Ways to conceal the warning message "Getting [Vue warn]: Invalid prop: type check failed for prop ..." during testing?

I am currently working on a VUE component that takes in a prop of type Number. I am trying to write a test, using vue test utils and jest, to cover the scenario where the prop is not a number and see how it renders in such a situation (let's say the value is an A character). The problem I am encountering is that the test runner displays a warning message: 

[Vue warn]: Invalid prop: type check failed for prop "count". Expected Number with value NaN, got String with value "A".

While I understand why this warning occurs, I still want to have the test in place without the warning message showing up.

Therefore, I am searching for a way to ignore or suppress the warning when running tests. Is there a way to accomplish this? Thank you.

javascriptvue.jstesting

Answer №1

To modify the app.config.warnHandler using the global.config mounting option in order to filter out specific warnings, follow this example:

const wrapper = mount(MyComponent, {
  props: {
    count: 'A', // Ensure it is a number
  },
  global: {
    config: {
      warnHandler(msg, instance, trace) {
        if (msg.includes('Invalid prop: type check failed for prop "count"')) {
          // Ignore this particular warning
          return
        }
        console.warn(msg, instance, trace)
      },
    }
  }
})

Check out the demo here

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