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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/webappapis/dynamic-markup-insertion/opening-the-input-stream/tasks.window.html - WPT Dashboard Interop Dashboard
// An older version of the HTML Standard mandated that document.open() remove
// all tasks associated with the document on which open() is called. This step
// has been proposed to be removed. This series of tests ensures that this step
// is no longer executed.
//
// This file comprehensively (but not exhaustively) tests for many queued tasks
// that may be observable. Each taskTest() call in fact runs two tests: the
// first one "tasks without document.open()" does not actually run
// document.open(), just to test that the tested task works ordinarily; the
// second actually calls document.open() to test if the method call removes
// that specific task from the queue.
// This is necessary to allow the promise rejection test below.
setup({
allow_uncaught_exception: true
});
function taskTest(description, testBody) {
async_test(t => {
const frame = document.body.appendChild(document.createElement("iframe"));
// The empty HTML seems to be necessary to cajole Chrome and Safari into
// firing a load event asynchronously, which is necessary to make sure the
// frame's document doesn't have a parser associated with it.
frame.src = "/common/blank.html";
t.add_cleanup(() => frame.remove());
frame.onload = t.step_func(() => {
// Make sure there is no parser. Firefox seems to have an additional
// non-spec-compliant readiness state "uninitialized", so test for the
// two known valid readiness states instead.
assert_in_array(frame.contentDocument.readyState, ["interactive", "complete"]);
testBody(t, frame, doc => {});
});
}, `tasks without document.open() (${description})`);
async_test(t => {
const frame = document.body.appendChild(document.createElement("iframe"));
// The empty HTML seems to be necessary to cajole Chrome into firing a load
// event, which is necessary to make sure the frame's document doesn't have
// a parser associated with it.
frame.src = "/common/blank.html";
t.add_cleanup(() => frame.remove());
frame.onload = t.step_func(() => {
// Make sure there is no parser. Firefox seems to have an additional
// non-spec-compliant readiness state "uninitialized", so test for the
// two known valid readiness states instead.
assert_in_array(frame.contentDocument.readyState, ["interactive", "complete"]);
testBody(t, frame, doc => doc.open());
});
}, `document.open() and tasks (${description})`);
}
taskTest("timeout", (t, frame, open) => {
frame.contentWindow.setTimeout(t.step_func_done(), 100);
open(frame.contentDocument);
});
taskTest("window message", (t, frame, open) => {
let counter = 0;
frame.contentWindow.postMessage(undefined, "*");
open(frame.contentDocument);
frame.contentWindow.postMessage(undefined, "*");
frame.contentWindow.onmessage = t.step_func(e => {
assert_equals(e.data, undefined);
counter++;
assert_less_than_equal(counter, 2);
if (counter == 2) {
t.done();
}
});
});
taskTest("canvas.toBlob()", (t, frame, open) => {
const canvas = frame.contentDocument.body.appendChild(frame.contentDocument.createElement("canvas"));
canvas.toBlob(t.step_func_done());
open(frame.contentDocument);
});
taskTest("MessagePort", (t, frame, open) => {
frame.contentWindow.eval(`({ port1, port2 } = new MessageChannel());`);
frame.contentWindow.port2.onmessage = t.step_func_done(ev => {
assert_equals(ev.data, "Hello world");
});
frame.contentWindow.port1.postMessage("Hello world");
open(frame.contentDocument);
});
taskTest("Promise rejection", (t, frame, open) => {
// There is currently some ambiguity on which Window object the
// unhandledrejection event should be fired on. Here, let's account for that
// ambiguity and allow event fired on _any_ global to pass this test.
// See:
const promise = frame.contentWindow.eval("Promise.reject(42);");
open(frame.contentDocument);
const listener = t.step_func_done(ev => {
assert_equals(ev.promise, promise);
assert_equals(ev.reason, 42);
});
frame.contentWindow.onunhandledrejection = listener;
window.onunhandledrejection = listener;
});