Potential bug in event handling

[VPenkov]

Version

1.0.0-beta.16

Reproduction link

https://codesandbox.io/s/v6o7yjpmq0

Steps to reproduce

1. Run test.spec.js
2. See the results

What is expected?

• The test to pass when the template is defined with @click="testMethod()"
• The test to pass when the template is defined with @click="testMethod"

What is actually happening?

• The passes when the template is defined with @click="testMethod()"
• The fails when the template is defined with @click="testMethod"

---

Not sure if the issue is in vue-test-utils, this started happening after updating a bunch of packages recently.

[eddyerburgh]

The problem is when you spy on the method, the function in the on handler is not updated. You need to force Vue to update:

jest.spyOn(wrapper.vm, 'someMethod')
wrapper.vm.$forceUpdate()

Alternatively, you can use the Wrapper setMethods method which takes care of this for you:

wrapper.setMethods({ someMethod: jest.fn() })

Or pass the stub in when you mount the component:

mount(Component, {
  methods: {
    someMethod: jest.fn()
   }
})

[hjJunior]

@eddyerburgh I've got the same issue, even using wrapper.setMethods

I created a reproduce link:

https://codesandbox.io/s/vue-template-ev08b