How to test whether the child component in the parent component is called correctly with the correct props when the child component is mocked. I get the error:
RangeError: Maximum call stack size exceeded
My vitest configuration:
import svgr from 'vite-plugin-svgr'
import { defineConfig } from 'vitest/config'
import type { UserConfig } from 'vitest/config'
import { resolve } from 'path'
export default defineConfig({
test: {
environment: 'jsdom',
setupFiles: ['./tests/setup.ts'],
environmentMatchGlobs: [['./src/**/*.tsx', 'jsdom']],
globals: true,
},
resolve: {
alias: [{ find: '@', replacement: resolve(__dirname, './src') }],
},
plugins: [svgr()],
} as UserConfig)
My test code:
import { render, screen } from '@testing-library/react'
import { vi } from 'vitest'
import Input from '@/components/Input/Input'
import Login from './Login'
vi.mock('@/components/Input/Input', () => ({
default: vi.fn(),
}))
describe('ConfirmEmail', () => {
it('renders correctly', () => {
render(<Login />)
expect(screen.getByRole('heading', { name: /Login to your account/i }))
expect(Input).toHaveBeenCalledWith({
label: 'email',
}) //error: RangeError: Maximum call stack size exceeded
})
})
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It's like testing component props in jest. I referred this article as my solution: https://robertmarshall.dev/blog/react-component-props-passed-to-child-jest-unit-test/
Since you didn't include the original component, I can't verify the fix. I would try something like this:
const mockInput = vi.fn() vi.mock('@/components/Input/Input', () => ({ default: (props) => { mockInput(props) return <div>Input</div> }, })) describe('Confirm Email', () => { it('renders correctly', () => { render(<Login />) expect(screen.getByRole('heading', { name: /Login to your account/i })) expect(mock Input).toHaveBeenCalledWith( expect.objectContaining({ label: 'email' }) ) }) })