module: add hook for global preload code

PR-URL: https://github.com/nodejs/node/pull/32068
Reviewed-By: Bradley Farias <bradley.meck@gmail.com>
Reviewed-By: Geoffrey Booth <webmaster@geoffreybooth.com>

2 files changed, 38 insertions, 0 deletions

diff --git a/test/fixtures/es-module-loaders/loader-side-effect-require-preload.js b/test/fixtures/es-module-loaders/loader-side-effect-require-preload.js
new file mode 100644
index 0000000000..98820b9379
--- /dev/null
+++ b/test/fixtures/es-module-loaders/loader-side-effect-require-preload.js
@@ -0,0 +1,6 @@
+/**
+ * This file is combined with `loader-side-effect.mjs` via `--require`. Its
+ * purpose is to test execution order of the two kinds of preload code.
+ */
+
+(globalThis.preloadOrder || (globalThis.preloadOrder = [])).push('--require');
diff --git a/test/fixtures/es-module-loaders/loader-side-effect.mjs b/test/fixtures/es-module-loaders/loader-side-effect.mjs
new file mode 100644
index 0000000000..5c80724fbb
--- /dev/null
+++ b/test/fixtures/es-module-loaders/loader-side-effect.mjs
@@ -0,0 +1,32 @@
+// Arrow function so it closes over the this-value of the preload scope.
+const globalPreload = () => {
+  /* global getBuiltin */
+  const assert = getBuiltin('assert');
+  const vm = getBuiltin('vm');
+
+  assert.strictEqual(typeof require, 'undefined');
+  assert.strictEqual(typeof module, 'undefined');
+  assert.strictEqual(typeof exports, 'undefined');
+  assert.strictEqual(typeof __filename, 'undefined');
+  assert.strictEqual(typeof __dirname, 'undefined');
+
+  assert.strictEqual(this, globalThis);
+  (globalThis.preloadOrder || (globalThis.preloadOrder = [])).push('loader');
+
+  vm.runInThisContext(`\
+var implicitGlobalProperty = 42;
+const implicitGlobalConst = 42 * 42;
+`);
+
+  assert.strictEqual(globalThis.implicitGlobalProperty, 42);
+  (implicitGlobalProperty).foo = 'bar'; // assert: not strict mode
+
+  globalThis.explicitGlobalProperty = 42 * 42 * 42;
+}
+
+export function getGlobalPreloadCode() {
+  return `\
+<!-- assert: inside of script goal -->
+(${globalPreload.toString()})();
+`;
+}