113 lines
3.3 KiB
TypeScript
113 lines
3.3 KiB
TypeScript
import { describe, expect, it } from 'vitest'
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import { LruMap } from './lru-map.js'
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describe('LruMap', () => {
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it('should maintain maximum size by removing oldest added', () => {
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const lru = new LruMap<string, number>(2)
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lru.set('first', 1)
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lru.set('second', 2)
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lru.set('third', 3)
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expect(lru.has('first')).toBeFalsy()
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})
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it('should update the last added item', () => {
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const lru = new LruMap<string, number>(2)
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lru.set('first', 1)
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lru.set('second', 2)
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lru.set('first', 42)
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lru.set('third', 3)
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expect(lru.get('first')).toEqual(42)
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expect(lru.has('second')).toBeFalsy()
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})
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it('should update the last used item', () => {
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const lru = new LruMap<string, number>(2)
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lru.set('first', 1)
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lru.set('second', 2)
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lru.get('first')
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lru.set('third', 3)
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lru.get('third')
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expect(lru.get('first')).toEqual(1)
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expect(lru.has('second')).toBeFalsy()
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})
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it('should allow deleting items', () => {
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const lru = new LruMap<string, number>(2)
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lru.set('first', 1)
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lru.set('second', 2)
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lru.set('third', 3) // first is now deleted
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lru.delete('second')
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expect(lru.has('first')).toBeFalsy()
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expect(lru.has('second')).toBeFalsy()
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expect(lru.has('third')).toBeTruthy()
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})
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it('should handle deleting all items', () => {
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const lru = new LruMap<string, number>(2)
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lru.set('first', 1)
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lru.set('second', 2)
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lru.delete('second')
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lru.delete('first')
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expect(lru.has('first')).toBeFalsy()
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expect(lru.has('second')).toBeFalsy()
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})
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it('should return undefined for non-existing items', () => {
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const lru = new LruMap<string, number>(2)
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lru.set('first', 1)
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lru.set('second', 2)
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expect(lru.get('third')).toEqual(undefined)
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})
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// it('Map backend', () => {
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// const lru = new LruMap<string, number>(2)
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//
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// lru.set('first', 1)
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// expect(lru.has('first')).true
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// expect(lru.has('second')).false
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// expect(lru.get('first')).eq(1)
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//
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// lru.set('first', 42)
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// expect(lru.has('first')).true
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// expect(lru.has('second')).false
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// expect(lru.get('first')).eq(42)
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//
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// lru.set('second', 2)
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// expect(lru.has('first')).true
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// expect(lru.has('second')).true
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// expect(lru.get('first')).eq(42)
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// expect(lru.get('second')).eq(2)
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//
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// lru.set('third', 3)
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// expect(lru.has('first')).false
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// expect(lru.has('second')).true
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// expect(lru.has('third')).true
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// expect(lru.get('first')).eq(undefined)
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// expect(lru.get('second')).eq(2)
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// expect(lru.get('third')).eq(3)
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//
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// lru.get('second') // update lru so that last = third
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// lru.set('fourth', 4)
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// expect(lru.has('first')).false
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// expect(lru.has('second')).true
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// expect(lru.has('third')).false
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// expect(lru.has('fourth')).true
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// expect(lru.get('first')).eq(undefined)
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// expect(lru.get('second')).eq(2)
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// expect(lru.get('third')).eq(undefined)
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// expect(lru.get('fourth')).eq(4)
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// })
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})
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