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Copy pathhash_map.test.ts
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109 lines (85 loc) · 2.29 KB
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import { HashMap } from '../../map/hash_map'
describe('Hash Map', () => {
let hashMap: HashMap<string, number>
beforeEach(() => {
hashMap = new HashMap()
})
it('should set a value', () => {
hashMap.set('a', 1)
expect(hashMap.values()).toEqual([1])
})
it('should override a value', () => {
hashMap.set('a', 1)
hashMap.set('a', 2)
expect(hashMap.values()).toEqual([2])
})
it('should get a value', () => {
hashMap.set('a', 1)
expect(hashMap.get('a')).toBe(1)
})
it('should get null if key does not exist', () => {
expect(hashMap.get('a')).toBeNull()
})
it('should delete a value', () => {
hashMap.set('a', 1)
hashMap.delete('a')
expect(hashMap.get('a')).toBeNull()
})
it('should do nothing on delete if key does not exist', () => {
hashMap.delete('a')
expect(hashMap.get('a')).toBeNull()
})
it('should return true if key exists', () => {
hashMap.set('a', 1)
expect(hashMap.has('a')).toBe(true)
})
it('should return false if key does not exist', () => {
expect(hashMap.has('a')).toBe(false)
})
it('should clear the hash table', () => {
hashMap.set('a', 1)
hashMap.set('b', 2)
hashMap.set('c', 3)
hashMap.clear()
expect(hashMap.getSize()).toBe(0)
})
it('should return all keys', () => {
hashMap.set('a', 1)
hashMap.set('b', 2)
hashMap.set('c', 3)
expect(hashMap.keys()).toEqual(['a', 'b', 'c'])
})
it('should return all values', () => {
hashMap.set('a', 1)
hashMap.set('b', 2)
hashMap.set('c', 3)
expect(hashMap.values()).toEqual([1, 2, 3])
})
it('should return all key-value pairs', () => {
hashMap.set('a', 1)
hashMap.set('b', 2)
hashMap.set('c', 3)
expect(hashMap.entries()).toEqual([
{ key: 'a', value: 1 },
{ key: 'b', value: 2 },
{ key: 'c', value: 3 }
])
})
it('should keep entries when trigger resize', () => {
hashMap.set('a', 1)
hashMap.set('b', 2)
hashMap.set('c', 3)
hashMap.set('d', 4)
hashMap.set('e', 5)
hashMap.set('f', 6)
hashMap.set('g', 7)
hashMap.set('h', 8)
hashMap.set('i', 9)
hashMap.set('j', 10)
hashMap.set('k', 11)
hashMap.set('l', 12)
hashMap.set('m', 13)
hashMap.set('n', 14)
expect(hashMap.getSize()).toBe(14)
})
})