fix(core): module execution with top level await (#7672)

This commit fixes implementation of top level await in "deno_core".

Previously promise returned from module execution was ignored causing to execute
modules out-of-order.

With this commit promise returned from module execution is stored on "JsRuntime"
and event loop is polled until the promise resolves.

6 files changed, 37 insertions, 0 deletions

diff --git a/cli/tests/integration_tests.rs b/cli/tests/integration_tests.rs
index 8e2007b42..9ad7bac8c 100644
--- a/cli/tests/integration_tests.rs
+++ b/cli/tests/integration_tests.rs
@@ -2662,6 +2662,16 @@ itest!(ignore_require {
   exit_code: 0,
 });
 
+itest!(top_level_await_bug {
+  args: "run --allow-read top_level_await_bug.js",
+  output: "top_level_await_bug.out",
+});
+
+itest!(top_level_await_bug2 {
+  args: "run --allow-read top_level_await_bug2.js",
+  output: "top_level_await_bug2.out",
+});
+
 #[test]
 fn cafile_env_fetch() {
   use deno_core::url::Url;
diff --git a/cli/tests/top_level_await_bug.js b/cli/tests/top_level_await_bug.js
new file mode 100644
index 000000000..3c6860a5b
--- /dev/null
+++ b/cli/tests/top_level_await_bug.js
@@ -0,0 +1,2 @@
+const mod = await import("./top_level_await_bug_nested.js");
+console.log(mod);
diff --git a/cli/tests/top_level_await_bug.out b/cli/tests/top_level_await_bug.out
new file mode 100644
index 000000000..f0369645c
--- /dev/null
+++ b/cli/tests/top_level_await_bug.out
@@ -0,0 +1 @@
+Module { default: 1, [Symbol(Symbol.toStringTag)]: "Module" }
diff --git a/cli/tests/top_level_await_bug2.js b/cli/tests/top_level_await_bug2.js
new file mode 100644
index 000000000..c847bbd34
--- /dev/null
+++ b/cli/tests/top_level_await_bug2.js
@@ -0,0 +1,15 @@
+const mod = await import("./top_level_await_bug_nested.js");
+console.log(mod);
+
+const sleep = (n) => new Promise((r) => setTimeout(r, n));
+
+await sleep(100);
+console.log("slept");
+
+window.addEventListener("load", () => {
+  console.log("load event");
+});
+
+setTimeout(() => {
+  console.log("timeout");
+}, 1000);
diff --git a/cli/tests/top_level_await_bug2.out b/cli/tests/top_level_await_bug2.out
new file mode 100644
index 000000000..509ee27c2
--- /dev/null
+++ b/cli/tests/top_level_await_bug2.out
@@ -0,0 +1,4 @@
+Module { default: 1, [Symbol(Symbol.toStringTag)]: "Module" }
+slept
+load event
+timeout
diff --git a/cli/tests/top_level_await_bug_nested.js b/cli/tests/top_level_await_bug_nested.js
new file mode 100644
index 000000000..894f0de2d
--- /dev/null
+++ b/cli/tests/top_level_await_bug_nested.js
@@ -0,0 +1,5 @@
+const sleep = (n) => new Promise((r) => setTimeout(r, n));
+
+await sleep(100);
+
+export default 1;