chore: import upstream snapshot with attribution

fixtures/pages-dev-proxy-with-script/_worker.js

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+export default {
+	fetch() {
+		return new Response("hello from _worker.js");
+	},
+};

fixtures/pages-dev-proxy-with-script/custom/script/path/index.js

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+export default {
+	fetch() {
+		return new Response("hello from custom/script/path/index.js");
+	},
+};

fixtures/pages-dev-proxy-with-script/package.json

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+{
+	"name": "@fixture/pages-dev-proxy",
+	"private": true,
+	"sideEffects": false,
+	"scripts": {
+		"dev": "wrangler pages dev public",
+		"test:ci": "vitest run",
+		"test:watch": "vitest",
+		"type:tests": "tsc -p ./tests/tsconfig.json"
+	},
+	"devDependencies": {
+		"@cloudflare/workers-tsconfig": "workspace:*",
+		"@cloudflare/workers-types": "catalog:default",
+		"typescript": "catalog:default",
+		"undici": "catalog:default",
+		"vitest": "catalog:default",
+		"wrangler": "workspace:*"
+	}
+}

fixtures/pages-dev-proxy-with-script/tests/index.test.ts

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+import { ChildProcess, fork } from "node:child_process";
+import path from "node:path";
+import { setTimeout } from "node:timers/promises";
+import { fetch, Response } from "undici";
+import { describe, it, onTestFinished } from "vitest";
+import { runWranglerPagesDev } from "../../shared/src/run-wrangler-long-lived";
+
+describe("Pages dev with proxy and a script file", () => {
+	it("should handle requests using a script from the default _worker.js path", async ({
+		expect,
+	}) => {
+		const process = await startWranglerPagesDevProxy();
+		const combinedResponse = await waitUntilReady(
+			`http://127.0.0.1:${process.port}/`
+		);
+		const respText = await combinedResponse.text();
+		expect(respText).toMatchInlineSnapshot('"hello from _worker.js"');
+		expect(
+			process
+				.getOutput()
+				.includes(
+					"Specifying a `-- <command>` or `--proxy` is deprecated and will be removed in a future version of Wrangler."
+				)
+		).toBeTruthy();
+
+		expect(
+			process
+				.getOutput()
+				.includes(
+					"On Node.js 17+, wrangler will default to fetching only the IPv6 address. Please ensure that the process listening on the port specified via `--proxy` is configured for IPv6."
+				)
+		).toBeTruthy();
+	});
+
+	it("should handle requests using a script from a custom script path", async ({
+		expect,
+	}) => {
+		const process = await startWranglerPagesDevProxy([
+			"--script-path=custom/script/path/index.js",
+		]);
+		const combinedResponse = await waitUntilReady(
+			`http://127.0.0.1:${process.port}/`
+		);
+		const respText = await combinedResponse.text();
+		expect(respText).toMatchInlineSnapshot(
+			'"hello from custom/script/path/index.js"'
+		);
+	});
+});
+
+async function startWranglerPagesDevProxy(extraArgs: string[] = []) {
+	const process = await runWranglerPagesDev(
+		path.resolve(__dirname, ".."),
+		undefined,
+		["--port=0", "--proxy=9999", ...extraArgs]
+	);
+
+	onTestFinished(process.stop);
+
+	return process;
+}
+
+async function waitUntilReady(url: string): Promise<Response> {
+	let response: Response | undefined = undefined;
+
+	while (response === undefined) {
+		await setTimeout(500);
+
+		try {
+			response = await fetch(url);
+		} catch (e) {}
+	}
+
+	return response as Response;
+}

fixtures/pages-dev-proxy-with-script/tests/tsconfig.json

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+{
+	"extends": "@cloudflare/workers-tsconfig/tsconfig.json",
+	"compilerOptions": {
+		"types": ["node"]
+	},
+	"include": ["**/*.ts"]
+}

fixtures/pages-dev-proxy-with-script/tsconfig.json

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+{
+	"include": ["index.d.ts"],
+	"compilerOptions": {
+		"target": "ES2020",
+		"module": "preserve",
+		"lib": ["ES2020"],
+		"types": ["@cloudflare/workers-types"],
+		"moduleResolution": "node",
+		"noEmit": true,
+		"skipLibCheck": true
+	}
+}

fixtures/pages-dev-proxy-with-script/vitest.config.mts

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