src: allow adding linked bindings to Environment

This allows manually adding linked bindings to an `Environment`
instance, without having to register modules at program load in
a global namespace.

PR-URL: https://github.com/nodejs/node/pull/30274
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

1 files changed, 42 insertions, 0 deletions

diff --git a/test/cctest/test_linked_binding.cc b/test/cctest/test_linked_binding.cc
index 9068865552..6724402c55 100644
--- a/test/cctest/test_linked_binding.cc
+++ b/test/cctest/test_linked_binding.cc
@@ -41,3 +41,45 @@ TEST_F(LinkedBindingTest, SimpleTest) {
   CHECK_NOT_NULL(*utf8val);
   CHECK_EQ(strcmp(*utf8val, "value"), 0);
 }
+
+void InitializeLocalBinding(v8::Local<v8::Object> exports,
+                            v8::Local<v8::Value> module,
+                            v8::Local<v8::Context> context,
+                            void* priv) {
+  ++*static_cast<int*>(priv);
+  v8::Isolate* isolate = context->GetIsolate();
+  exports->Set(
+      context,
+      v8::String::NewFromOneByte(isolate,
+                                 reinterpret_cast<const uint8_t*>("key"),
+                                 v8::NewStringType::kNormal).ToLocalChecked(),
+      v8::String::NewFromOneByte(isolate,
+                                 reinterpret_cast<const uint8_t*>("value"),
+                                 v8::NewStringType::kNormal).ToLocalChecked())
+      .FromJust();
+}
+
+TEST_F(LinkedBindingTest, LocallyDefinedLinkedBindingTest) {
+  const v8::HandleScope handle_scope(isolate_);
+  const Argv argv;
+  Env test_env {handle_scope, argv};
+
+  int calls = 0;
+  AddLinkedBinding(*test_env, "local_linked", InitializeLocalBinding, &calls);
+
+  v8::Local<v8::Context> context = isolate_->GetCurrentContext();
+
+  const char* run_script =
+      "process._linkedBinding('local_linked').key";
+  v8::Local<v8::Script> script = v8::Script::Compile(
+      context,
+      v8::String::NewFromOneByte(isolate_,
+                                 reinterpret_cast<const uint8_t*>(run_script),
+                                 v8::NewStringType::kNormal).ToLocalChecked())
+      .ToLocalChecked();
+  v8::Local<v8::Value> completion_value = script->Run(context).ToLocalChecked();
+  v8::String::Utf8Value utf8val(isolate_, completion_value);
+  CHECK_NOT_NULL(*utf8val);
+  CHECK_EQ(strcmp(*utf8val, "value"), 0);
+  CHECK_EQ(calls, 1);
+}