2020-04-22 19:07:51 +05:30
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import { shallowMount } from '@vue/test-utils';
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import LocalStorageSync from '~/vue_shared/components/local_storage_sync.vue';
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describe('Local Storage Sync', () => {
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let wrapper;
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const createComponent = ({ props = {}, slots = {} } = {}) => {
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wrapper = shallowMount(LocalStorageSync, {
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propsData: props,
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slots,
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});
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};
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afterEach(() => {
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2021-01-03 14:25:43 +05:30
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if (wrapper) {
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wrapper.destroy();
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}
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2020-04-22 19:07:51 +05:30
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wrapper = null;
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localStorage.clear();
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});
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it('is a renderless component', () => {
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const html = '<div class="test-slot"></div>';
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createComponent({
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props: {
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storageKey: 'key',
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},
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slots: {
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default: html,
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},
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});
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expect(wrapper.html()).toBe(html);
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});
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describe('localStorage empty', () => {
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const storageKey = 'issue_list_order';
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it('does not emit input event', () => {
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createComponent({
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props: {
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storageKey,
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value: 'ascending',
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},
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});
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expect(wrapper.emitted('input')).toBeFalsy();
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});
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2021-01-03 14:25:43 +05:30
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it.each('foo', 3, true, ['foo', 'bar'], { foo: 'bar' })(
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'saves updated value to localStorage',
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newValue => {
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createComponent({
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props: {
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storageKey,
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value: 'initial',
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},
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});
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wrapper.setProps({ value: newValue });
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return wrapper.vm.$nextTick().then(() => {
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expect(localStorage.getItem(storageKey)).toBe(String(newValue));
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});
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},
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);
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2020-04-22 19:07:51 +05:30
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it('does not save default value', () => {
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const value = 'ascending';
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createComponent({
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props: {
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storageKey,
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value,
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},
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});
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expect(localStorage.getItem(storageKey)).toBe(null);
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});
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});
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describe('localStorage has saved value', () => {
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const storageKey = 'issue_list_order_by';
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const savedValue = 'last_updated';
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beforeEach(() => {
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localStorage.setItem(storageKey, savedValue);
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});
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it('emits input event with saved value', () => {
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createComponent({
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props: {
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storageKey,
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value: 'ascending',
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},
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});
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expect(wrapper.emitted('input')[0][0]).toBe(savedValue);
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});
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it('does not overwrite localStorage with prop value', () => {
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createComponent({
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props: {
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storageKey,
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value: 'created',
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},
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});
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expect(localStorage.getItem(storageKey)).toBe(savedValue);
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});
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it('updating the value updates localStorage', () => {
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createComponent({
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props: {
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storageKey,
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value: 'created',
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},
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});
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const newValue = 'last_updated';
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wrapper.setProps({
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value: newValue,
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});
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return wrapper.vm.$nextTick().then(() => {
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expect(localStorage.getItem(storageKey)).toBe(newValue);
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});
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});
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2021-01-03 14:25:43 +05:30
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it('persists the value by default', async () => {
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const persistedValue = 'persisted';
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createComponent({
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props: {
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storageKey,
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},
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});
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wrapper.setProps({ value: persistedValue });
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await wrapper.vm.$nextTick();
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expect(localStorage.getItem(storageKey)).toBe(persistedValue);
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});
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it('does not save a value if persist is set to false', async () => {
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const notPersistedValue = 'notPersisted';
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createComponent({
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props: {
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storageKey,
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},
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});
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wrapper.setProps({ persist: false, value: notPersistedValue });
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await wrapper.vm.$nextTick();
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expect(localStorage.getItem(storageKey)).not.toBe(notPersistedValue);
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});
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});
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describe('with "asJson" prop set to "true"', () => {
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const storageKey = 'testStorageKey';
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describe.each`
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value | serializedValue
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${null} | ${'null'}
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${''} | ${'""'}
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${true} | ${'true'}
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${false} | ${'false'}
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${42} | ${'42'}
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${'42'} | ${'"42"'}
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${'{ foo: '} | ${'"{ foo: "'}
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${['test']} | ${'["test"]'}
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${{ foo: 'bar' }} | ${'{"foo":"bar"}'}
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`('given $value', ({ value, serializedValue }) => {
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describe('is a new value', () => {
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beforeEach(() => {
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createComponent({
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props: {
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storageKey,
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value: 'initial',
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asJson: true,
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},
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});
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wrapper.setProps({ value });
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return wrapper.vm.$nextTick();
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});
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it('serializes the value correctly to localStorage', () => {
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expect(localStorage.getItem(storageKey)).toBe(serializedValue);
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});
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});
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describe('is already stored', () => {
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beforeEach(() => {
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localStorage.setItem(storageKey, serializedValue);
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createComponent({
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props: {
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storageKey,
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value: 'initial',
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asJson: true,
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},
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});
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});
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it('emits an input event with the deserialized value', () => {
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expect(wrapper.emitted('input')).toEqual([[value]]);
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});
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});
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});
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describe('with bad JSON in storage', () => {
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const badJSON = '{ badJSON';
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beforeEach(() => {
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jest.spyOn(console, 'warn').mockImplementation();
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localStorage.setItem(storageKey, badJSON);
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createComponent({
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props: {
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storageKey,
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value: 'initial',
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asJson: true,
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},
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});
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});
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it('should console warn', () => {
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// eslint-disable-next-line no-console
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expect(console.warn).toHaveBeenCalledWith(
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`[gitlab] Failed to deserialize value from localStorage (key=${storageKey})`,
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badJSON,
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);
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});
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it('should not emit an input event', () => {
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expect(wrapper.emitted('input')).toBeUndefined();
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});
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});
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2020-04-22 19:07:51 +05:30
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});
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});
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