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import { shallowMount } from '@vue/test-utils';
import LocalStorageSync from '~/vue_shared/components/local_storage_sync.vue';
describe('Local Storage Sync', () => {
let wrapper;
const createComponent = ({ props = {}, slots = {} } = {}) => {
wrapper = shallowMount(LocalStorageSync, {
propsData: props,
slots,
});
};
afterEach(() => {
if (wrapper) {
wrapper.destroy();
}
wrapper = null;
localStorage.clear();
});
it('is a renderless component', () => {
const html = '<div class="test-slot"></div>';
createComponent({
props: {
storageKey: 'key',
},
slots: {
default: html,
},
});
expect(wrapper.html()).toBe(html);
});
describe('localStorage empty', () => {
const storageKey = 'issue_list_order';
it('does not emit input event', () => {
createComponent({
props: {
storageKey,
value: 'ascending',
},
});
expect(wrapper.emitted('input')).toBeFalsy();
});
it.each('foo', 3, true, ['foo', 'bar'], { foo: 'bar' })(
'saves updated value to localStorage',
(newValue) => {
createComponent({
props: {
storageKey,
value: 'initial',
},
});
wrapper.setProps({ value: newValue });
return wrapper.vm.$nextTick().then(() => {
expect(localStorage.getItem(storageKey)).toBe(String(newValue));
});
},
);
it('does not save default value', () => {
const value = 'ascending';
createComponent({
props: {
storageKey,
value,
},
});
expect(localStorage.getItem(storageKey)).toBe(null);
});
});
describe('localStorage has saved value', () => {
const storageKey = 'issue_list_order_by';
const savedValue = 'last_updated';
beforeEach(() => {
localStorage.setItem(storageKey, savedValue);
});
it('emits input event with saved value', () => {
createComponent({
props: {
storageKey,
value: 'ascending',
},
});
expect(wrapper.emitted('input')[0][0]).toBe(savedValue);
});
it('does not overwrite localStorage with prop value', () => {
createComponent({
props: {
storageKey,
value: 'created',
},
});
expect(localStorage.getItem(storageKey)).toBe(savedValue);
});
it('updating the value updates localStorage', () => {
createComponent({
props: {
storageKey,
value: 'created',
},
});
const newValue = 'last_updated';
wrapper.setProps({
value: newValue,
});
return wrapper.vm.$nextTick().then(() => {
expect(localStorage.getItem(storageKey)).toBe(newValue);
});
});
it('persists the value by default', async () => {
const persistedValue = 'persisted';
createComponent({
props: {
storageKey,
},
});
wrapper.setProps({ value: persistedValue });
await wrapper.vm.$nextTick();
expect(localStorage.getItem(storageKey)).toBe(persistedValue);
});
it('does not save a value if persist is set to false', async () => {
const notPersistedValue = 'notPersisted';
createComponent({
props: {
storageKey,
},
});
wrapper.setProps({ persist: false, value: notPersistedValue });
await wrapper.vm.$nextTick();
expect(localStorage.getItem(storageKey)).not.toBe(notPersistedValue);
});
});
describe('with "asJson" prop set to "true"', () => {
const storageKey = 'testStorageKey';
describe.each`
value | serializedValue
${null} | ${'null'}
${''} | ${'""'}
${true} | ${'true'}
${false} | ${'false'}
${42} | ${'42'}
${'42'} | ${'"42"'}
${'{ foo: '} | ${'"{ foo: "'}
${['test']} | ${'["test"]'}
${{ foo: 'bar' }} | ${'{"foo":"bar"}'}
`('given $value', ({ value, serializedValue }) => {
describe('is a new value', () => {
beforeEach(() => {
createComponent({
props: {
storageKey,
value: 'initial',
asJson: true,
},
});
wrapper.setProps({ value });
return wrapper.vm.$nextTick();
});
it('serializes the value correctly to localStorage', () => {
expect(localStorage.getItem(storageKey)).toBe(serializedValue);
});
});
describe('is already stored', () => {
beforeEach(() => {
localStorage.setItem(storageKey, serializedValue);
createComponent({
props: {
storageKey,
value: 'initial',
asJson: true,
},
});
});
it('emits an input event with the deserialized value', () => {
expect(wrapper.emitted('input')).toEqual([[value]]);
});
});
});
describe('with bad JSON in storage', () => {
const badJSON = '{ badJSON';
beforeEach(() => {
jest.spyOn(console, 'warn').mockImplementation();
localStorage.setItem(storageKey, badJSON);
createComponent({
props: {
storageKey,
value: 'initial',
asJson: true,
},
});
});
it('should console warn', () => {
// eslint-disable-next-line no-console
expect(console.warn).toHaveBeenCalledWith(
`[gitlab] Failed to deserialize value from localStorage (key=${storageKey})`,
badJSON,
);
});
it('should not emit an input event', () => {
expect(wrapper.emitted('input')).toBeUndefined();
});
});
});
it('clears localStorage when clear property is true', async () => {
const storageKey = 'key';
const value = 'initial';
createComponent({
props: {
storageKey,
},
});
wrapper.setProps({
value,
});
await wrapper.vm.$nextTick();
expect(localStorage.getItem(storageKey)).toBe(value);
wrapper.setProps({
clear: true,
});
await wrapper.vm.$nextTick();
expect(localStorage.getItem(storageKey)).toBe(null);
});
});
|
