1 files changed, 134 insertions, 0 deletions
diff --git a/toolkit/components/aboutprocesses/tests/browser/browser_aboutprocesses_twisty.js b/toolkit/components/aboutprocesses/tests/browser/browser_aboutprocesses_twisty.js
new file mode 100644
index 0000000000..b29ec37a0c
--- /dev/null
+++ b/toolkit/components/aboutprocesses/tests/browser/browser_aboutprocesses_twisty.js
@@ -0,0 +1,134 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+let doc, tbody, tabAboutProcesses;
+
+const rowTypes = ["process", "window", "thread-summary", "thread"];
+
+function promiseUpdate() {
+  return promiseAboutProcessesUpdated({
+    doc,
+    tbody,
+    force: true,
+    tabAboutProcesses,
+  });
+}
+
+add_setup(async function() {
+  Services.prefs.setBoolPref("toolkit.aboutProcesses.showThreads", true);
+
+  info("Setting up about:processes");
+  tabAboutProcesses = await BrowserTestUtils.openNewForegroundTab({
+    gBrowser,
+    opening: "about:processes",
+    waitForLoad: true,
+  });
+
+  doc = tabAboutProcesses.linkedBrowser.contentDocument;
+  tbody = doc.getElementById("process-tbody");
+  await promiseUpdate();
+});
+
+add_task(function testTwistyImageButtonSetup() {
+  let twistyBtn = doc.querySelector("tr.thread-summary .twisty");
+  let groupRow = twistyBtn.parentNode.parentNode;
+  let groupRowId = groupRow.firstChild.children[1].getAttribute("id");
+  let groupRowLabelId = groupRowId.split(":")[1];
+
+  info("Verify twisty button is properly set up.");
+  Assert.ok(
+    twistyBtn.hasAttribute("aria-labelledby"),
+    "the Twisty image button has an aria-labelledby"
+  );
+  Assert.equal(
+    twistyBtn.getAttribute("aria-labelledby"),
+    `${groupRowLabelId}-label ${groupRowId}`,
+    "the Twisty image button's aria-labelledby refers to a valid 'id' that is the Name of its row"
+  );
+  Assert.equal(
+    twistyBtn.getAttribute("role"),
+    "button",
+    "the Twisty image is programmatically a button"
+  );
+  Assert.equal(
+    twistyBtn.getAttribute("tabindex"),
+    "0",
+    "the Twisty image button is included in the focus order"
+  );
+  Assert.equal(
+    twistyBtn.getAttribute("aria-expanded"),
+    "false",
+    "the Twisty image button is collapsed by default"
+  );
+});
+
+add_task(function testTwistyImageButtonClicking() {
+  let twistyBtn = doc.querySelector("tr.thread-summary .twisty");
+  let groupRow = twistyBtn.parentNode.parentNode;
+
+  info(
+    "Verify we can toggle/open a list of threads by clicking the twisty button."
+  );
+  twistyBtn.click();
+
+  Assert.ok(
+    groupRow.nextSibling.classList.contains("thread") &&
+      !groupRow.nextSibling.classList.contains("thread-summary"),
+    "clicking a collapsed Twisty adds subitems after the row"
+  );
+  Assert.equal(
+    twistyBtn.getAttribute("aria-expanded"),
+    "true",
+    "the Twisty image button is expanded after a click"
+  );
+});
+
+add_task(function testTwistyImageButtonKeypressing() {
+  let twistyBtn = doc.querySelector("tr.thread-summary .twisty");
+  let groupRow = twistyBtn.parentNode.parentNode;
+
+  info(
+    `Verify we can toggle/close a list of threads by pressing Enter or
+    Space on the twisty button.`
+  );
+  // Verify the twisty button can be focused with a keyboard.
+  twistyBtn.focus();
+  Assert.equal(
+    twistyBtn,
+    doc.activeElement,
+    "the Twisty image button can be focused"
+  );
+
+  // Verify we can toggle subitems with a keyboard.
+  // Twisty is expanded
+  EventUtils.synthesizeKey("KEY_Enter");
+  Assert.ok(
+    !groupRow.nextSibling.classList.contains("thread") ||
+      groupRow.nextSibling.classList.contains("thread-summary"),
+    "pressing Enter on expanded Twisty hides a list of threads after the row"
+  );
+  Assert.equal(
+    twistyBtn.getAttribute("aria-expanded"),
+    "false",
+    "the Twisty image button is collapsed after an Enter keypress"
+  );
+  // Twisty is collapsed
+  EventUtils.synthesizeKey(" ");
+  Assert.ok(
+    groupRow.nextSibling.classList.contains("thread") &&
+      !groupRow.nextSibling.classList.contains("thread-summary"),
+    "pressing Space on collapsed Twisty shows a list of threads after the row"
+  );
+  Assert.equal(
+    twistyBtn.getAttribute("aria-expanded"),
+    "true",
+    "the Twisty image button is expanded after a Space keypress"
+  );
+});
+
+add_task(function cleanup() {
+  BrowserTestUtils.removeTab(tabAboutProcesses);
+  Services.prefs.clearUserPref("toolkit.aboutProcesses.showThreads");
+});