1 files changed, 151 insertions, 0 deletions
diff --git a/browser/components/firefoxview/tests/browser/browser_opentabs_more.js b/browser/components/firefoxview/tests/browser/browser_opentabs_more.js
new file mode 100644
index 0000000000..fd25348699
--- /dev/null
+++ b/browser/components/firefoxview/tests/browser/browser_opentabs_more.js
@@ -0,0 +1,151 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let gInitialTab;
+let gInitialTabURL;
+
+// This test opens many tabs and regularly times out - especially with verify
+requestLongerTimeout(2);
+
+add_setup(function () {
+  gInitialTab = gBrowser.selectedTab;
+  gInitialTabURL = gBrowser.selectedBrowser.currentURI.spec;
+});
+
+async function cleanup() {
+  await SimpleTest.promiseFocus(window);
+  await promiseAllButPrimaryWindowClosed();
+  await BrowserTestUtils.switchTab(gBrowser, gInitialTab);
+  await closeFirefoxViewTab(window);
+
+  // clean up extra tabs
+  while (gBrowser.tabs.length > 1) {
+    BrowserTestUtils.removeTab(gBrowser.tabs.at(-1));
+  }
+
+  is(
+    BrowserWindowTracker.orderedWindows.length,
+    1,
+    "One window at the end of test cleanup"
+  );
+  Assert.deepEqual(
+    gBrowser.tabs.map(tab => tab.linkedBrowser.currentURI.spec),
+    [gInitialTabURL],
+    "One about:blank tab open at the end up test cleanup"
+  );
+}
+
+add_task(async function toggle_show_more_link() {
+  const tabEntry = url => ({
+    entries: [{ url, triggeringPrincipal_base64 }],
+  });
+  const NUMBER_OF_WINDOWS = 4;
+  const NUMBER_OF_TABS = 42;
+  const browserState = { windows: [] };
+  for (let windowIndex = 0; windowIndex < NUMBER_OF_WINDOWS; windowIndex++) {
+    const winData = { tabs: [] };
+    let tabCount = windowIndex == NUMBER_OF_WINDOWS - 1 ? NUMBER_OF_TABS : 1;
+    for (let i = 0; i < tabCount; i++) {
+      winData.tabs.push(tabEntry(`data:,Window${windowIndex}-Tab${i}`));
+    }
+    winData.selected = winData.tabs.length;
+    browserState.windows.push(winData);
+  }
+  // use Session restore to batch-open windows and tabs
+  info(`Restoring to browserState: ${JSON.stringify(browserState, null, 2)}`);
+  await SessionStoreTestUtils.promiseBrowserState(browserState);
+  info("Windows and tabs opened, waiting for readyWindowsPromise");
+  await NonPrivateTabs.readyWindowsPromise;
+  info("readyWindowsPromise resolved");
+
+  // restoring this state requires an update to the initial tab globals
+  // so cleanup expects the right thing
+  gInitialTab = gBrowser.selectedTab;
+  gInitialTabURL = gBrowser.selectedBrowser.currentURI.spec;
+
+  const windows = Array.from(Services.wm.getEnumerator("navigator:browser"));
+  is(windows.length, NUMBER_OF_WINDOWS, "There are four browser windows.");
+
+  const tab = (win = window) => {
+    info("Tab");
+    EventUtils.synthesizeKey("KEY_Tab", {}, win);
+  };
+
+  const enter = (win = window) => {
+    info("Enter");
+    EventUtils.synthesizeKey("KEY_Enter", {}, win);
+  };
+
+  let lastCard;
+
+  await openFirefoxViewTab(window).then(async viewTab => {
+    const browser = viewTab.linkedBrowser;
+    await navigateToOpenTabs(browser);
+    const openTabs = getOpenTabsComponent(browser);
+    await openTabs.updateComplete;
+
+    let cards;
+    info(`Waiting for ${NUMBER_OF_WINDOWS} of window cards`);
+    await BrowserTestUtils.waitForCondition(() => {
+      cards = getOpenTabsCards(openTabs);
+      return cards.length == NUMBER_OF_WINDOWS;
+    });
+    is(cards.length, NUMBER_OF_WINDOWS, "There are four windows.");
+    lastCard = cards[NUMBER_OF_WINDOWS - 1];
+
+    Assert.less(
+      (await getTabRowsForCard(lastCard)).length,
+      NUMBER_OF_TABS,
+      "Not all tabs are shown yet."
+    );
+    info("Toggle the Show More link.");
+    lastCard.shadowRoot.querySelector("div[slot=footer]").click();
+    await BrowserTestUtils.waitForMutationCondition(
+      lastCard.shadowRoot,
+      { childList: true, subtree: true },
+      async () => (await getTabRowsForCard(lastCard)).length === NUMBER_OF_TABS
+    );
+
+    info("Toggle the Show Less link.");
+    lastCard.shadowRoot.querySelector("div[slot=footer]").click();
+    await BrowserTestUtils.waitForMutationCondition(
+      lastCard.shadowRoot,
+      { childList: true, subtree: true },
+      async () => (await getTabRowsForCard(lastCard)).length < NUMBER_OF_TABS
+    );
+
+    // Setting this pref allows the test to run as expected with a keyboard on MacOS
+    await SpecialPowers.pushPrefEnv({
+      set: [["accessibility.tabfocus", 7]],
+    });
+
+    info("Toggle the Show More link with keyboard.");
+    lastCard.shadowRoot.querySelector("card-container").summaryEl.focus();
+    // Tab to first item in the list
+    tab();
+    // Tab to the footer
+    tab();
+    enter();
+    await BrowserTestUtils.waitForMutationCondition(
+      lastCard.shadowRoot,
+      { childList: true, subtree: true },
+      async () => (await getTabRowsForCard(lastCard)).length === NUMBER_OF_TABS
+    );
+
+    info("Toggle the Show Less link with keyboard.");
+    lastCard.shadowRoot.querySelector("card-container").summaryEl.focus();
+    // Tab to first item in the list
+    tab();
+    // Tab to the footer
+    tab();
+    enter();
+    await BrowserTestUtils.waitForMutationCondition(
+      lastCard.shadowRoot,
+      { childList: true, subtree: true },
+      async () => (await getTabRowsForCard(lastCard)).length < NUMBER_OF_TABS
+    );
+
+    await SpecialPowers.popPrefEnv();
+  });
+  await cleanup();
+});