | ||
} | ||
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dequeue(): T { | ||
if (this.isEmpty()) { | ||
throw new Error('There are no letters in the queue!'); | ||
} | ||
return this.queue.shift()!.item; | ||
} | ||
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isEmpty(): boolean { | ||
return this.queue.length === 0; | ||
} | ||
} |
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import { Lokalizacja, MapaCzasoprzestrzenna, znajdzWorek } from './index'; | ||
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describe('znajdzWorek', () => { | ||
test('powinien zwrócić lokalizację z najwyższą wartością mapy', () => { | ||
const lokalizacje: Lokalizacja[] = [ | ||
{ x: 1, y: 2, z: 3, czas: 4 }, | ||
{ x: 5, y: 6, z: 7, czas: 8 }, | ||
{ x: 9, y: 10, z: 11, czas: 12 }, | ||
]; | ||
const mapa: MapaCzasoprzestrzenna = (x, y, z, czas) => x + y + z + czas; | ||
const wynik = znajdzWorek(lokalizacje, mapa); | ||
expect(wynik).toEqual({ x: 9, y: 10, z: 11, czas: 12 }); | ||
}); | ||
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test('powinien zwrócić null, gdy lista lokalizacji jest pusta', () => { | ||
const lokalizacje: Lokalizacja[] = []; | ||
const mapa: MapaCzasoprzestrzenna = jest.fn(); | ||
const wynik = znajdzWorek(lokalizacje, mapa); | ||
expect(wynik).toBeNull(); | ||
}); | ||
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test('powinien obsłużyć wartości niepoprawne matematycznie', () => { | ||
const lokalizacje: Lokalizacja[] = [ | ||
{ x: -1, y: -2, z: -3, czas: -4 }, | ||
{ x: 0, y: 0, z: 0, czas: 0 }, | ||
]; | ||
const mapa: MapaCzasoprzestrzenna = () => NaN; | ||
const wynik = znajdzWorek(lokalizacje, mapa); | ||
expect(wynik).toBeNull(); | ||
}); | ||
}); |
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export interface Lokalizacja { | ||
x: number; | ||
y: number; | ||
z: number; | ||
czas: number; | ||
} | ||
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export type MapaCzasoprzestrzenna = (x: number, y: number, z: number, czas: number) => number; | ||
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export function znajdzWorek(lokalizacje: Lokalizacja[], mapa: MapaCzasoprzestrzenna): Lokalizacja | null { | ||
if (lokalizacje.length === 0) { | ||
return null; | ||
} | ||
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let maxWartosc = -Infinity; | ||
let najlepszaLokalizacja: Lokalizacja | null = null; | ||
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for (const lokalizacja of lokalizacje) { | ||
const { x, y, z, czas } = lokalizacja; | ||
const wartoscMapy = mapa(x, y, z, czas); | ||
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if (!isNaN(wartoscMapy) && isFinite(wartoscMapy) && wartoscMapy > maxWartosc) { | ||
maxWartosc = wartoscMapy; | ||
najlepszaLokalizacja = lokalizacja | ||
} | ||
} | ||
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return najlepszaLokalizacja; | ||
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} |
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import { memoize } from './index'; | ||
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describe('memoize', () => { | ||
it('should memoize function results', () => { | ||
const complexCalculation = jest.fn().mockImplementation((x: number) => x * x); | ||
const memoizedCalculation = memoize(complexCalculation); | ||
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expect(memoizedCalculation(2)).toBe(4); | ||
expect(memoizedCalculation(2)).toBe(4); | ||
expect(memoizedCalculation(3)).toBe(9); | ||
expect(complexCalculation).toHaveBeenCalledTimes(2); | ||
}); | ||
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it('should handle different arguments correctly', () => { | ||
const greeting = jest.fn().mockImplementation((p: string) => `${p}!`); | ||
const memoizedGreeting = memoize(greeting); | ||
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expect(memoizedGreeting('John')).toBe('John!'); | ||
expect(memoizedGreeting('Paul')).toBe('Paul!'); | ||
expect(greeting).toHaveBeenCalledTimes(2); | ||
}); | ||
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it('should throw an error when non-function is memoized', () => { | ||
expect(() => memoize(42 as never)).toThrow('Function to be memoized must be a function.'); | ||
}); | ||
}); |
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type MemoizedFunction<T> = (...args: any[]) => T; | ||
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export function memoize<T>(func: (...args: any[]) => T): MemoizedFunction<T> { | ||
if (typeof func !== 'function') { | ||
throw new Error('Function to be memoized must be a function.'); | ||
} | ||
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const cache = new Map<string, T>(); | ||
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return (...args: any[]): T => { | ||
const key = JSON.stringify(args); | ||
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if (cache.has(key)) { | ||
return cache.get(key)!; | ||
} | ||
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const result = func(...args); | ||
cache.set(key, result); | ||
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return result; | ||
}; | ||
} |
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// Tutaj skopiuj testy dla zadania. Uruchom je poleceniem `npm test` | ||
import { ChristmasEmitter } from './index'; | ||
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describe('ChristmasEmitter', () => { | ||
it('should allow to subscribe and emit events', () => { | ||
const emitter = new ChristmasEmitter(); | ||
const letterCallback = jest.fn(); | ||
const giftCallback = jest.fn(); | ||
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emitter.on('letter', letterCallback); | ||
emitter.on('gift', giftCallback); | ||
emitter.emit('letter'); | ||
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expect(letterCallback).toHaveBeenCalled(); | ||
expect(giftCallback).not.toHaveBeenCalled(); | ||
}); | ||
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it('should handle multiple subscribers for the same event', () => { | ||
const emitter = new ChristmasEmitter(); | ||
const firstMockCallback = jest.fn(); | ||
const secondMockCallback = jest.fn(); | ||
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emitter.on('gift', firstMockCallback); | ||
emitter.on('gift', secondMockCallback); | ||
emitter.emit('gift'); | ||
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expect(firstMockCallback).toHaveBeenCalled(); | ||
expect(secondMockCallback).toHaveBeenCalled(); | ||
}); | ||
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it('should not call callbacks after they have been removed', () => { | ||
const emitter = new ChristmasEmitter(); | ||
const mockCallback = jest.fn(); | ||
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emitter.on('letter', mockCallback); | ||
emitter.off('letter', mockCallback); | ||
emitter.emit('letter'); | ||
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expect(mockCallback).not.toHaveBeenCalled(); | ||
}); | ||
}); |
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type Callback = () => void; | ||
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export class ChristmasEmitter { | ||
private events: Record<string, Callback[]> = {} | ||
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on(event: string, callback: Callback) { | ||
this.events[event] = this.events[event] || []; | ||
this.events[event].push(callback); | ||
} | ||
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off(event: string, callback: Callback) { | ||
if (this.events[event]) { | ||
this.events[event] = this.events[event].filter(cb => cb !== callback); | ||
} | ||
} | ||
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emit(event: string) { | ||
if (this.events[event]) { | ||
this.events[event].forEach(callback => callback()); | ||
} | ||
} | ||
} |
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