vue/test-utils failed to trigger events on quasar q-input

Even though this thread is old, I hope my answer could help in some way. I stumbled over this question too with a similar problem by trying to get the validation message, when the input is empty. I couldn't get it working either with focus and blur or even not with using an empty value. I kept trying to get it finally working with the empty value.

@Ryan Grahams Solution helped me to get to a passed test, that I had to struggle with. After successfully reaching the validation message via the refs, it tried to achieve the same by accessing the validate() method of the QInput Component itself.

Instead using Quasar as a plugin I imported QInput and used findComponent(QInput). additionally accessing the QInput method validate() through the view model.

I refactored your code like how it could work.

// registration.spec.ts

import RegistrationForm from "./registration.vue"
import { QInput } from "quasar"
import { mount } from "@vue/test-utils"

describe("test registration vue component", async () => {
  test("should show error when focus on full name", async () => {
    const wrapper = mount(RegistrationForm, {
      global: {
        plugins: [QInput],
      },
    })

    const fullName = wrapper.findComponent(QInput)

    await fullName.setValue("")
    await fullName.vm.validate()

    wrapper.get("[role='alert']")
  })
})

Maybe this could be helpful, if not, pease correct me :)

Try adding a ref to your input, then manually validate the ref like this..

fullname.setValue('your value here...')
 await wrapper.vm.$refs.yourInputRef.validate()

 it("Should show error when input is blank", async () => {
        const wrapper = factory({
            emailLabel: "Email",
        });

        const emailInput = wrapper.find("input[aria-label='Email']");
        await emailInput.setValue("")
        await wrapper.vm.$refs.emailAddressRef.validate()
        const alert = wrapper.find("div[role='alert']");

        expect(alert.text()).toEqual(invalidEmailError)
    });