Bug 1890925 [wpt PR 45660] - Test inserted async script execution ord…

…er, a=testonly Automatic update from web-platform-tests Test inserted async script execution order whatwg/html#9864 discusses the issue. whatwg/html#10272 matches what is tested here. -- wpt-commits: 5adce6fa88ba7bcb5c119d62736fb30cf1273306 wpt-pr: 45660
mozilla · Apr 19, 2024 · 4aa7a77 · 4aa7a77
1 parent e565279
commit 4aa7a77
Showing 1 changed file with 70 additions and 0 deletions.
diff --git a/...html/semantics/scripting-1/the-script-element/module/inline-async-inserted-execorder.html b/...html/semantics/scripting-1/the-script-element/module/inline-async-inserted-execorder.html
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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Inline async="" module scripts execute or throw parse errors asynchronously</title>
+<link rel="help" href="https://github.com/whatwg/html/issues/9864">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<body>
+<script>
+"use strict";
+setup({ allow_uncaught_exception: true });
+
+promise_test(async t => {
+  window.log = ["before any script execution"];
+
+  window.addEventListener("error", ev => {
+    window.log.push("error event on Window");
+  });
+
+  const noErrorScript = document.createElement("script");
+  noErrorScript.type = "module";
+  noErrorScript.async = true;
+  noErrorScript.textContent = "window.log.push('no error script executed');";
+
+  // This should queue a task to run the script, but not run it immediately.
+  document.head.append(noErrorScript);
+
+  log.push("after inserting noErrorScript");
+  assert_array_equals(window.log, [
+    "before any script execution",
+    "after inserting noErrorScript"
+  ]);
+
+  const parseErrorScript = document.createElement("script");
+  parseErrorScript.type = "module";
+  parseErrorScript.async = true;
+  parseErrorScript.textContent = "+++++";
+
+  // This should queue a task to fire the error event, but not fire it immediately.
+  document.head.append(parseErrorScript);
+
+  log.push("after inserting parseErrorScript");
+  assert_array_equals(window.log, [
+    "before any script execution",
+    "after inserting noErrorScript",
+    "after inserting parseErrorScript"
+  ]);
+
+  // After a microtask, the script run / error event must not happen.
+  queueMicrotask(t.step_func(() => {
+    assert_array_equals(window.log, [
+      "before any script execution",
+      "after inserting noErrorScript",
+      "after inserting parseErrorScript"
+    ]);
+  }));
+
+  // But it must eventually happen, after a full task.
+  await t.step_wait(() => window.log.length == 5, "5 items must eventually be logged");
+
+  // And when it does the order must be correct.
+  assert_array_equals(window.log, [
+    "before any script execution",
+    "after inserting noErrorScript",
+    "after inserting parseErrorScript",
+    "no error script executed",
+    "error event on Window"
+  ]);
+});
+</script>