[oden-js] Get module exports

oden-js/src/context.rs

@@ -106,6 +106,14 @@ impl ContextRef {
         unsafe { sys::JS_EnableBignumExt(self.ctx, if enable { 1 } else { 0 }) }
     }
 
+    pub fn load_module(&self, input: &str, filename: &str) -> Result<Value> {
+        let val = self.eval(input, filename, EvalType::Module, EvalFlags::COMPILE_ONLY)?;
+        assert!(val.is_module());
+        val.eval_function(self)?;
+
+        Ok(val)
+    }
+
     /// Evaluate the specified JavaScript code.
     pub fn eval(
         &self,
@@ -482,4 +490,23 @@ mod tests {
             .unwrap();
         assert_eq!(String::from("UNSAFE"), result.to_string(&ctx).unwrap());
     }
+
+    #[test]
+    fn modules_with_exports() {
+        let ctx = Context::new(Runtime::new());
+        let module = ctx
+            .load_module("const foo = 123; export { foo };", "main.js")
+            .expect("Could not load!");
+        assert_eq!(module.value_type(), ValueType::Module);
+
+        let foo = module
+            .get_module_export(&ctx, "foo")
+            .expect("Could not get export");
+        assert_eq!(String::from("123"), foo.to_string(&ctx).unwrap());
+
+        let bar = module
+            .get_module_export(&ctx, "bar")
+            .expect("Could not get export");
+        assert!(bar.is_undefined());
+    }
 }