Support Vue 2.7.16

[baboon-king]

Subject of the issue

Hi！
I doing this vuejs/create-vue#408

type definition not work with Vue 2.7.16

Steps to reproduce

1. clone https://github.com/baboon-king/vue-test-utils-bug-miss-type-for-vue-2.7.16
2. pnpm i
3. pnpm run type-check
4. focus terminal

xxxxx@XXXXXX-Air typescript-jsx-pinia-vitest-cypress % pnpm run type-check

> typescript-jsx-pinia-vitest-cypress@0.0.0 type-check /Users/baboon/Downloads/create-vue-test/typescript-jsx-pinia-vitest-cypress
> vue-tsc --noEmit -p tsconfig.vitest.json --composite false

src/components/__tests__/HelloWorld.spec.ts:8:27 - error TS2769: No overload matches this call.
  The last overload gave the following error.
    Argument of type 'ComponentPublicInstanceConstructor<Vue3Instance<{}, Readonly<ExtractPropTypes<__VLS_TypePropsToRuntimeProps<{ msg: string; }>>>, Readonly<ExtractPropTypes<__VLS_TypePropsToRuntimeProps<{ msg: string; }>>>, {}, {}, true, ComponentOptionsBase<...>> & ... 4 more ... & Readonly<...>, ... 4 more ..., MethodOptions> & Com...' is not assignable to parameter of type 'ExtendedVue<Vue<Record<string, any>, Record<string, any>, never, never, (event: string, ...args: any[]) => Vue<Record<string, any>, Record<string, any>, never, never, ...>>, ... 6 more ..., ComponentOptionsMixin>'.
      Type 'ComponentPublicInstanceConstructor<Vue3Instance<{}, Readonly<ExtractPropTypes<__VLS_TypePropsToRuntimeProps<{ msg: string; }>>>, Readonly<ExtractPropTypes<__VLS_TypePropsToRuntimeProps<{ msg: string; }>>>, {}, {}, true, ComponentOptionsBase<...>> & ... 4 more ... & Readonly<...>, ... 4 more ..., MethodOptions> & Com...' is missing the following properties from type 'VueConstructor<ExtractComputedReturns<{}> & DefaultProps & Vue<Record<string, any>, Record<string, any>, never, never, (event: string, ...args: any[]) => Vue<...>> & ShallowUnwrapRef<...> & Vue<...>>': extend, nextTick, set, delete, and 10 more.

8     const wrapper = mount(HelloWorld, { propsData: { msg: 'Hello Vitest' } })
                            ~~~~~~~~~~

  node_modules/.pnpm/@vue+test-utils@1.3.6_vue-template-compiler@2.7.16_vue@2.7.16/node_modules/@vue/test-utils/types/index.d.ts:195:25
    195 export declare function mount<V extends Vue, Props = DefaultProps> (component: ExtendedVue<V, {}, {}, {}, Props>, options?: FunctionalComponentMountOptions<V>): Wrapper<CombinedVueInstance<V, {}, {}, {}, Props> & Vue>
                                ~~~~~
    The last overload is declared here.


Found 1 error in src/components/__tests__/HelloWorld.spec.ts:8

 ELIFECYCLE  Command failed with exit code 2.

Expected behaviour

worked

Actual behaviour

not worked

Possible Solution

I try install @vue/test-utils@2.4.3. but it only work with Vue 3. see vuejs/test-utils#2289

so, That's why I came here.

[mohanyin]

Not an optimal solution, but I was able to work around this by patching the types:

import type { ComponentPublicInstanceConstructor } from 'vue/types/v3-component-public-instance';

...

declare module '@vue/test-utils' {
  export function mount<T extends ComponentPublicInstanceConstructor>(
    originalComponent: T,
    options?: ThisTypedMountOptions<Vue>
  ): Wrapper<Vue>;
}

[baboon-king]

Not an optimal solution, but I was able to work around this by patching the types:

import type { ComponentPublicInstanceConstructor } from 'vue/types/v3-component-public-instance';

...

declare module '@vue/test-utils' {
  export function mount<T extends ComponentPublicInstanceConstructor>(
    originalComponent: T,
    options?: ThisTypedMountOptions<Vue>
  ): Wrapper<Vue>;
}

@mohanyin
Thank you, this is a good idea until the repository maintainer fixes the issue.
Truth be told, I think you can open a PR. 😇