Allow to await non-promise obejct

Author: kateinoigakukun

ext/js/lib/js.rb

@@ -87,7 +87,9 @@ def await
     unless sched
       raise "Please start Ruby evaluation with RubyVM.eval_async to use JS::Object#await"
     end
-    sched.await(self)
+    # Promise.resolve wrap a value or flattens promise-like object and its thenable chain
+    promise = JS.global[:Promise].resolve(self)
+    sched.await(promise)
   end
 end
 

packages/npm-packages/ruby-wasm-wasi/test/unit/test_async.rb

@@ -18,7 +18,7 @@ def test_await_promise_chained
     assert_equal 43, promise.await.to_i
   end
 
-  # def test_await_non_promise
-  #   assert_equal 42, JS.eval("return 42").await.to_i
-  # end
+  def test_await_non_promise
+    assert_equal 42, JS.eval("return 42").await.to_i
+  end
 end