Added test suite
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109
tests/cache.spec.ts
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109
tests/cache.spec.ts
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import {Cache} from '../src';
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describe('Cache', () => {
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type TestItem = { id: string; value: string; };
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let cache: Cache<string, TestItem>;
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let storageMock: Storage;
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let storageGetItemSpy: jest.SpyInstance;
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let storageSetItemSpy: jest.SpyInstance;
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beforeEach(() => {
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storageMock = {
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getItem: jest.fn(),
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setItem: jest.fn(),
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removeItem: jest.fn(),
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clear: jest.fn(),
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key: jest.fn(),
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length: 0,
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};
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storageGetItemSpy = jest.spyOn(storageMock, 'getItem');
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storageSetItemSpy = jest.spyOn(storageMock, 'setItem');
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cache = new Cache<string, TestItem>('id', {storage: storageMock, storageKey: 'cache'});
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jest.clearAllMocks();
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jest.useFakeTimers();
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});
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test('should add and get an item', () => {
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const item = {id: '1', value: 'a'};
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cache.add(item);
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expect(cache.get('1')).toEqual(item);
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});
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test('should not get an expired item when expired option not set', () => {
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const item = {id: '1', value: 'a'};
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cache.set('1', item);
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cache.options.expiryPolicy = 'keep';
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cache.expire('1');
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expect(cache.get('1')).toBeNull();
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expect(cache.get('1', true)).toEqual({...item, _expired: true});
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});
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test('should set and get via property access (proxy)', () => {
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(cache as any)['2'] = {id: '2', value: 'b'};
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expect((cache as any)['2']).toEqual({id: '2', value: 'b'});
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});
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test('should remove an item', () => {
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cache.set('1', {id: '1', value: 'a'});
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cache.delete('1');
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expect(cache.get('1')).toBeNull();
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expect(storageSetItemSpy).toHaveBeenCalled();
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});
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test('should clear the cache', () => {
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cache.add({id: '1', value: 'a'});
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cache.clear();
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expect(cache.get('1')).toBeNull();
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expect(cache.complete).toBe(false);
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});
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test('should add multiple items and mark complete', () => {
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const rows = [
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{id: 'a', value: '1'},
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{id: 'b', value: '2'},
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];
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cache.addAll(rows);
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expect(cache.all().length).toBe(2);
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expect(cache.complete).toBe(true);
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});
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test('should return all, keys, entries, and map', () => {
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cache.add({id: '1', value: 'a'});
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cache.add({id: '2', value: 'b'});
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expect(cache.all().length).toBe(2);
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expect(cache.keys().sort()).toEqual(['1', '2']);
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expect(cache.entries().length).toBe(2);
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expect(Object.keys(cache.map())).toContain('1');
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expect(Object.keys(cache.map())).toContain('2');
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});
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// test('should expire/delete items after TTL', () => {
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// jest.useFakeTimers();
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// cache = new Cache<string, TestItem>('id', {ttl: 0.1});
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// cache.add({id: '3', value: 'x'});
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// jest.advanceTimersByTime(250);
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// expect(cache.get('3')).toBeNull();
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// });
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test('should persist and restore from storage', () => {
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(storageMock.getItem as jest.Mock).mockReturnValueOnce(JSON.stringify({a: {id: 'a', value: 'from-storage'}}));
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const c = new Cache<string, TestItem>('id', {storage: storageMock, storageKey: 'cache'});
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expect(c.get('a')).toEqual({id: 'a', value: 'from-storage'});
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});
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test('should handle expiryPolicy "delete"', () => {
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cache.options.expiryPolicy = 'delete';
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cache.add({id: 'k1', value: 'KeepMe'});
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cache.expire('k1');
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expect(cache.get('k1', true)).toBeNull();
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});
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test('should handle expiryPolicy "keep"', () => {
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cache.options.expiryPolicy = 'keep';
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cache.add({id: 'k1', value: 'KeepMe'});
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cache.expire('k1');
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expect(cache.get('k1')).toBeNull();
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expect(cache.get('k1', true)?._expired).toBe(true);
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});
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});
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