async calls WIP

test/test.js

@@ -2227,4 +2227,18 @@ const y = x()`
     )
   }),
 
+  test_only('async calls', () => {
+    const code = `
+      const fn = () => {
+      }
+      // Use Function constructor to exec impure code for testing
+      new Function('fn', 'globalThis.__run_async_call = fn')(fn)
+    `
+    const i = test_initial_state(code, {
+      on_async_call: (calls) => {console.log('test on async call', calls)}
+    })
+    globalThis.__run_async_call()
+    delete globalThis.__run_async_call
+  }),
+
 ]

test/utils.js

@@ -27,12 +27,15 @@ export const assert_code_error = (codestring, error) => {
   assert_equal(result.error, error)
 }
 
-export const test_initial_state = code => {
-  return get_initial_state({
+export const test_initial_state = (code, state) => {
+  return get_initial_state(
+    {
+      ...state,
       files: typeof(code) == 'object' ? code : { '' : code},
       entrypoint: '',
       current_module: '',
-  })
+    },
+  )
 }
 
 export const stringify = val =>