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Mock tRPC query and mutation calls using msw (works well with both vitest and jest)
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| import { QueryClient, QueryClientProvider } from "@tanstack/react-query"; | |
| import { render, type RenderOptions } from "@testing-library/react"; | |
| import { createTRPCReact, httpLink } from "@trpc/react-query"; | |
| import { createTRPCMsw } from "msw-trpc"; | |
| import { type ReactElement } from "react"; | |
| import superjson from "superjson"; | |
| import { type AppRouter } from "@/server/api/root"; | |
| const mockedTRPC = createTRPCReact<AppRouter>({ | |
| unstable_overrides: { | |
| useMutation: { | |
| async onSuccess(opts) { | |
| await opts.originalFn(); | |
| await opts.queryClient.invalidateQueries(); | |
| }, | |
| }, | |
| }, | |
| }); | |
| const mockedTRPCClient = mockedTRPC.createClient({ | |
| transformer: superjson, | |
| links: [httpLink({ url: "http://localhost:3000/api/trpc" })], | |
| }); | |
| const mockedQueryClient = new QueryClient(); | |
| export const MockedTRPCProvider = (props: { children: React.ReactNode }) => { | |
| return ( | |
| <mockedTRPC.Provider client={mockedTRPCClient} queryClient={mockedQueryClient}> | |
| <QueryClientProvider client={mockedQueryClient}>{props.children}</QueryClientProvider> | |
| </mockedTRPC.Provider> | |
| ); | |
| }; | |
| export const renderWithTRPC = (ui: ReactElement, options?: Omit<RenderOptions, "wrapper">) => { | |
| return render(ui, { | |
| wrapper: (props) => <MockedTRPCProvider {...props} />, | |
| ...options, | |
| }); | |
| }; | |
| export const trpcMsw = createTRPCMsw<AppRouter>({ | |
| transformer: { input: superjson, output: superjson }, | |
| }); |
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Example:
https://github.com/c-ehrlich/msw-trpc-example/blob/main/src/components/greeting.test.tsx