Eval async code as top level code

Author: kateinoigakukun

ext/js/lib/js.rb

@@ -67,7 +67,11 @@ def self.__eval_async_rb(rb_code, future)
     Fiber
       .new do
         future.resolve JS::Object.wrap(
-                         Kernel.eval(rb_code.to_s, nil, "eval_async")
+                         Kernel.eval(
+                           rb_code.to_s,
+                           TOPLEVEL_BINDING,
+                           "eval_async"
+                         )
                        )
       rescue => e
         future.reject JS::Object.wrap(e)

packages/npm-packages/ruby-wasm-wasi/tools/run-test-unit.mjs

@@ -53,8 +53,7 @@ const main = async () => {
 
   Error.stackTraceLimit = Infinity;
 
-  // FIXME: require 'test/unit' fails with evalAsync due to Kernel#eval (?)
-  vm.eval(`
+  await vm.evalAsync(`
     # HACK: Until we've fixed the issue in the test-unit or power_assert
     # See https://github.com/test-unit/test-unit/pull/221
     module Kernel
@@ -69,8 +68,6 @@ const main = async () => {
     end
 
     require 'test/unit'
-  `);
-  await vm.evalAsync(`
     require_relative '${rootTestFile}'
     Test::Unit::AutoRunner.run
   `);