chore: import upstream snapshot with attribution

fixtures/node-env/package.json

@@ -0,0 +1,25 @@
+{
+	"name": "@fixture/node-env",
+	"private": true,
+	"scripts": {
+		"check:type": "tsc",
+		"dev": "wrangler dev",
+		"test:ci": "vitest run",
+		"test:watch": "vitest"
+	},
+	"dependencies": {
+		"react": "^18.3.1",
+		"react-dom": "^18.3.1"
+	},
+	"devDependencies": {
+		"@cloudflare/workers-tsconfig": "workspace:*",
+		"@cloudflare/workers-types": "catalog:default",
+		"@types/node": "catalog:default",
+		"@types/react": "^18.3.3",
+		"@types/react-dom": "^18.2.0",
+		"miniflare": "workspace:*",
+		"typescript": "catalog:default",
+		"vitest": "catalog:default",
+		"wrangler": "workspace:*"
+	}
+}

fixtures/node-env/src/index.ts

@@ -0,0 +1,20 @@
+import React from "react";
+import { renderToString } from "react-dom/server";
+
+export default {
+	async fetch(request) {
+		const url = new URL(request.url);
+
+		if (url.pathname === "/ssr") {
+			const content = renderToString(
+				React.createElement("h1", null, "Hello world")
+			);
+
+			return new Response(content);
+		}
+
+		return new Response(
+			`The value of process.env.NODE_ENV is "${process.env.NODE_ENV}"`
+		);
+	},
+} satisfies ExportedHandler;

fixtures/node-env/tests/node-env.test.ts

@@ -0,0 +1,137 @@
+import { spawnSync } from "node:child_process";
+import * as fs from "node:fs";
+import * as path from "node:path";
+import { Miniflare } from "miniflare";
+import { describe, it, vi } from "vitest";
+import { runWranglerDev } from "../../shared/src/run-wrangler-long-lived";
+
+describe("`process.env.NODE_ENV` replacement in development", () => {
+	it("replaces `process.env.NODE_ENV` with `development` if it is `undefined`", async ({
+		expect,
+	}) => {
+		vi.stubEnv("NODE_ENV", undefined);
+
+		const { ip, port, stop } = await runWranglerDev(
+			path.resolve(__dirname, ".."),
+			["--port=0", "--inspector-port=0"]
+		);
+
+		await vi.waitFor(async () => {
+			const response = await fetch(`http://${ip}:${port}/`);
+			const text = await response.text();
+			expect(text).toBe(`The value of process.env.NODE_ENV is "development"`);
+		});
+
+		await stop();
+
+		vi.unstubAllEnvs();
+	});
+
+	it("replaces `process.env.NODE_ENV` with the given value if it is set", async ({
+		expect,
+	}) => {
+		vi.stubEnv("NODE_ENV", "some-value");
+
+		const { ip, port, stop } = await runWranglerDev(
+			path.resolve(__dirname, ".."),
+			["--port=0", "--inspector-port=0"]
+		);
+
+		await vi.waitFor(async () => {
+			const response = await fetch(`http://${ip}:${port}/`);
+			const text = await response.text();
+			expect(text).toBe(`The value of process.env.NODE_ENV is "some-value"`);
+		});
+
+		await stop();
+
+		vi.unstubAllEnvs();
+	});
+});
+
+describe("`process.env.NODE_ENV` replacement in production", () => {
+	const url = "http://localhost";
+
+	it("replaces `process.env.NODE_ENV` with `production` if it is `undefined`", async ({
+		expect,
+	}) => {
+		vi.stubEnv("NODE_ENV", undefined);
+
+		spawnSync("npx wrangler build", {
+			shell: true,
+			stdio: "pipe",
+		});
+
+		const miniflare = new Miniflare({
+			modules: [
+				{
+					type: "ESModule",
+					path: "./dist/index.js",
+				},
+			],
+		});
+
+		await miniflare.ready;
+
+		await vi.waitFor(async () => {
+			const response = await miniflare.dispatchFetch(url);
+			const text = await response.text();
+			expect(text).toBe(`The value of process.env.NODE_ENV is "production"`);
+		});
+
+		await miniflare.dispose();
+
+		vi.unstubAllEnvs();
+	});
+
+	it("replaces `process.env.NODE_ENV` with the given value if it is set", async ({
+		expect,
+	}) => {
+		vi.stubEnv("NODE_ENV", "some-value");
+
+		spawnSync("npx wrangler build", {
+			shell: true,
+			stdio: "pipe",
+		});
+
+		const miniflare = new Miniflare({
+			modules: [
+				{
+					type: "ESModule",
+					path: "./dist/index.js",
+				},
+			],
+		});
+
+		await miniflare.ready;
+
+		await vi.waitFor(async () => {
+			const response = await miniflare.dispatchFetch(url);
+			const text = await response.text();
+			expect(text).toBe(`The value of process.env.NODE_ENV is "some-value"`);
+		});
+
+		await miniflare.dispose();
+
+		vi.unstubAllEnvs();
+	});
+
+	it("tree shakes React when `process.env.NODE_ENV` is `production`", ({
+		expect,
+	}) => {
+		vi.stubEnv("NODE_ENV", undefined);
+
+		spawnSync("npx wrangler build", {
+			shell: true,
+			stdio: "pipe",
+		});
+
+		const outputJs = fs.readFileSync("./dist/index.js", "utf8");
+
+		expect(outputJs).not.toContain("react-dom.development.js");
+		// the React development code links to the facebook/react repo
+		expect(outputJs).not.toContain("https://github.com/facebook/react");
+
+		vi.unstubAllEnvs();
+	});
+});

fixtures/node-env/tsconfig.json

@@ -0,0 +1,7 @@
+{
+	"extends": "@cloudflare/workers-tsconfig/tsconfig.json",
+	"compilerOptions": {
+		"types": ["@cloudflare/workers-types/experimental", "node"]
+	},
+	"include": ["src", "tests"]
+}

fixtures/node-env/vitest.config.mts

@@ -0,0 +1,9 @@
+import { defineProject, mergeConfig } from "vitest/config";
+import configShared from "../../vitest.shared";
+
+export default mergeConfig(
+	configShared,
+	defineProject({
+		test: {},
+	})
+);

fixtures/node-env/wrangler.jsonc

@@ -0,0 +1,5 @@
+{
+	"name": "node-env",
+	"compatibility_date": "2025-10-01",
+	"main": "./src/index.ts",
+}