10 files changed, 874 insertions, 0 deletions
diff --git a/accessible/tests/browser/tree/browser.ini b/accessible/tests/browser/tree/browser.ini
new file mode 100644
index 0000000000..bb4aedd149
--- /dev/null
+++ b/accessible/tests/browser/tree/browser.ini
@@ -0,0 +1,19 @@
+[DEFAULT]
+subsuite = a11y
+support-files =
+  head.js
+  !/accessible/tests/browser/shared-head.js
+  !/accessible/tests/mochitest/*.js
+  !/accessible/tests/browser/*.jsm
+prefs =
+  javascript.options.asyncstack_capture_debuggee_only=false
+
+[browser_aria_owns.js]
+skip-if = true || (verify && !debug && (os == 'linux')) #Bug 1445513
+[browser_browser_element.js]
+[browser_css_content_visibility.js]
+[browser_general.js]
+[browser_lazy_tabs.js]
+[browser_searchbar.js]
+[browser_shadowdom.js]
+[browser_test_nsIAccessibleDocument_URL.js]
diff --git a/accessible/tests/browser/tree/browser_aria_owns.js b/accessible/tests/browser/tree/browser_aria_owns.js
new file mode 100644
index 0000000000..0ca55ed357
--- /dev/null
+++ b/accessible/tests/browser/tree/browser_aria_owns.js
@@ -0,0 +1,278 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+let NO_MOVE = { unexpected: [[EVENT_REORDER, "container"]] };
+let MOVE = { expected: [[EVENT_REORDER, "container"]] };
+
+// Set last ordinal child as aria-owned, should produce no reorder.
+addAccessibleTask(
+  `<ul id="container"><li id="a">Test</li></ul>`,
+  async function (browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc, ["a"]);
+
+    await contentSpawnMutation(browser, NO_MOVE, function () {
+      // aria-own ordinal child in place, should be a no-op.
+      content.document
+        .getElementById("container")
+        .setAttribute("aria-owns", "a");
+    });
+
+    testChildrenIds(containerAcc, ["a"]);
+  }
+);
+
+// Add a new ordinal child to a container with an aria-owned child.
+// Order should respect aria-owns.
+addAccessibleTask(
+  `<ul id="container"><li id="a">Test</li></ul>`,
+  async function (browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc, ["a"]);
+
+    await contentSpawnMutation(browser, MOVE, function () {
+      let container = content.document.getElementById("container");
+      container.setAttribute("aria-owns", "a");
+
+      let aa = content.document.createElement("li");
+      aa.id = "aa";
+      container.appendChild(aa);
+    });
+
+    testChildrenIds(containerAcc, ["aa", "a"]);
+
+    await contentSpawnMutation(browser, MOVE, function () {
+      content.document.getElementById("container").removeAttribute("aria-owns");
+    });
+
+    testChildrenIds(containerAcc, ["a", "aa"]);
+  }
+);
+
+// Remove a no-move aria-owns attribute, should result in a no-move.
+addAccessibleTask(
+  `<ul id="container" aria-owns="a"><li id="a">Test</li></ul>`,
+  async function (browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc, ["a"]);
+
+    await contentSpawnMutation(browser, NO_MOVE, function () {
+      // remove aria-owned child that is already ordinal, should be no-op.
+      content.document.getElementById("container").removeAttribute("aria-owns");
+    });
+
+    testChildrenIds(containerAcc, ["a"]);
+  }
+);
+
+// Attempt to steal an aria-owned child. The attempt should fail.
+addAccessibleTask(
+  `
+  <ul>
+    <li id="a">Test</li>
+  </ul>
+  <ul aria-owns="a"></ul>
+  <ul id="container"></ul>`,
+  async function (browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc, []);
+
+    await contentSpawnMutation(browser, NO_MOVE, function () {
+      content.document
+        .getElementById("container")
+        .setAttribute("aria-owns", "a");
+    });
+
+    testChildrenIds(containerAcc, []);
+  }
+);
+
+// Don't aria-own children of <select>
+addAccessibleTask(
+  `
+  <div id="container" role="group" aria-owns="b"></div>
+  <select id="select">
+    <option id="a"></option>
+    <option id="b"></option>
+  </select>`,
+  async function (browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+    let selectAcc = findAccessibleChildByID(accDoc, "select");
+
+    testChildrenIds(containerAcc, []);
+    testChildrenIds(selectAcc.firstChild, ["a", "b"]);
+  }
+);
+
+// Don't allow <select> to aria-own
+addAccessibleTask(
+  `
+  <div id="container" role="group">
+    <div id="a"></div>
+    <div id="b"></div>
+  </div>
+  <select id="select" aria-owns="a">
+    <option id="c"></option>
+  </select>`,
+  async function (browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+    let selectAcc = findAccessibleChildByID(accDoc, "select");
+
+    testChildrenIds(containerAcc, ["a", "b"]);
+    testChildrenIds(selectAcc.firstChild, ["c"]);
+  }
+);
+
+// Don't allow one <select> to aria-own an <option> from another <select>.
+addAccessibleTask(
+  `
+  <select id="select1" aria-owns="c">
+    <option id="a"></option>
+    <option id="b"></option>
+  </select>
+  <select id="select2">
+    <option id="c"></option>
+  </select>`,
+  async function (browser, accDoc) {
+    let selectAcc1 = findAccessibleChildByID(accDoc, "select1");
+    let selectAcc2 = findAccessibleChildByID(accDoc, "select2");
+
+    testChildrenIds(selectAcc1.firstChild, ["a", "b"]);
+    testChildrenIds(selectAcc2.firstChild, ["c"]);
+  }
+);
+
+// Don't allow a <select> to reorder its children with aria-owns.
+addAccessibleTask(
+  `
+  <select id="container" aria-owns="c b a">
+    <option id="a"></option>
+    <option id="b"></option>
+    <option id="c"></option>
+  </select>`,
+  async function (browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc.firstChild, ["a", "b", "c"]);
+
+    await contentSpawnMutation(browser, NO_MOVE, function () {
+      content.document
+        .getElementById("container")
+        .setAttribute("aria-owns", "a c b");
+    });
+
+    testChildrenIds(containerAcc.firstChild, ["a", "b", "c"]);
+  }
+);
+
+// Don't crash if ID in aria-owns does not exist
+addAccessibleTask(
+  `
+  <select id="container" aria-owns="boom" multiple></select>`,
+  async function (browser, accDoc) {
+    ok(true, "Did not crash");
+  }
+);
+
+addAccessibleTask(
+  `
+  <ul id="one">
+    <li id="a">Test</li>
+    <li id="b">Test 2</li>
+    <li id="c">Test 3</li>
+  </ul>
+  <ul id="two"></ul>`,
+  async function (browser, accDoc) {
+    let one = findAccessibleChildByID(accDoc, "one");
+    let two = findAccessibleChildByID(accDoc, "two");
+
+    let waitfor = {
+      expected: [
+        [EVENT_REORDER, "one"],
+        [EVENT_REORDER, "two"],
+      ],
+    };
+
+    await contentSpawnMutation(browser, waitfor, function () {
+      // Put same id twice in aria-owns
+      content.document.getElementById("two").setAttribute("aria-owns", "a a");
+    });
+
+    testChildrenIds(one, ["b", "c"]);
+    testChildrenIds(two, ["a"]);
+
+    await contentSpawnMutation(browser, waitfor, function () {
+      // If the previous double-id aria-owns worked correctly, we should
+      // be in a good state and all is fine..
+      content.document.getElementById("two").setAttribute("aria-owns", "a b");
+    });
+
+    testChildrenIds(one, ["c"]);
+    testChildrenIds(two, ["a", "b"]);
+  }
+);
+
+addAccessibleTask(
+  `<div id="a"></div><div id="b"></div>`,
+  async function (browser, accDoc) {
+    testChildrenIds(accDoc, ["a", "b"]);
+
+    let waitFor = {
+      expected: [[EVENT_REORDER, e => e.accessible == accDoc]],
+    };
+
+    await contentSpawnMutation(browser, waitFor, function () {
+      content.document.documentElement.style.display = "none";
+      content.document.documentElement.getBoundingClientRect();
+      content.document.body.setAttribute("aria-owns", "b a");
+      content.document.documentElement.remove();
+    });
+
+    testChildrenIds(accDoc, []);
+  }
+);
+
+// Don't allow ordinal child to be placed after aria-owned child (bug 1405796)
+addAccessibleTask(
+  `<div id="container"><div id="a">Hello</div></div>
+                   <div><div id="c">There</div><div id="d">There</div></div>`,
+  async function (browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc, ["a"]);
+
+    await contentSpawnMutation(browser, MOVE, function () {
+      content.document
+        .getElementById("container")
+        .setAttribute("aria-owns", "c");
+    });
+
+    testChildrenIds(containerAcc, ["a", "c"]);
+
+    await contentSpawnMutation(browser, MOVE, function () {
+      let span = content.document.createElement("span");
+      content.document.getElementById("container").appendChild(span);
+
+      let b = content.document.createElement("div");
+      b.id = "b";
+      content.document.getElementById("container").appendChild(b);
+    });
+
+    testChildrenIds(containerAcc, ["a", "b", "c"]);
+
+    await contentSpawnMutation(browser, MOVE, function () {
+      content.document
+        .getElementById("container")
+        .setAttribute("aria-owns", "c d");
+    });
+
+    testChildrenIds(containerAcc, ["a", "b", "c", "d"]);
+  }
+);
diff --git a/accessible/tests/browser/tree/browser_browser_element.js b/accessible/tests/browser/tree/browser_browser_element.js
new file mode 100644
index 0000000000..82be24d93c
--- /dev/null
+++ b/accessible/tests/browser/tree/browser_browser_element.js
@@ -0,0 +1,16 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+// Test that the tree is correct for browser elements containing remote
+// documents.
+addAccessibleTask(`test`, async function (browser, docAcc) {
+  // testAccessibleTree also verifies childCount, indexInParent and parent.
+  testAccessibleTree(browser, {
+    INTERNAL_FRAME: [{ DOCUMENT: [{ TEXT_LEAF: [] }] }],
+  });
+});
diff --git a/accessible/tests/browser/tree/browser_css_content_visibility.js b/accessible/tests/browser/tree/browser_css_content_visibility.js
new file mode 100644
index 0000000000..798e409d86
--- /dev/null
+++ b/accessible/tests/browser/tree/browser_css_content_visibility.js
@@ -0,0 +1,121 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+const snippet1 = `
+  <style>
+  #container {
+    width: 150px;
+    height: 150px;
+    background: lightblue;
+  }
+  .hidden {
+    content-visibility: hidden;
+  }
+  .auto {
+    content-visibility: auto;
+  }
+  </style>
+  <div id="container">
+    <div class="hidden" id="hidden-target">
+      hidden target
+      <div id="hidden-child">
+        hidden child
+      </div>
+    </div>
+    <div class="auto" id="auto-target">
+      auto target
+      <div id="auto-child">
+        auto child
+      </div>
+    </div>
+  </div>
+  `;
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [["layout.css.content-visibility.enabled", true]],
+  });
+});
+
+// Check if the element specified with `content-visibility` property is accessible
+addAccessibleTask(
+  snippet1,
+  async function (browser, accDoc) {
+    const container = findAccessibleChildByID(accDoc, "container");
+    ok(
+      findAccessibleChildByID(container, "hidden-target"),
+      "hidden-target is accessible"
+    );
+    ok(
+      findAccessibleChildByID(container, "auto-target"),
+      "auto-target is accessible"
+    );
+
+    // The test checks if the child element of the element specified with
+    // `content-visibility: hidden` is ignored from a11y tree
+    let target = findAccessibleChildByID(accDoc, "hidden-target");
+    ok(
+      !findAccessibleChildByID(target, "hidden-child"),
+      "Children of hidden-target is not accessible"
+    );
+
+    // The test checks if the child element of the element specified with
+    // `content-visibility: auto` is showen in a11y tree
+    target = findAccessibleChildByID(accDoc, "auto-target");
+    ok(
+      findAccessibleChildByID(target, "auto-child"),
+      "Children of auto-target is accessible"
+    );
+  },
+  { iframe: true, remoteIframe: true, chrome: true }
+);
+
+// Check if the element having `display: contents` and a child of `content-visibility: hidden` element isn't accessible
+const snippet2 = `
+  <style>
+  #target {
+    width: 150px;
+    height: 150px;
+    background-color: lightblue;
+  }
+  #child {
+    width: 100px;
+    height: 100px;
+    background-color: lightgreen;
+  }
+  #grandchild {
+    width: 50px;
+    height: 50px;
+    background-color: red;
+  }
+  .hidden {
+    content-visibility: hidden;
+  }
+  .display-contents {
+    display: contents;
+  }
+  </style>
+  <div id="target" class="hidden">
+    <div id="child" class="display-contents">
+      <div id="grandchild"></div>
+    </div>
+  </div>
+  `;
+
+addAccessibleTask(
+  snippet2,
+  async function (browser, accDoc) {
+    const target = findAccessibleChildByID(accDoc, "target");
+    ok(
+      !findAccessibleChildByID(target, "child"),
+      "Element having `display: contents` and a child of `content-visibility: hidden` element isn't accessible"
+    );
+    testAccessibleTree(target, { SECTION: [] });
+  },
+  { iframe: true, remoteIframe: true, chrome: true }
+);
diff --git a/accessible/tests/browser/tree/browser_general.js b/accessible/tests/browser/tree/browser_general.js
new file mode 100644
index 0000000000..0d16271a36
--- /dev/null
+++ b/accessible/tests/browser/tree/browser_general.js
@@ -0,0 +1,128 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+/**
+ * Verify adding `overflow:hidden;` styling to a div causes it to
+ * get an accessible.
+ */
+addAccessibleTask(`<p>hello world</p>`, async function (browser, docAcc) {
+  const originalTree = { DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }] };
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding div element");
+  await contentSpawnMutation(
+    browser,
+    { unexpected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      const d = content.document.createElement("div");
+      content.document.body.appendChild(d);
+    }
+  );
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding overflow:hidden styling to div");
+  await contentSpawnMutation(
+    browser,
+    { expected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      content.document.body.lastElementChild.setAttribute(
+        "style",
+        "overflow:hidden;"
+      );
+    }
+  );
+
+  testAccessibleTree(docAcc, {
+    DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }, { TEXT_CONTAINER: [] }],
+  });
+});
+
+/**
+ * Verify adding `overflow:scroll;` styling to a div causes
+ * it to  get an accessible.
+ */
+addAccessibleTask(`<p>hello world</p>`, async function (browser, docAcc) {
+  const originalTree = { DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }] };
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding div element");
+  await contentSpawnMutation(
+    browser,
+    { unexpected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      const d = content.document.createElement("div");
+      content.document.body.appendChild(d);
+    }
+  );
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding overflow:scroll styling to div");
+  await contentSpawnMutation(
+    browser,
+    { expected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      content.document.body.lastElementChild.setAttribute(
+        "style",
+        "overflow:scroll;"
+      );
+    }
+  );
+
+  testAccessibleTree(docAcc, {
+    DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }, { TEXT_CONTAINER: [] }],
+  });
+});
+
+/**
+ * Verify adding `overflow:auto;` styling to a div causes
+ * it to get an accessible, but `overflow:visible` does not.
+ */
+addAccessibleTask(`<p>hello world</p>`, async function (browser, docAcc) {
+  const originalTree = { DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }] };
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding div element");
+  await contentSpawnMutation(
+    browser,
+    { unexpected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      const d = content.document.createElement("div");
+      content.document.body.appendChild(d);
+    }
+  );
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding overflow:visible styling to div");
+  await contentSpawnMutation(
+    browser,
+    { unexpected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      content.document.body.lastElementChild.setAttribute(
+        "style",
+        "overflow:visible;"
+      );
+    }
+  );
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding overflow:auto styling to div");
+  await contentSpawnMutation(
+    browser,
+    { expected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      content.document.body.lastElementChild.setAttribute(
+        "style",
+        "overflow:auto;"
+      );
+    }
+  );
+
+  testAccessibleTree(docAcc, {
+    DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }, { TEXT_CONTAINER: [] }],
+  });
+});
diff --git a/accessible/tests/browser/tree/browser_lazy_tabs.js b/accessible/tests/browser/tree/browser_lazy_tabs.js
new file mode 100644
index 0000000000..f7aa9bdeb2
--- /dev/null
+++ b/accessible/tests/browser/tree/browser_lazy_tabs.js
@@ -0,0 +1,43 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that lazy background tabs aren't unintentionally loaded when building
+// the a11y tree (bug 1700708).
+addAccessibleTask(``, async function (browser, accDoc) {
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.sessionstore.restore_on_demand", true]],
+  });
+
+  info("Opening a new window");
+  let win = await BrowserTestUtils.openNewBrowserWindow();
+  // Window is opened with a blank tab.
+  info("Loading second tab");
+  await BrowserTestUtils.openNewForegroundTab({
+    gBrowser: win.gBrowser,
+    url: "data:text/html,2",
+  });
+  info("Loading third tab");
+  await BrowserTestUtils.openNewForegroundTab({
+    gBrowser: win.gBrowser,
+    url: "data:text/html,3",
+  });
+  info("Closing the window");
+  await BrowserTestUtils.closeWindow(win);
+
+  is(SessionStore.getClosedWindowCount(), 1, "Should have a window to restore");
+  info("Restoring the window");
+  win = SessionStore.undoCloseWindow(0);
+  await BrowserTestUtils.waitForEvent(win, "SSWindowStateReady");
+  await BrowserTestUtils.waitForEvent(
+    win.gBrowser.tabContainer,
+    "SSTabRestored"
+  );
+  is(win.gBrowser.tabs.length, 3, "3 tabs restored");
+  ok(win.gBrowser.tabs[2].selected, "Third tab selected");
+  ok(getAccessible(win.gBrowser.tabs[1]), "Second tab has accessible");
+  ok(!win.gBrowser.browsers[1].isConnected, "Second tab is lazy");
+  info("Closing the restored window");
+  await BrowserTestUtils.closeWindow(win);
+});
diff --git a/accessible/tests/browser/tree/browser_searchbar.js b/accessible/tests/browser/tree/browser_searchbar.js
new file mode 100644
index 0000000000..ef68307b91
--- /dev/null
+++ b/accessible/tests/browser/tree/browser_searchbar.js
@@ -0,0 +1,84 @@
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+// eslint-disable-next-line camelcase
+add_task(async function test_searchbar_a11y_tree() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.search.widget.inNavBar", true]],
+  });
+
+  // This used to rely on the implied 100ms initial timer of
+  // TestUtils.waitForCondition. See bug 1700735.
+  // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+  await new Promise(resolve => setTimeout(resolve, 100));
+  let searchbar = await TestUtils.waitForCondition(
+    () => document.getElementById("searchbar"),
+    "wait for search bar to appear"
+  );
+
+  // Make sure the popup has been rendered so it shows up in the a11y tree.
+  let popup = document.getElementById("PopupSearchAutoComplete");
+  let promise = Promise.all([
+    BrowserTestUtils.waitForEvent(popup, "popupshown", false),
+    waitForEvent(EVENT_SHOW, popup),
+  ]);
+  searchbar.textbox.openPopup();
+  await promise;
+
+  let TREE = {
+    role: ROLE_EDITCOMBOBOX,
+
+    children: [
+      // input element
+      {
+        role: ROLE_ENTRY,
+        children: [],
+      },
+
+      // context menu
+      {
+        role: ROLE_COMBOBOX_LIST,
+        children: [],
+      },
+
+      // result list
+      {
+        role: ROLE_GROUPING,
+        // not testing the structure inside the result list
+      },
+    ],
+  };
+
+  testAccessibleTree(searchbar, TREE);
+
+  promise = Promise.all([
+    BrowserTestUtils.waitForEvent(popup, "popuphidden", false),
+    waitForEvent(EVENT_HIDE, popup),
+  ]);
+  searchbar.textbox.closePopup();
+  await promise;
+
+  TREE = {
+    role: ROLE_EDITCOMBOBOX,
+
+    children: [
+      // input element
+      {
+        role: ROLE_ENTRY,
+        children: [],
+      },
+
+      // context menu
+      {
+        role: ROLE_COMBOBOX_LIST,
+        children: [],
+      },
+
+      // the result list should be removed from the tree on popuphidden
+    ],
+  };
+
+  testAccessibleTree(searchbar, TREE);
+});
diff --git a/accessible/tests/browser/tree/browser_shadowdom.js b/accessible/tests/browser/tree/browser_shadowdom.js
new file mode 100644
index 0000000000..6d9f06f9ff
--- /dev/null
+++ b/accessible/tests/browser/tree/browser_shadowdom.js
@@ -0,0 +1,98 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const REORDER = { expected: [[EVENT_REORDER, "container"]] };
+
+// Dynamically inserted slotted accessible elements should be in
+// the accessible tree.
+const snippet = `
+<script>
+customElements.define("x-el", class extends HTMLElement {
+  constructor() {
+    super();
+    this.attachShadow({ mode: "open" });
+    this.shadowRoot.innerHTML =
+      "<div role='presentation'><slot></slot></div>";
+  }
+});
+</script>
+<x-el id="container" role="group"><label id="l1">label1</label></x-el>
+`;
+
+addAccessibleTask(snippet, async function (browser, accDoc) {
+  let container = findAccessibleChildByID(accDoc, "container");
+
+  testChildrenIds(container, ["l1"]);
+
+  await contentSpawnMutation(browser, REORDER, function () {
+    let labelEl = content.document.createElement("label");
+    labelEl.id = "l2";
+
+    let containerEl = content.document.getElementById("container");
+    containerEl.appendChild(labelEl);
+  });
+
+  testChildrenIds(container, ["l1", "l2"]);
+});
+
+// Dynamically inserted not accessible custom element containing an accessible
+// in its shadow DOM.
+const snippet2 = `
+<script>
+customElements.define("x-el2", class extends HTMLElement {
+  constructor() {
+    super();
+    this.attachShadow({ mode: "open" });
+    this.shadowRoot.innerHTML = "<input id='input'>";
+  }
+});
+</script>
+<div role="group" id="container"></div>
+`;
+
+addAccessibleTask(snippet2, async function (browser, accDoc) {
+  let container = findAccessibleChildByID(accDoc, "container");
+
+  await contentSpawnMutation(browser, REORDER, function () {
+    content.document.getElementById("container").innerHTML = "<x-el2></x-el2>";
+  });
+
+  testChildrenIds(container, ["input"]);
+});
+
+/**
+ * Ensure that changing the slot on the body while moving the body doesn't
+ * try to remove the DocAccessible. We test this here instead of in
+ * accessible/tests/mochitest/treeupdate/test_shadow_slots.html because this
+ * messes with the body element and we don't want that to impact other tests.
+ */
+addAccessibleTask(
+  `
+<div id="host"></div>
+<script>
+  const host = document.getElementById("host");
+  host.attachShadow({ mode: "open" });
+  const emptyScript = document.createElement("script");
+  emptyScript.id = "emptyScript";
+  document.head.append(emptyScript);
+</script>
+  `,
+  async function (browser, docAcc) {
+    info("Moving body and setting slot on body");
+    let reordered = waitForEvent(EVENT_REORDER, docAcc);
+    await invokeContentTask(browser, [], () => {
+      const host = content.document.getElementById("host");
+      const emptyScript = content.document.getElementById("emptyScript");
+      const body = content.document.body;
+      emptyScript.append(host);
+      host.append(body);
+      body.slot = "";
+    });
+    await reordered;
+    is(docAcc.childCount, 0, "document has no children after body move");
+  },
+  { chrome: true, topLevel: true, iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/tree/browser_test_nsIAccessibleDocument_URL.js b/accessible/tests/browser/tree/browser_test_nsIAccessibleDocument_URL.js
new file mode 100644
index 0000000000..623f2640f0
--- /dev/null
+++ b/accessible/tests/browser/tree/browser_test_nsIAccessibleDocument_URL.js
@@ -0,0 +1,54 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+async function promiseEventDocumentLoadComplete(expectedURL) {
+  return new Promise(resolve => {
+    waitForEvent(EVENT_DOCUMENT_LOAD_COMPLETE, event => {
+      try {
+        if (
+          event.accessible.QueryInterface(nsIAccessibleDocument).URL ==
+          expectedURL
+        ) {
+          resolve(event.accessible.QueryInterface(nsIAccessibleDocument));
+          return true;
+        }
+        return false;
+      } catch (e) {
+        return false;
+      }
+    });
+  });
+}
+
+add_task(async function testInDataURI() {
+  const kURL = "data:text/html,Some text";
+  const waitForDocumentLoadComplete = promiseEventDocumentLoadComplete("");
+  await BrowserTestUtils.withNewTab(kURL, async browser => {
+    is(
+      (await waitForDocumentLoadComplete).URL,
+      "",
+      "nsIAccessibleDocument.URL shouldn't return data URI"
+    );
+  });
+});
+
+add_task(async function testInHTTPSURIContainingPrivateThings() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["network.auth.confirmAuth.enabled", false]],
+  });
+  const kURL =
+    "https://username:password@example.com/browser/toolkit/content/tests/browser/file_empty.html?query=some#ref";
+  const kURLWithoutUserPass =
+    "https://example.com/browser/toolkit/content/tests/browser/file_empty.html?query=some#ref";
+  const waitForDocumentLoadComplete =
+    promiseEventDocumentLoadComplete(kURLWithoutUserPass);
+  await BrowserTestUtils.withNewTab(kURL, async browser => {
+    is(
+      (await waitForDocumentLoadComplete).URL,
+      kURLWithoutUserPass,
+      "nsIAccessibleDocument.URL shouldn't contain user/pass section"
+    );
+  });
+});
diff --git a/accessible/tests/browser/tree/head.js b/accessible/tests/browser/tree/head.js
new file mode 100644
index 0000000000..b9c787e9e2
--- /dev/null
+++ b/accessible/tests/browser/tree/head.js
@@ -0,0 +1,33 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/* exported testChildrenIds */
+
+// Load the shared-head file first.
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as promisified-events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
+
+/*
+ * A test function for comparing the IDs of an accessible's children
+ * with an expected array of IDs.
+ */
+function testChildrenIds(acc, expectedIds) {
+  let ids = arrayFromChildren(acc).map(child => getAccessibleDOMNodeID(child));
+  Assert.deepEqual(
+    ids,
+    expectedIds,
+    `Children for ${getAccessibleDOMNodeID(acc)} are wrong.`
+  );
+}