81 lines
3.0 KiB
JavaScript
81 lines
3.0 KiB
JavaScript
/* Any copyright is dedicated to the Public Domain.
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http://creativecommons.org/publicdomain/zero/1.0/ */
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"use strict";
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Services.scriptloader.loadSubScript(
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"chrome://mochitests/content/browser/devtools/server/tests/browser/inspector-helpers.js",
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this
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);
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// Get a hold of a node, remove it from the doc and retain it at the same time.
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// We should always win that race (even though the mutation happens before the
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// retain request), because we haven't issued `getMutations` yet.
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add_task(async function testWinRace() {
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const { walker } = await initInspectorFront(
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MAIN_DOMAIN + "inspector-traversal-data.html"
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);
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const front = await walker.querySelector(walker.rootNode, "#a");
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const onMutation = waitForMutation(walker, isChildList);
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SpecialPowers.spawn(gBrowser.selectedBrowser, [], function () {
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const contentNode = content.document.querySelector("#a");
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contentNode.remove();
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});
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// Now wait for that mutation and retain response to come in.
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await walker.retainNode(front);
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await onMutation;
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await assertOwnershipTrees(walker);
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is(walker._retainedOrphans.size, 1, "Should have a retained orphan.");
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ok(
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walker._retainedOrphans.has(front),
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"Should have retained our expected node."
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);
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await walker.unretainNode(front);
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// Make sure we're clear for the next test.
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await assertOwnershipTrees(walker);
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is(walker._retainedOrphans.size, 0, "Should have no more retained orphans.");
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});
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// Same as above, but issue the request right after the 'new-mutations' event, so that
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// we *lose* the race.
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add_task(async function testLoseRace() {
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const { walker } = await initInspectorFront(
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MAIN_DOMAIN + "inspector-traversal-data.html"
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);
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const front = await walker.querySelector(walker.rootNode, "#z");
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const onMutation = walker.once("new-mutations");
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await SpecialPowers.spawn(gBrowser.selectedBrowser, [], function () {
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const contentNode = content.document.querySelector("#z");
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contentNode.remove();
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});
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await onMutation;
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// Verify that we have an outstanding request (no good way to tell that it's a
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// getMutations request, but there's nothing else it would be).
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is(walker._requests.length, 1, "Should have an outstanding request.");
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try {
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await walker.retainNode(front);
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ok(false, "Request should not have succeeded!");
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} catch (err) {
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// XXX: Switched to from ok() to todo_is() in Bug 1467712. Follow up in
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// 1500960
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// This is throwing because of
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// `gInspectee.querySelector("#z").parentNode = null;` two blocks above...
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// Even if you fix that, the test is still failing because "#a" was removed
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// by the previous test. I am switching this to "#z" because I think that
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// was the original intent. Still not failing with the expected error message
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// Needs more work.
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// ok(err, "noSuchActor", "Should have lost the race.");
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is(
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walker._retainedOrphans.size,
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0,
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"Should have no more retained orphans."
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);
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// Don't re-throw the error.
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}
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});
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