0👍
I found that the solution is to pass the password data into the component constructor since it is bound like this <input v-model="password">
to the input tag.
let thePassword = '123'
// Extend the component to get the constructor, which we can then initialize directly.
const Constructor = Vue.extend(Signup)
const component = new Constructor({
propsData: {
emailentry: email
},
data: {
password: thePassword
}
}).$mount()
Now the tests are working.
Source:stackexchange.com