Bug 1479573 [wpt PR 6334] - Add tests for self.queueMicrotask(), a=te…

…stonly

Automatic update from web-platform-testsAdd tests for self.queueMicrotask()

Follows whatwg/html#2789.
--

wpt-commits: 0c3bed38df6d9dcd1441873728fb5c1bb59c92df
wpt-pr: 6334

testing/web-platform/meta/MANIFEST.json

@@ -361560,6 +361560,48 @@
      {}
     ]
    ],
+   "html/webappapis/microtask-queuing/queue-microtask-exceptions.any.js": [
+    [
+     "/html/webappapis/microtask-queuing/queue-microtask-exceptions.any.html",
+     {}
+    ],
+    [
+     "/html/webappapis/microtask-queuing/queue-microtask-exceptions.any.sharedworker.html",
+     {}
+    ],
+    [
+     "/html/webappapis/microtask-queuing/queue-microtask-exceptions.any.worker.html",
+     {}
+    ],
+    [
+     "/html/webappapis/microtask-queuing/queue-microtask-exceptions.https.any.serviceworker.html",
+     {}
+    ]
+   ],
+   "html/webappapis/microtask-queuing/queue-microtask.any.js": [
+    [
+     "/html/webappapis/microtask-queuing/queue-microtask.any.html",
+     {}
+    ],
+    [
+     "/html/webappapis/microtask-queuing/queue-microtask.any.sharedworker.html",
+     {}
+    ],
+    [
+     "/html/webappapis/microtask-queuing/queue-microtask.any.worker.html",
+     {}
+    ],
+    [
+     "/html/webappapis/microtask-queuing/queue-microtask.https.any.serviceworker.html",
+     {}
+    ]
+   ],
+   "html/webappapis/microtask-queuing/queue-microtask.window.js": [
+    [
+     "/html/webappapis/microtask-queuing/queue-microtask.window.html",
+     {}
+    ]
+   ],
    "html/webappapis/scripting/event-loops/microtask_after_raf.html": [
     [
      "/html/webappapis/scripting/event-loops/microtask_after_raf.html",
@@ -600691,6 +600733,18 @@
    "704130abfe91a25e26fc6d452d0981d3dc104642",
    "testharness"
   ],
+  "html/webappapis/microtask-queuing/queue-microtask-exceptions.any.js": [
+   "01f32ac9ba14962fa99d4b263a8ca0f5a0daa161",
+   "testharness"
+  ],
+  "html/webappapis/microtask-queuing/queue-microtask.any.js": [
+   "b39931719a88ad525511d8f8745a9b752a6a6465",
+   "testharness"
+  ],
+  "html/webappapis/microtask-queuing/queue-microtask.window.js": [
+   "78cdcfc5d989a81882a10b7d70050408aadfe924",
+   "testharness"
+  ],
   "html/webappapis/scripting/event-loops/contains.json": [
    "5d7e5e600e90861a1703ae37321b1b2583024d19",
    "support"

testing/web-platform/tests/html/webappapis/microtask-queuing/queue-microtask-exceptions.any.js

@@ -0,0 +1,15 @@
+// META: global=window,worker
+"use strict";
+
+setup({
+  allow_uncaught_exception: true
+});
+
+async_test(t => {
+  const error = new Error("boo");
+  self.addEventListener("error", t.step_func_done(ev => {
+    assert_equals(ev.error, error);
+  }));
+
+  queueMicrotask(() => { throw error; });
+}, "It rethrows exceptions");

testing/web-platform/tests/html/webappapis/microtask-queuing/queue-microtask.any.js

@@ -0,0 +1,39 @@
+// META: global=window,worker
+"use strict";
+
+test(() => {
+  assert_equals(typeof queueMicrotask, "function");
+}, "It exists and is a function");
+
+test(() => {
+  assert_throws(new TypeError(), () => queueMicrotask(), "no argument");
+  assert_throws(new TypeError(), () => queueMicrotask(undefined), "undefined");
+  assert_throws(new TypeError(), () => queueMicrotask(null), "null");
+  assert_throws(new TypeError(), () => queueMicrotask(0), "0");
+  assert_throws(new TypeError(), () => queueMicrotask({ handleEvent() { } }), "an event handler object");
+  assert_throws(new TypeError(), () => queueMicrotask("window.x = 5;"), "a string");
+}, "It throws when given non-functions");
+
+async_test(t => {
+  let called = false;
+  queueMicrotask(t.step_func_done(() => {
+    called = true;
+  }));
+  assert_false(called);
+}, "It calls the callback asynchronously");
+
+async_test(t => {
+  queueMicrotask(t.step_func_done(function () { // note: intentionally not an arrow function
+    assert_array_equals(arguments, []);
+  }), "x", "y");
+}, "It does not pass any arguments");
+
+async_test(t => {
+  const happenings = [];
+  Promise.resolve().then(() => happenings.push("a"));
+  queueMicrotask(() => happenings.push("b"));
+  Promise.reject().catch(() => happenings.push("c"));
+  queueMicrotask(t.step_func_done(() => {
+    assert_array_equals(happenings, ["a", "b", "c"]);
+  }));
+}, "It interleaves with promises as expected");

testing/web-platform/tests/html/webappapis/microtask-queuing/queue-microtask.window.js

@@ -0,0 +1,45 @@
+"use strict";
+
+// This does not work as you expect because mutation observer compound microtasks are confusing.
+// Basically you can only use it once per test.
+function queueMicrotaskViaMO(cb) {
+  const observer = new MutationObserver(cb);
+  const node = document.createTextNode("");
+  observer.observe(node, { characterData: true });
+  node.data = "foo";
+}
+
+// Need to use promise_test to get sequential ordering; otherwise the global mutation observer
+// compound microtask business screws us over.
+
+promise_test(() => {
+  return new Promise(resolve => {
+    const happenings = [];
+
+    queueMicrotaskViaMO(() => happenings.push("x"));
+    queueMicrotask(() => happenings.push("a"));
+
+    queueMicrotask(() => {
+      assert_array_equals(happenings, ["x", "a"]);
+      resolve();
+    });
+  });
+}, "It interleaves with MutationObservers as expected");
+
+promise_test(() => {
+  return new Promise(resolve => {
+    const happenings = [];
+
+    queueMicrotask(() => happenings.push("a"));
+    Promise.reject().catch(() => happenings.push("x"));
+    queueMicrotaskViaMO(() => happenings.push(1));
+    Promise.resolve().then(() => happenings.push("y"));
+    queueMicrotask(() => happenings.push("b"));
+    queueMicrotask(() => happenings.push("c"));
+
+    queueMicrotask(() => {
+      assert_array_equals(happenings, ["a", "x", 1, "y", "b", "c"]);
+      resolve();
+    });
+  });
+}, "It interleaves with MutationObservers and promises together as expected");