Combining Vue-Test-Utils with TypeScript typings for wrapper.vm

So, I ran into an interesting situation. Has anyone ever worked with typescript + vue-test-utils and attempted to change a value for testing purposes like this: 

wrapper.vm.aCoolRefValueToManipulate = 'something much cooler'
?
I gave it a shot, and it actually worked. However, the ts linter didn't take too kindly to it because it was unfamiliar with aCoolRefValueToManipulate inside vm.

Any ideas on how to resolve this issue?

The linter provided me with this warning:

Property 'showTopDown' does not exist on type '{ $: ComponentInternalInstance; $data: {}; $props: Partial<{}> & Omit<Readonly<ExtractPropTypes<{}>> & VNodeProps & AllowedComponentProps & ComponentCustomProps, never>; ... 10 more ...; $watch(source: string | Function, cb: Function, options?: WatchOptions<...> | undefined): WatchStopHandle; } & Readonly<...> & Sha...'.ts(2339)

Resolution

I received assistance from a helpful individual on the official Vue Discord Server.

(wrapper.vm as any).aCoolRefValueToManipulate
typescriptvue.jsvue-test-utilstypescript-eslintvitest

Answer №1

Is there a different approach to accessing methods of wrapper.vm without using the keyword "any"?

I stumbled upon this alternative method that might work:

interface TestWrapper<T> extends VueWrapper<ComponentPublicInstance & T>
let wrapper: TestWrapper<Partial<{ myMethod: () => void }>>

wrapper.vm.myMethod?.()

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