Sets Wrapper vm data and forces update on each Wrapper in WrapperArray.
Note every Wrapper must contain a Vue instance.
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Arguments:
{Object} data
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Example:
import { mount } from 'vue-test-utils'
import { expect } from 'chai'
import Foo from './Foo.vue'
import Bar from './Bar.vue'
const wrapper = mount(Foo)
const barArray = wrapper.findAll(Bar)
barArray.setData({ foo: 'bar' })
expect(barArray.at(0).vm.foo).toBe('bar')