Copy plugin in Vue Cypress component test

Question

I'm using Cypress to component test my Vue application. Following the code examples at https://docs.cypress.io/guides/component-testing/vue/examples#Replicating-Plugins will produce several errors, as listed below:

Argument of type '(this: Context, component:
ComponentOptionsWithObjectProps<Readonly<ComponentPropsOptions<Data>>, unknown, {},
ComputedOptions, Record<string, Function>, ... 7 more ..., { ...; } | {}>, options?:
MountingOptions<...> | undefined) => Chainable<...>' is not assignable to parameter of type
'CommandFn<"mount">'.
  Type 'Chainable<{ wrapper: VueWrapper<ComponentPublicInstance<{ [x: number]: unknown; } & {
readonly length?: number | Prop<unknown, unknown> | null | undefined; readonly concat?:
Prop<unknown, unknown> | { (...items: ConcatArray<string>[]): string[]; (...items: (string |
ConcatArray<...>)[]): string[]; } | null | undefin...' is not assignable to type 'void |
Chainable<{ wrapper:
VueWrapper<ComponentPublicInstance<ExtractPropTypes<Readonly<ComponentPropsOptions<Data>>>,
unknown, {}, ComputedOptions, ... 6 more ..., {}>>; component: ComponentPublicInstance<...>;
}>'.

Property 'global' does not exist on type '[options?: MountingOptions<{ [x: number]: unknown; }
& { readonly length?: number | Prop<unknown, unknown> | null | undefined; readonly concat?:
Prop<unknown, unknown> | { (...items: ConcatArray<string>[]): string[]; (...items: (string |
ConcatArray<...>)[]): string[]; } | null | undefined; ... 12 more ...; toLocale...'.

Cannot find name 'Vapp'.

No overload matches this call.
  The last overload gave the following error.

I'm using TypeScript.Can someone provide me with a working code snippet? My code is as follows:

import { createPinia } from "pinia";
import i18n from "../../src/locales/i18n";
import { mount } from "cypress/vue";
import { h } from "vue";

declare global {
  namespace Cypress {
    interface Chainable {
      mount: typeof mount;
    }
  }
}

Cypress.Commands.add("mount", (component, ...args) => {
  args.global = args.global || {};
  args.global.plugins = args.global.plugins || [];
  args.global.plugins.push(createPinia());
  args.global.plugins.push(i18n);

  return mount(() => {
    return h(Vapp, {}, component)
  }, ...args);
});

Does anyone know how to fix this? How do I call this mount function when using it in tests?

Answer 1

I solved this problem using Vue Test Utils syntax. In /support/component.ts:

import { mount } from "cypress/vue";

Cypress.Commands.add("mount", (component) => {
  return mount(component, {
    global: {
      plugins: [createPinia(), i18n],
    },
  });
});