fix(napi): return node globalThis from napi_get_global (#17613)

Fixes https://github.com/denoland/deno/issues/17587

test_napi/common.js

@@ -17,5 +17,9 @@ const [libPrefix, libSuffix] = {
 
 export function loadTestLibrary() {
   const specifier = `${targetDir}/${libPrefix}test_napi.${libSuffix}`;
-  return Deno[Deno.internal].core.ops.op_napi_open(specifier); // Internal, used in ext/node
+
+  // Internal, used in ext/node
+  return Deno[Deno.internal].core.ops.op_napi_open(specifier, {
+    Buffer: {},
+  });
 }

test_napi/env_test.js

@@ -0,0 +1,12 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+import { assert, loadTestLibrary } from "./common.js";
+
+const env = loadTestLibrary();
+
+Deno.test("napi get global", function () {
+  const g = env.testNodeGlobal();
+  // Note: global is a mock object in the tests.
+  // See common.js
+  assert(g.Buffer);
+});

test_napi/src/env.rs

@@ -0,0 +1,39 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+use crate::assert_napi_ok;
+use crate::napi_get_callback_info;
+use crate::napi_new_property;
+use napi_sys::*;
+
+extern "C" fn get_node_global(
+  env: napi_env,
+  info: napi_callback_info,
+) -> napi_value {
+  let (_, argc, _) = napi_get_callback_info!(env, info, 0);
+  assert_eq!(argc, 0);
+
+  let mut result: napi_value = std::ptr::null_mut();
+  assert_napi_ok!(napi_get_global(env, &mut result));
+
+  let mut r1: napi_value = std::ptr::null_mut();
+  assert_napi_ok!(napi_get_named_property(
+    env,
+    result,
+    "Buffer\0".as_ptr() as _,
+    &mut r1
+  ));
+
+  result
+}
+
+pub fn init(env: napi_env, exports: napi_value) {
+  let properties =
+    &[napi_new_property!(env, "testNodeGlobal", get_node_global)];
+
+  assert_napi_ok!(napi_define_properties(
+    env,
+    exports,
+    properties.len(),
+    properties.as_ptr()
+  ));
+}

test_napi/src/lib.rs

@@ -12,6 +12,7 @@ pub mod r#async;
 pub mod callback;
 pub mod coerce;
 pub mod date;
+pub mod env;
 pub mod error;
 pub mod mem;
 pub mod numbers;
@@ -143,6 +144,7 @@ unsafe extern "C" fn napi_register_module_v1(
   typedarray::init(env, exports);
   arraybuffer::init(env, exports);
   array::init(env, exports);
+  env::init(env, exports);
   error::init(env, exports);
   primitives::init(env, exports);
   properties::init(env, exports);