Triggers an event on every Wrapper in the WrapperArray DOM node.
Note every Wrapper must contain a Vue instance.
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Arguments:
{string} eventName
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Example:
import { mount } from '@vue/test-utils'
import { expect } from 'chai'
import sinon from 'sinon'
import Foo from './Foo.vue'
const clickHandler = sinon.stub()
const wrapper = mount(Foo, {
propsData: { clickHandler }
})
const divArray = wrapper.findAll('div')
divArray.trigger('click')
expect(clickHandler.called).toBe(true)