96 lines
2.7 KiB
TypeScript
96 lines
2.7 KiB
TypeScript
import { setJsonItem, getJsonItem, updateJsonItem } from './local-storage';
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const LS_KEY = 'test';
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describe('getJsonItem', () => {
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afterAll(() => {
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localStorage.clear();
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});
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it('should set json to empty localStorage', () => {
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setJsonItem<Record<string, string>>(LS_KEY, {});
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expect(localStorage.getItem(LS_KEY)).toBe('{}');
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});
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it('should update json in localStorage', () => {
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setJsonItem(LS_KEY, []);
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expect(localStorage.getItem(LS_KEY)).toBe('[]');
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});
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});
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describe('setJsonItem', () => {
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let consoleSpy: jest.SpyInstance;
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beforeEach(() => {
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consoleSpy = jest.spyOn(console, 'error').mockImplementation();
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});
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afterEach(() => {
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localStorage.clear();
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});
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it('should return null when localStorage is empty', () => {
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expect(getJsonItem(LS_KEY)).toBe(null);
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});
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it('should return value of key', () => {
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localStorage.setItem(LS_KEY, JSON.stringify({}));
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expect(getJsonItem(LS_KEY)).toEqual({});
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localStorage.setItem(LS_KEY, JSON.stringify([]));
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expect(getJsonItem(LS_KEY)).toEqual([]);
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localStorage.setItem(LS_KEY, JSON.stringify(null));
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expect(getJsonItem(LS_KEY)).toBe(null);
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localStorage.setItem(LS_KEY, JSON.stringify(1));
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expect(getJsonItem(LS_KEY)).toBe(1);
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localStorage.setItem(LS_KEY, JSON.stringify(1));
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expect(getJsonItem(LS_KEY)).toBe(1);
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});
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it('should return `null` if value in localStorage is not JSON', () => {
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localStorage.setItem(LS_KEY, '"{:"""');
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expect(getJsonItem(LS_KEY)).toBe(null);
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expect(consoleSpy).toHaveBeenCalled();
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localStorage.setItem(LS_KEY, 'asdas');
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expect(getJsonItem(LS_KEY)).toBe(null);
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expect(consoleSpy).toHaveBeenCalled();
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});
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});
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describe('updateJsonItem', () => {
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afterEach(() => {
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localStorage.clear();
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});
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it('should set data to empty localStorage', () => {
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updateJsonItem(LS_KEY, {});
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expect(localStorage.getItem(LS_KEY)).toBe(JSON.stringify({}));
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});
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it('should update object in localStorage', () => {
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localStorage.setItem(LS_KEY, JSON.stringify({ x: 1 }));
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updateJsonItem(LS_KEY, { y: 1 });
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expect(localStorage.getItem(LS_KEY)).toBe(JSON.stringify({ x: 1, y: 1 }));
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});
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it('should update array in localStorage', () => {
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localStorage.setItem(LS_KEY, JSON.stringify([1, 2, 3]));
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updateJsonItem(LS_KEY, [4, 5, 6]);
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expect(localStorage.getItem(LS_KEY)).toBe(JSON.stringify([1, 2, 3, 4, 5, 6]));
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});
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it('should update data in localStorage with merge', () => {
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localStorage.setItem(LS_KEY, JSON.stringify([3, 4, 5]));
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updateJsonItem(LS_KEY, (data: unknown[]) => [1, 2, ...data]);
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expect(localStorage.getItem(LS_KEY)).toBe(JSON.stringify([1, 2, 3, 4, 5]));
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});
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});
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