add JS::Object#method_missing as a shorthand

Author: kateinoigakukun

ext/js/js-core.c

@@ -164,7 +164,7 @@ static VALUE _rb_js_global_this(VALUE _) {
  *   JS.global[:console][:log]
  */
 static VALUE _rb_js_obj_aref(VALUE obj, VALUE key) {
-  struct jsvalue *p = check_jsvalue(obj);
+  struct jsvalue *p = check_jsvalue(_rb_js_try_convert(rb_mJS, obj));
   rb_js_abi_host_string_t key_abi_str;
   key = rb_obj_as_string(key);
   rstring_to_abi_string(key, &key_abi_str);

ext/js/lib/js.rb

@@ -0,0 +1,7 @@
+require "js.so"
+
+class JS::Object
+    def method_missing(name, *args)
+        self.call(name, *args)
+    end
+end

packages/npm-packages/ruby-wasm-wasi/test/init.ts

@@ -3,7 +3,7 @@ import path from "path";
 import { DefaultRubyVM } from "../dist/node.cjs";
 
 const rubyModule = (async () => {
-  const binary = await fs.readFile(path.join(__dirname, "./../dist/ruby.wasm"));
+  const binary = await fs.readFile(path.join(__dirname, "./../dist/ruby+stdlib.wasm"));
   return await WebAssembly.compile(binary.buffer);
 })();
 

packages/npm-packages/ruby-wasm-wasi/test/js_from_rb.test.ts

@@ -74,6 +74,19 @@ describe("Manipulation of JS from Ruby", () => {
     expect(vm.eval(inspect_result).toString()).toBe(String(eval(value)));
   });
 
+  test.each([
+    { self: `24`, calee: "toString", args: [], result: "24" },
+    { self: `"hello"`, calee: "charAt", args: [4], result: "o" },
+  ])("JS::Object#method_missing (%s)", async (props) => {
+    const vm = await initRubyVM();
+    const result = `
+    require "js"
+    obj = JS.eval('return ${props.self}')
+    obj.${props.calee}(${props.args.join(", ")})
+    `;
+    expect(vm.eval(result).toString()).toBe(props.result);
+  });
+
   test.each([
     { expr: "JS.global[:Object]", result: Object },
     { expr: "JS.global[:Object][:keys]", result: Object.keys },