jakciehan
72 lines
2.2 KiB
TypeScript
72 lines
2.2 KiB
TypeScript
import { StorageMgr, IStorageDriver } from '@common/StorageMgr';
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function makeMemoryDriver(): IStorageDriver {
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const m = new Map<string, string>();
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return {
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getItem: (k) => (m.has(k) ? (m.get(k) as string) : null),
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setItem: (k, v) => {
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m.set(k, v);
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},
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removeItem: (k) => {
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m.delete(k);
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},
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};
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}
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describe('StorageMgr', () => {
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it('returns default when key is missing', () => {
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const sm = new StorageMgr(makeMemoryDriver());
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expect(sm.get('nope', { v: 1 })).toEqual({ v: 1 });
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});
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it('round-trips structured values via JSON', () => {
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const sm = new StorageMgr(makeMemoryDriver());
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const layout = { jump: { x: 100, y: 40 }, shuriken: { x: 820, y: 40 } };
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sm.set('layout', layout);
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expect(sm.get('layout', null)).toEqual(layout);
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});
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it('returns default when value is malformed JSON (req 17.6)', () => {
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const broken: IStorageDriver = {
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getItem: () => '{not json',
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setItem: () => {},
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removeItem: () => {},
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};
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const sm = new StorageMgr(broken);
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expect(sm.get('x', 'fallback')).toBe('fallback');
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});
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it('does not throw when the driver throws (req 17.6)', () => {
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const exploding: IStorageDriver = {
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getItem: () => {
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throw new Error('I/O error');
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},
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setItem: () => {
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throw new Error('I/O error');
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},
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removeItem: () => {},
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};
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const sm = new StorageMgr(exploding);
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expect(() => sm.get('x', 'ok')).not.toThrow();
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expect(sm.get('x', 'ok')).toBe('ok');
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expect(() => sm.set('x', 'value')).not.toThrow();
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});
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it('remove() deletes the key', () => {
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const sm = new StorageMgr(makeMemoryDriver());
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sm.set('k', 123);
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sm.remove('k');
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expect(sm.get('k', -1)).toBe(-1);
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});
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it('setDriver swaps the underlying driver', () => {
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const sm = new StorageMgr(makeMemoryDriver());
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sm.set('k', 1);
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const fresh = makeMemoryDriver();
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sm.setDriver(fresh);
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expect(sm.get('k', 0)).toBe(0);
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sm.set('k', 2);
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expect(sm.get('k', 0)).toBe(2);
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});
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});
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