Use the native node:constants module (#10514)

Author: vicb

.changeset/brave-wings-behave.md

@@ -0,0 +1,8 @@
+---
+"@cloudflare/unenv-preset": patch
+---
+
+Use the native `node:constants` module
+
+The native `node:constants` module was implemented in [this PR](https://github.com/cloudflare/workerd/pull/4759)
+It was released as part of workerd [1.20250813.0](https://github.com/cloudflare/workerd/releases/tag/v1.20250813.0)

packages/unenv-preset/src/preset.ts

@@ -6,8 +6,6 @@ import type { Preset } from "unenv";
 // https://developers.cloudflare.com/workers/runtime-apis/nodejs/
 // https://github.com/cloudflare/workerd/tree/main/src/node
 //
-// Last checked: 2025-01-24
-//
 // NOTE: Please sync any changes to `testNodeCompatModules`.
 const nativeModules = [
 	"_stream_duplex",
@@ -21,6 +19,7 @@ const nativeModules = [
 	"assert/strict",
 	"async_hooks",
 	"buffer",
+	"constants",
 	"diagnostics_channel",
 	"dns",
 	"dns/promises",

packages/wrangler/e2e/unenv-preset/worker/index.ts

@@ -107,6 +107,7 @@ export const WorkerdTests: Record<string, () => void> = {
 			"assert/strict",
 			"async_hooks",
 			"buffer",
+			"constants",
 			"diagnostics_channel",
 			"dns",
 			"dns/promises",
@@ -435,4 +436,12 @@ export const WorkerdTests: Record<string, () => void> = {
 		// @ts-expect-error TS2339 Invalid node/types.
 		assert.strictEqual(typeof module._pathCache, "object");
 	},
+
+	async testConstants() {
+		const constants = await import("node:constants");
+
+		assert.deepStrictEqual(constants.O_RDONLY, 0);
+		assert.deepStrictEqual(constants.O_WRONLY, 1);
+		assert.deepStrictEqual(constants.O_RDWR, 2);
+	},
 };