import { shallowMount } from '@vue/test-utils' import MasonryGrid from './MasonryGrid' describe('MasonryGrid', () => { let wrapper beforeEach(() => { wrapper = shallowMount(MasonryGrid) }) it('adds the "reset-grid-height" class when one or more children are updating', () => { wrapper.trigger('calculating-item-height') expect(wrapper.classes()).toContain('reset-grid-height') }) it('removes the "reset-grid-height" class when all children have completed updating', () => { wrapper.setData({ itemsCalculating: 1 }) wrapper.trigger('finished-calculating-item-height') expect(wrapper.classes()).not.toContain('reset-grid-height') }) })