feat: add Component props support to createRoutesStub

.changeset/eighty-mangos-move.md

@@ -0,0 +1,24 @@
+---
+"react-router": minor
+---
+
+Add support for route component props in `createRoutesStub`. This allows you to unit test your route components using the props instead of the hooks:
+
+```tsx
+let RoutesStub = createRoutesStub([
+  {
+    path: "/",
+    Component({ loaderData }) {
+      let data = loaderData as { message: string };
+      return <pre data-testid="data">Message: {data.message}</pre>;
+    },
+    loader() {
+      return { message: "hello" };
+    },
+  },
+]);
+
+render(<RoutesStub />);
+
+await waitFor(() => screen.findByText("Message: hello"));
+```

packages/react-router-dev/vite/with-props.ts

@@ -17,6 +17,9 @@ export const plugin: Plugin = {
   },
   async load(id) {
     if (id !== vmod.resolvedId) return;
+
+    // Note: If you make changes to these implementations, please also update
+    // the corresponding functions in packages/react-router/lib/dom/ssr/routes-test-stub.tsx
     return dedent`
       import { createElement as h } from "react";
       import { useActionData, useLoaderData, useMatches, useParams, useRouteError } from "react-router";

packages/react-router/__tests__/dom/stub-test.tsx

@@ -10,6 +10,7 @@ import {
   useMatches,
   createRoutesStub,
   type LoaderFunctionArgs,
+  useRouteError,
 } from "../../index";
 import { unstable_createContext } from "../../lib/router/utils";
 
@@ -73,6 +74,27 @@ test("loaders work", async () => {
   await waitFor(() => screen.findByText("Message: hello"));
 });
 
+// eslint-disable-next-line jest/expect-expect
+test("loaders work with props", async () => {
+  let RoutesStub = createRoutesStub([
+    {
+      path: "/",
+      HydrateFallback: () => null,
+      Component({ loaderData }) {
+        let data = loaderData as { message: string };
+        return <pre data-testid="data">Message: {data.message}</pre>;
+      },
+      loader() {
+        return { message: "hello" };
+      },
+    },
+  ]);
+
+  render(<RoutesStub />);
+
+  await waitFor(() => screen.findByText("Message: hello"));
+});
+
 // eslint-disable-next-line jest/expect-expect
 test("actions work", async () => {
   let RoutesStub = createRoutesStub([
@@ -99,6 +121,75 @@ test("actions work", async () => {
   await waitFor(() => screen.findByText("Message: hello"));
 });
 
+// eslint-disable-next-line jest/expect-expect
+test("actions work with props", async () => {
+  let RoutesStub = createRoutesStub([
+    {
+      path: "/",
+      Component({ actionData }) {
+        let data = actionData as { message: string } | undefined;
+        return (
+          <Form method="post">
+            <button type="submit">Submit</button>
+            {data ? <pre>Message: {data.message}</pre> : null}
+          </Form>
+        );
+      },
+      action() {
+        return Response.json({ message: "hello" });
+      },
+    },
+  ]);
+
+  render(<RoutesStub />);
+
+  user.click(screen.getByText("Submit"));
+  await waitFor(() => screen.findByText("Message: hello"));
+});
+
+// eslint-disable-next-line jest/expect-expect
+test("errors work", async () => {
+  let spy = jest.spyOn(console, "error").mockImplementation(() => {});
+  let RoutesStub = createRoutesStub([
+    {
+      path: "/",
+      Component() {
+        throw new Error("Broken!");
+      },
+      ErrorBoundary() {
+        let error = useRouteError() as Error;
+        return <p>Error: {error.message}</p>;
+      },
+    },
+  ]);
+
+  render(<RoutesStub />);
+
+  await waitFor(() => screen.findByText("Error: Broken!"));
+  spy.mockRestore();
+});
+
+// eslint-disable-next-line jest/expect-expect
+test("errors work with prop", async () => {
+  let spy = jest.spyOn(console, "error").mockImplementation(() => {});
+  let RoutesStub = createRoutesStub([
+    {
+      path: "/",
+      Component() {
+        throw new Error("Broken!");
+      },
+      ErrorBoundary({ error }) {
+        return <p>Error: {(error as Error).message}</p>;
+      },
+    },
+  ]);
+
+  render(<RoutesStub />);
+
+  await waitFor(() => screen.findByText("Error: Broken!"));
+  spy.mockRestore();
+});
+
 // eslint-disable-next-line jest/expect-expect
 test("fetchers work", async () => {
   let count = 0;

packages/react-router/lib/dom/ssr/routes-test-stub.tsx

@@ -21,30 +21,66 @@ import type {
 import { Outlet, RouterProvider, createMemoryRouter } from "../../components";
 import type { EntryRoute } from "./routes";
 import { FrameworkContext } from "./components";
+import {
+  useParams,
+  useLoaderData,
+  useActionData,
+  useMatches,
+  useRouteError,
+} from "../../hooks";
 
-interface StubIndexRouteObject
-  extends Omit<
-    IndexRouteObject,
-    "loader" | "action" | "element" | "errorElement" | "children"
-  > {
+interface StubRouteExtensions {
+  Component?: React.ComponentType<{
+    params: ReturnType<typeof useParams>;
+    loaderData: ReturnType<typeof useLoaderData>;
+    actionData: ReturnType<typeof useActionData>;
+    matches: ReturnType<typeof useMatches>;
+  }>;
+  HydrateFallback?: React.ComponentType<{
+    params: ReturnType<typeof useParams>;
+    loaderData: ReturnType<typeof useLoaderData>;
+    actionData: ReturnType<typeof useActionData>;
+  }>;
+  ErrorBoundary?: React.ComponentType<{
+    params: ReturnType<typeof useParams>;
+    loaderData: ReturnType<typeof useLoaderData>;
+    actionData: ReturnType<typeof useActionData>;
+    error: ReturnType<typeof useRouteError>;
+  }>;
   loader?: LoaderFunction;
   action?: ActionFunction;
   children?: StubRouteObject[];
   meta?: MetaFunction;
   links?: LinksFunction;
 }
 
+interface StubIndexRouteObject
+  extends Omit<
+      IndexRouteObject,
+      | "Component"
+      | "HydrateFallback"
+      | "ErrorBoundary"
+      | "loader"
+      | "action"
+      | "element"
+      | "errorElement"
+      | "children"
+    >,
+    StubRouteExtensions {}
+
 interface StubNonIndexRouteObject
   extends Omit<
-    NonIndexRouteObject,
-    "loader" | "action" | "element" | "errorElement" | "children"
-  > {
-  loader?: LoaderFunction;
-  action?: ActionFunction;
-  children?: StubRouteObject[];
-  meta?: MetaFunction;
-  links?: LinksFunction;
-}
+      NonIndexRouteObject,
+      | "Component"
+      | "HydrateFallback"
+      | "ErrorBoundary"
+      | "loader"
+      | "action"
+      | "element"
+      | "errorElement"
+      | "children"
+    >,
+    StubRouteExtensions {}
 
 type StubRouteObject = StubIndexRouteObject | StubNonIndexRouteObject;
 
@@ -141,6 +177,41 @@ export function createRoutesStub(
   };
 }
 
+// Implementations copied from packages/react-router-dev/vite/with-props.ts
+function withComponentProps(Component: React.ComponentType<any>) {
+  return function Wrapped() {
+    return React.createElement(Component, {
+      params: useParams(),
+      loaderData: useLoaderData(),
+      actionData: useActionData(),
+      matches: useMatches(),
+    });
+  };
+}
+
+function withHydrateFallbackProps(HydrateFallback: React.ComponentType<any>) {
+  return function Wrapped() {
+    const props = {
+      params: useParams(),
+      loaderData: useLoaderData(),
+      actionData: useActionData(),
+    };
+    return React.createElement(HydrateFallback, props);
+  };
+}
+
+function withErrorBoundaryProps(ErrorBoundary: React.ComponentType<any>) {
+  return function Wrapped() {
+    const props = {
+      params: useParams(),
+      loaderData: useLoaderData(),
+      actionData: useActionData(),
+      error: useRouteError(),
+    };
+    return React.createElement(ErrorBoundary, props);
+  };
+}
+
 function processRoutes(
   routes: StubRouteObject[],
   manifest: AssetsManifest,
@@ -158,9 +229,15 @@ function processRoutes(
       id: route.id,
       path: route.path,
       index: route.index,
-      Component: route.Component,
-      HydrateFallback: route.HydrateFallback,
-      ErrorBoundary: route.ErrorBoundary,
+      Component: route.Component
+        ? withComponentProps(route.Component)
+        : undefined,
+      HydrateFallback: route.HydrateFallback
+        ? withHydrateFallbackProps(route.HydrateFallback)
+        : undefined,
+      ErrorBoundary: route.ErrorBoundary
+        ? withErrorBoundaryProps(route.ErrorBoundary)
+        : undefined,
       action: route.action,
       loader: route.loader,
       handle: route.handle,
@@ -193,8 +270,8 @@ function processRoutes(
 
     // Add the route to routeModules
     routeModules[route.id] = {
-      default: route.Component || Outlet,
-      ErrorBoundary: route.ErrorBoundary || undefined,
+      default: newRoute.Component || Outlet,
+      ErrorBoundary: newRoute.ErrorBoundary || undefined,
       handle: route.handle,
       links: route.links,
       meta: route.meta,