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single-fetch-test.ts
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import { test, expect } from "@playwright/test";
import {
UNSAFE_ServerMode as ServerMode,
UNSAFE_SingleFetchRedirectSymbol as SingleFetchRedirectSymbol,
} from "react-router";
import {
createAppFixture,
createFixture,
js,
} from "./helpers/create-fixture.js";
import { PlaywrightFixture } from "./helpers/playwright-fixture.js";
import {
EXPRESS_SERVER,
createProject,
customDev,
reactRouterConfig,
viteConfig,
} from "./helpers/vite.js";
import getPort from "get-port";
const ISO_DATE = "2024-03-12T12:00:00.000Z";
const files = {
"app/root.tsx": js`
import { Form, Link, Links, Meta, Outlet, Scripts } from "react-router";
export function headers ({ actionHeaders, loaderHeaders, errorHeaders }) {
if (errorHeaders) {
return errorHeaders;
} else if ([...actionHeaders].length > 0) {
return actionHeaders;
} else {
return loaderHeaders;
}
}
export function loader() {
return {
message: "ROOT",
};
}
export default function Root() {
return (
<html lang="en">
<head>
<Meta />
<Links />
</head>
<body>
<Link to="/">Go to Home</Link><br/>
<Link to="/data">Go to Data</Link><br/>
<Link to="/a/b/c">Go to /a/b/c</Link><br/>
<Form method="post" action="/data">
<button type="submit" name="key" value="value">
Submit
</button>
</Form>
<Outlet />
<Scripts />
</body>
</html>
);
}
`,
"app/routes/_index.tsx": js`
export default function Index() {
return <h1>Index</h1>
}
`,
"app/routes/data.tsx": js`
import { useActionData, useLoaderData } from "react-router";
export async function action({ request }) {
let formData = await request.formData();
return {
key: formData.get('key'),
};
}
class MyClass {
a: string
b: bigint
constructor(a: string, b: bigint) {
this.a = a
this.b = b
}
c() {}
}
export function loader({ request }) {
if (new URL(request.url).searchParams.has("error")) {
throw new Error("Loader Error");
}
return {
message: "DATA",
date: new Date("${ISO_DATE}"),
function: () => {},
class: new MyClass("hello", BigInt(1)),
};
}
export default function Index() {
let data = useLoaderData();
let actionData = useActionData();
return (
<>
<h1 id="heading">Data Route</h1>
<p id="message">{data.message}</p>
<p id="date">{data.date.toISOString()}</p>
{actionData ? <p id="action-data">{actionData.key}</p> : null}
</>
)
}
`,
"app/routes/data-with-response.tsx": js`
import { useActionData, useLoaderData, data } from "react-router";
export function headers ({ actionHeaders, loaderHeaders, errorHeaders }) {
if ([...actionHeaders].length > 0) {
return actionHeaders;
} else {
return loaderHeaders;
}
}
export async function action({ request }) {
let formData = await request.formData();
return data({
key: formData.get('key'),
}, { status: 201, headers: { 'X-Action': 'yes' }});
}
class MyClass {
a: string
b: Date
constructor(a: string, b: Date) {
this.a = a
this.b = b
}
c() {}
}
export function loader({ request }) {
if (new URL(request.url).searchParams.has("error")) {
throw new Error("Loader Error");
}
return data({
message: "DATA",
date: new Date("${ISO_DATE}"),
function: () => {},
class: new MyClass("hello", BigInt(1)),
}, { status: 206, headers: { 'X-Loader': 'yes' }});
}
export default function DataWithResponse() {
let data = useLoaderData();
let actionData = useActionData();
return (
<>
<h1 id="heading">Data</h1>
<p id="message">{data.message}</p>
<p id="date">{data.date.toISOString()}</p>
{actionData ? <p id="action-data">{actionData.key}</p> : null}
</>
)
}
`,
};
test.describe("single-fetch", () => {
let oldConsoleError: typeof console.error;
test.beforeEach(() => {
oldConsoleError = console.error;
});
test.afterEach(() => {
console.error = oldConsoleError;
});
test("loads proper data on single fetch loader requests", async () => {
let fixture = await createFixture({
files,
});
let res = await fixture.requestSingleFetchData("/_root.data");
expect(res.data).toEqual({
root: {
data: {
message: "ROOT",
},
},
});
expect(res.headers.get("Content-Type")).toBe("text/x-script");
res = await fixture.requestSingleFetchData("/data.data");
expect(res.data).toStrictEqual({
root: {
data: {
message: "ROOT",
},
},
"routes/data": {
data: {
message: "DATA",
date: new Date(ISO_DATE),
function: undefined,
class: {
a: "hello",
b: BigInt(1),
},
},
},
});
});
test("loads proper errors on single fetch loader requests", async () => {
console.error = () => {};
let fixture = await createFixture(
{
files,
},
ServerMode.Development
);
let res = await fixture.requestSingleFetchData("/data.data?error=true");
expect(res.data).toEqual({
root: {
data: {
message: "ROOT",
},
},
"routes/data": {
error: new Error("Loader Error"),
},
});
});
test("loads proper data on single fetch action requests", async () => {
let fixture = await createFixture({
files,
});
let postBody = new URLSearchParams();
postBody.set("key", "value");
let res = await fixture.requestSingleFetchData("/data.data", {
method: "post",
body: postBody,
});
expect(res.data).toEqual({
data: {
key: "value",
},
});
});
test("loads proper data (via data()) on single fetch loader requests", async () => {
let fixture = await createFixture({
files,
});
let res = await fixture.requestSingleFetchData("/data-with-response.data");
expect(res.status).toEqual(206);
expect(res.headers.get("X-Loader")).toEqual("yes");
expect(res.data).toStrictEqual({
root: {
data: {
message: "ROOT",
},
},
"routes/data-with-response": {
data: {
message: "DATA",
date: new Date(ISO_DATE),
function: undefined,
class: {
a: "hello",
b: BigInt(1),
},
},
},
});
});
test("loads proper data (via data()) on single fetch action requests", async () => {
let fixture = await createFixture({
files,
});
let postBody = new URLSearchParams();
postBody.set("key", "value");
let res = await fixture.requestSingleFetchData("/data-with-response.data", {
method: "post",
body: postBody,
});
expect(res.status).toEqual(201);
expect(res.headers.get("X-Action")).toEqual("yes");
expect(res.data).toEqual({
data: {
key: "value",
},
});
});
test("loads proper data on document request", async ({ page }) => {
let fixture = await createFixture({
files,
});
let appFixture = await createAppFixture(fixture);
let app = new PlaywrightFixture(appFixture, page);
await app.goto("/data");
expect(await app.getHtml("#heading")).toContain("Data");
expect(await app.getHtml("#message")).toContain("DATA");
expect(await app.getHtml("#date")).toContain(ISO_DATE);
});
test("loads proper data on client side navigation", async ({ page }) => {
let fixture = await createFixture({
files,
});
let appFixture = await createAppFixture(fixture);
let app = new PlaywrightFixture(appFixture, page);
await app.goto("/");
await app.clickLink("/data");
await page.waitForSelector("#message");
expect(await app.getHtml("#heading")).toContain("Data");
expect(await app.getHtml("#message")).toContain("DATA");
expect(await app.getHtml("#date")).toContain(ISO_DATE);
});
test("loads proper data on client side action navigation", async ({
page,
}) => {
let fixture = await createFixture({
files,
});
let appFixture = await createAppFixture(fixture);
let app = new PlaywrightFixture(appFixture, page);
await app.goto("/");
await app.clickSubmitButton("/data");
await page.waitForSelector("#message");
expect(await app.getHtml("#heading")).toContain("Data");
expect(await app.getHtml("#message")).toContain("DATA");
expect(await app.getHtml("#date")).toContain(ISO_DATE);
expect(await app.getHtml("#action-data")).toContain("value");
});
test("allows fine-grained revalidation", async ({ page }) => {
let fixture = await createFixture({
files: {
...files,
"app/routes/no-revalidate.tsx": js`
import { Form, useActionData, useLoaderData, useNavigation } from 'react-router';
export async function action({ request }) {
let fd = await request.formData();
return { shouldRevalidate: fd.get('revalidate') === "yes" }
}
let count = 0;
export function loader() {
return { count: ++count };
}
export default function Comp() {
let navigation = useNavigation();
let data = useLoaderData();
let actionData = useActionData();
return (
<Form method="post">
<button type="submit" name="revalidate" value="yes">Submit w/Revalidation</button>
<button type="submit" name="revalidate" value="no">Submit w/o Revalidation</button>
<p id="data">{data.count}</p>
{navigation.state === "idle" ? <p id="idle">idle</p> : null}
{actionData ? <p id="action-data">yes</p> : null}
</Form>
);
}
export function shouldRevalidate({ actionResult }) {
return actionResult.shouldRevalidate === true;
}
`,
},
});
let urls: string[] = [];
page.on("request", (req) => {
if (req.method() === "GET" && req.url().includes(".data")) {
urls.push(req.url());
}
});
let appFixture = await createAppFixture(fixture);
let app = new PlaywrightFixture(appFixture, page);
await app.goto("/no-revalidate");
expect(await app.getHtml("#data")).toContain("1");
expect(urls).toEqual([]);
await page.click('button[name="revalidate"][value="yes"]');
await page.waitForSelector("#action-data");
await page.waitForSelector("#idle");
expect(await app.getHtml("#data")).toContain("2");
expect(urls).toEqual([expect.stringMatching(/\/no-revalidate\.data$/)]);
await page.click('button[name="revalidate"][value="no"]');
await page.waitForSelector("#action-data");
await page.waitForSelector("#idle");
expect(await app.getHtml("#data")).toContain("2");
expect(urls).toEqual([
expect.stringMatching(/\/no-revalidate\.data$/),
expect.stringMatching(/\/no-revalidate\.data\?_routes=root$/),
]);
});
test("revalidates on reused routes by default", async ({ page }) => {
let fixture = await createFixture({
files: {
...files,
"app/routes/_index.tsx": js`
import { Link } from "react-router";
export default function Index() {
return <Link to="/parent">Go to Parent</Link>
}
`,
"app/routes/parent.tsx": js`
import { Link, Outlet } from "react-router";
import type { Route } from "./+types/parent";
let count = 0;
export function loader() {
return ++count;
}
export default function Parent({ loaderData }: Route.ComponentProps) {
return (
<>
<h1 data-parent={loaderData}>PARENT:{loaderData}</h1>
<Link to="/parent">Go to Parent</Link><br/>
<Link to="/parent/child">Go to Child</Link>
<Outlet />
</>
);
}
`,
"app/routes/parent.child.tsx": js`
import { Outlet } from "react-router";
import type { Route } from "./+types/parent";
export function loader() {
return "CHILD"
}
export default function Parent({ loaderData }: Route.ComponentProps) {
return <h2 data-child>{loaderData}</h2>
}
`,
},
});
let urls: string[] = [];
page.on("request", (req) => {
let url = new URL(req.url());
if (req.method() === "GET" && url.pathname.endsWith(".data")) {
urls.push(url.pathname + url.search);
}
});
let appFixture = await createAppFixture(fixture);
let app = new PlaywrightFixture(appFixture, page);
await app.goto("/", true);
await app.clickLink("/parent");
await page.waitForSelector('[data-parent="1"]');
expect(urls).toEqual(["/parent.data"]);
urls.length = 0;
await app.clickLink("/parent/child");
await page.waitForSelector("[data-child]");
await expect(page.locator('[data-parent="2"]')).toBeDefined();
expect(urls).toEqual(["/parent/child.data"]);
urls.length = 0;
await app.clickLink("/parent");
await page.waitForSelector('[data-parent="3"]');
expect(urls).toEqual(["/parent.data"]);
urls.length = 0;
});
test("does not revalidate on 4xx/5xx action responses", async ({ page }) => {
let fixture = await createFixture({
files: {
...files,
"app/routes/action.tsx": js`
import { Form, Link, useActionData, useLoaderData, useNavigation } from 'react-router';
export async function action({ request }) {
let fd = await request.formData();
if (fd.get('throw') === "5xx") {
throw new Response("Thrown 500", { status: 500 });
}
if (fd.get('throw') === "4xx") {
throw new Response("Thrown 400", { status: 400 });
}
if (fd.get('return') === "5xx") {
return new Response("Returned 500", { status: 500 });
}
if (fd.get('return') === "4xx") {
return new Response("Returned 400", { status: 400 });
}
return null;
}
let count = 0;
export function loader() {
return { count: ++count };
}
export default function Comp() {
let navigation = useNavigation();
let data = useLoaderData();
return (
<Form method="post">
<button type="submit" name="throw" value="5xx">Throw 5xx</button>
<button type="submit" name="throw" value="4xx">Throw 4xx</button>
<button type="submit" name="return" value="5xx">Return 5xx</button>
<button type="submit" name="return" value="4xx">Return 4xx</button>
<p id="data">{data.count}</p>
{navigation.state === "idle" ? <p id="idle">idle</p> : null}
</Form>
);
}
export function ErrorBoundary() {
return (
<div>
<h1 id="error">Error</h1>
<Link to="/action">Back</Link>
</div>
);
}
`,
},
});
let urls: string[] = [];
page.on("request", (req) => {
if (req.method() === "GET" && req.url().includes(".data")) {
urls.push(req.url());
}
});
console.error = () => {};
let appFixture = await createAppFixture(fixture);
let app = new PlaywrightFixture(appFixture, page);
await app.goto("/action");
expect(await app.getHtml("#data")).toContain("1");
expect(urls).toEqual([]);
await page.click('button[name="return"][value="5xx"]');
await page.waitForSelector("#idle");
expect(await app.getHtml("#data")).toContain("1");
expect(urls).toEqual([]);
await page.click('button[name="return"][value="4xx"]');
await page.waitForSelector("#idle");
expect(await app.getHtml("#data")).toContain("1");
expect(urls).toEqual([]);
await page.click('button[name="throw"][value="5xx"]');
await page.waitForSelector("#error");
expect(urls).toEqual([]);
await app.clickLink("/action");
await page.waitForSelector("#data");
expect(await app.getHtml("#data")).toContain("2");
urls = [];
await page.click('button[name="throw"][value="4xx"]');
await page.waitForSelector("#error");
expect(urls).toEqual([]);
});
test("does not revalidate on 4xx/5xx action responses (via data())", async ({
page,
}) => {
let fixture = await createFixture({
files: {
...files,
"app/routes/action.tsx": js`
import { Form, Link, useActionData, useLoaderData, useNavigation, data } from 'react-router';
export async function action({ request }) {
let fd = await request.formData();
if (fd.get('throw') === "5xx") {
throw data("Thrown 500", { status: 500 });
}
if (fd.get('throw') === "4xx") {
throw data("Thrown 400", { status: 400 });
}
if (fd.get('return') === "5xx") {
return data("Returned 500", { status: 500 });
}
if (fd.get('return') === "4xx") {
return data("Returned 400", { status: 400 });
}
return null;
}
let count = 0;
export function loader() {
return { count: ++count };
}
export default function Comp() {
let navigation = useNavigation();
let data = useLoaderData();
return (
<Form method="post">
<button type="submit" name="throw" value="5xx">Throw 5xx</button>
<button type="submit" name="throw" value="4xx">Throw 4xx</button>
<button type="submit" name="return" value="5xx">Return 5xx</button>
<button type="submit" name="return" value="4xx">Return 4xx</button>
<p id="data">{data.count}</p>
{navigation.state === "idle" ? <p id="idle">idle</p> : null}
</Form>
);
}
export function ErrorBoundary() {
return (
<div>
<h1 id="error">Error</h1>
<Link to="/action">Back</Link>
</div>
);
}
`,
},
});
let urls: string[] = [];
page.on("request", (req) => {
if (req.method() === "GET" && req.url().includes(".data")) {
urls.push(req.url());
}
});
console.error = () => {};
let appFixture = await createAppFixture(fixture);
let app = new PlaywrightFixture(appFixture, page);
await app.goto("/action");
expect(await app.getHtml("#data")).toContain("1");
expect(urls).toEqual([]);
await page.click('button[name="return"][value="5xx"]');
await page.waitForSelector("#idle");
expect(await app.getHtml("#data")).toContain("1");
expect(urls).toEqual([]);
await page.click('button[name="return"][value="4xx"]');
await page.waitForSelector("#idle");
expect(await app.getHtml("#data")).toContain("1");
expect(urls).toEqual([]);
await page.click('button[name="throw"][value="5xx"]');
await page.waitForSelector("#error");
expect(urls).toEqual([]);
await app.clickLink("/action");
await page.waitForSelector("#data");
expect(await app.getHtml("#data")).toContain("2");
urls = [];
await page.click('button[name="throw"][value="4xx"]');
await page.waitForSelector("#error");
expect(urls).toEqual([]);
});
test("returns headers correctly for singular loader and action calls", async () => {
let fixture = await createFixture({
files: {
...files,
"app/routes/headers.tsx": js`
export function headers ({ actionHeaders, loaderHeaders, errorHeaders }) {
if (errorHeaders) {
return errorHeaders;
} else if ([...actionHeaders].length > 0) {
return actionHeaders;
} else {
return loaderHeaders;
}
}
export function action({ request }) {
if (new URL(request.url).searchParams.has("error")) {
throw new Response(null, { headers: { "x-action-error": "true" } });
}
return new Response(null, { headers: { "x-action": "true" } });
}
export function loader({ request }) {
if (new URL(request.url).searchParams.has("error")) {
throw new Response(null, { headers: { "x-loader-error": "true" } });
}
return new Response(null, { headers: { "x-loader": "true" } });
}
export default function Comp() {
return null;
}
`,
},
});
// Loader
let docResponse = await fixture.requestDocument("/headers");
let dataResponse = await fixture.requestSingleFetchData("/headers.data");
expect(docResponse.headers.get("x-loader")).toEqual("true");
expect(dataResponse.headers.get("x-loader")).toEqual("true");
// Action
docResponse = await fixture.requestDocument("/headers", {
method: "post",
body: null,
});
dataResponse = await fixture.requestSingleFetchData("/headers.data", {
method: "post",
body: null,
});
expect(docResponse.headers.get("x-action")).toEqual("true");
expect(dataResponse.headers.get("x-action")).toEqual("true");
console.error = () => {};
// Loader Error
docResponse = await fixture.requestDocument("/headers?error");
dataResponse = await fixture.requestSingleFetchData("/headers.data?error");
expect(docResponse.headers.get("x-loader-error")).toEqual("true");
expect(dataResponse.headers.get("x-loader-error")).toEqual("true");
// Action Error
docResponse = await fixture.requestDocument("/headers?error", {
method: "post",
body: null,
});
dataResponse = await fixture.requestSingleFetchData("/headers.data?error", {
method: "post",
body: null,
});
expect(docResponse.headers.get("x-action-error")).toEqual("true");
expect(dataResponse.headers.get("x-action-error")).toEqual("true");
});
test("merges headers from nested routes when raw Responses are returned", async () => {
let fixture = await createFixture({
files: {
...files,
"app/routes/a.tsx": js`
export function headers({ loaderHeaders }) {
return loaderHeaders;
}
export function loader({ request }) {
let headers = new Headers();
headers.set('x-one', 'a set');
headers.set('x-two', 'a set');
return new Response(null, { headers });
}
export default function Comp() {
return null;
}
`,
"app/routes/a.b.tsx": js`
export function headers({ actionHeaders, loaderHeaders, parentHeaders }) {
let h = new Headers();
for (let [name, value] of parentHeaders) {
h.set(name, value);
}
for (let [name, value] of loaderHeaders) {
h.set(name, value);
}
for (let [name, value] of actionHeaders) {
h.set(name, value);
}
return h;
}
export function action({ request }) {
let headers = new Headers();
headers.set('x-two', 'b action set');
return new Response(null, { headers });
}
export function loader({ request }) {
let headers = new Headers();
headers.set('x-two', 'b set');
return new Response(null, { headers });
}
export default function Comp() {
return null;
}
`,
},
});
// x-one uses both set and append
// x-two only uses set
// x-three only uses append
// x-four deletes
let res: Awaited<
ReturnType<
typeof fixture.requestDocument | typeof fixture.requestSingleFetchData
>
>;
res = await fixture.requestDocument("/a");
expect(res.headers.get("x-one")).toEqual("a set");
expect(res.headers.get("x-two")).toEqual("a set");
res = await fixture.requestSingleFetchData("/a.data");
expect(res.headers.get("x-one")).toEqual("a set");
expect(res.headers.get("x-two")).toEqual("a set");
res = await fixture.requestDocument("/a/b");
expect(res.headers.get("x-one")).toEqual("a set");
expect(res.headers.get("x-two")).toEqual("b set");
res = await fixture.requestSingleFetchData("/a/b.data");
expect(res.headers.get("x-one")).toEqual("a set");
expect(res.headers.get("x-two")).toEqual("b set");
// Action only - single fetch request
res = await fixture.requestSingleFetchData("/a/b.data", {
method: "post",
body: null,
});
expect(res.headers.get("x-one")).toEqual(null);
expect(res.headers.get("x-two")).toEqual("b action set");
// Actions and Loaders - Document request
res = await fixture.requestDocument("/a/b", {
method: "post",
body: null,
});
expect(res.headers.get("x-one")).toEqual("a set");
expect(res.headers.get("x-two")).toEqual("b action set");
});
test("merges status codes from nested routes when raw Responses are used", async () => {
let fixture = await createFixture({
files: {
...files,
"app/routes/a.tsx": js`
export function loader({ request }) {
if (new URL(request.url).searchParams.has("error")) {
throw new Response(null, { status: 401 });
} else {
return new Response(null, { status: 201 });
}
}
export default function Comp() {
return null;
}
`,
"app/routes/a.b.tsx": js`
export function loader({ request }) {
return new Response(null, { status: 202 });
}
export default function Comp() {
return null;
}
`,
"app/routes/a.b.c.tsx": js`
export function action({ request }) {
return new Response(null, { status: 206 });
}
export function loader({ request }) {
return new Response(null, { status: 203 });
}
export default function Comp() {
return null;
}
`,
},
});
console.error = () => {};
// Loaders
let res: Awaited<
ReturnType<
typeof fixture.requestDocument | typeof fixture.requestSingleFetchData
>
>;
res = await fixture.requestDocument("/a");
expect(res.status).toEqual(201);
res = await fixture.requestSingleFetchData("/a.data");
expect(res.status).toEqual(201);
res = await fixture.requestDocument("/a/b");
expect(res.status).toEqual(202);
res = await fixture.requestSingleFetchData("/a/b.data");
expect(res.status).toEqual(202);
res = await fixture.requestDocument("/a/b/c");
expect(res.status).toEqual(203);
res = await fixture.requestSingleFetchData("/a/b/c.data");
expect(res.status).toEqual(203);
// Errors
res = await fixture.requestDocument("/a?error");
expect(res.status).toEqual(401);
res = await fixture.requestSingleFetchData("/a.data?error");
expect(res.status).toEqual(401);
res = await fixture.requestDocument("/a/b?error");
expect(res.status).toEqual(401);
res = await fixture.requestSingleFetchData("/a/b.data?error");
expect(res.status).toEqual(401);
// Actions
res = await fixture.requestDocument("/a/b/c", {
method: "post",
body: null,
});
expect(res.status).toEqual(206);
res = await fixture.requestSingleFetchData("/a/b/c.data", {
method: "post",
body: null,
});
expect(res.status).toEqual(206);
});
test("processes thrown loader redirects via Response", async ({ page }) => {
let fixture = await createFixture({
files: {
...files,
"app/routes/data.tsx": js`
import { redirect } from 'react-router';
export function loader() {
throw redirect('/target');
}
export default function Component() {
return null
}
`,
"app/routes/target.tsx": js`
export default function Component() {
return <h1 id="target">Target</h1>
}
`,
},
});
console.error = () => {};
let res = await fixture.requestDocument("/data");
expect(res.status).toBe(302);
expect(res.headers.get("Location")).toBe("/target");
expect(await res.text()).toBe("");
let { status, data } = await fixture.requestSingleFetchData("/data.data");
expect(data).toEqual({
[SingleFetchRedirectSymbol]: {
status: 302,
redirect: "/target",
reload: false,
replace: false,
revalidate: false,
},
});
expect(status).toBe(202);
let appFixture = await createAppFixture(fixture);
let app = new PlaywrightFixture(appFixture, page);
await app.goto("/");
await app.clickLink("/data");
await page.waitForSelector("#target");
expect(await app.getHtml("#target")).toContain("Target");
});
test("processes returned loader redirects via Response", async ({ page }) => {
let fixture = await createFixture({
files: {