1 files changed, 91 insertions, 0 deletions
diff --git a/browser/base/content/test/keyboard/browser_cancel_caret_browsing_in_content.js b/browser/base/content/test/keyboard/browser_cancel_caret_browsing_in_content.js
new file mode 100644
index 0000000000..719b92eed6
--- /dev/null
+++ b/browser/base/content/test/keyboard/browser_cancel_caret_browsing_in_content.js
@@ -0,0 +1,91 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function () {
+  const kPrefName_CaretBrowsingOn = "accessibility.browsewithcaret";
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["accessibility.browsewithcaret_shortcut.enabled", true],
+      ["accessibility.warn_on_browsewithcaret", false],
+      ["test.events.async.enabled", true],
+      [kPrefName_CaretBrowsingOn, false],
+    ],
+  });
+
+  await BrowserTestUtils.withNewTab(
+    "https://example.com/browser/browser/base/content/test/keyboard/file_empty.html",
+    async function (browser) {
+      await SpecialPowers.spawn(browser, [], () => {
+        content.document.documentElement.scrollTop; // Flush layout.
+      });
+      function promiseFirstAndReplyKeyEvents(aExpectedConsume) {
+        return new Promise(resolve => {
+          const eventType = aExpectedConsume ? "keydown" : "keypress";
+          let eventCount = 0;
+          let listener = () => {
+            if (++eventCount === 2) {
+              window.removeEventListener(eventType, listener, {
+                capture: true,
+                mozSystemGroup: true,
+              });
+              resolve();
+            }
+          };
+          window.addEventListener(eventType, listener, {
+            capture: true,
+            mozSystemGroup: true,
+          });
+          registerCleanupFunction(() => {
+            window.removeEventListener(eventType, listener, {
+              capture: true,
+              mozSystemGroup: true,
+            });
+          });
+        });
+      }
+      let promiseReplyF7KeyEvents = promiseFirstAndReplyKeyEvents(false);
+      EventUtils.synthesizeKey("KEY_F7");
+      info("Waiting reply F7 keypress event...");
+      await promiseReplyF7KeyEvents;
+      await TestUtils.waitForTick();
+      is(
+        Services.prefs.getBoolPref(kPrefName_CaretBrowsingOn),
+        true,
+        "F7 key should enable caret browsing mode"
+      );
+
+      await SpecialPowers.pushPrefEnv({
+        set: [[kPrefName_CaretBrowsingOn, false]],
+      });
+
+      await SpecialPowers.spawn(browser, [], () => {
+        content.document.documentElement.scrollTop; // Flush layout.
+        content.window.addEventListener(
+          "keydown",
+          event => event.preventDefault(),
+          { capture: true }
+        );
+      });
+      promiseReplyF7KeyEvents = promiseFirstAndReplyKeyEvents(true);
+      EventUtils.synthesizeKey("KEY_F7");
+      info("Waiting for reply F7 keydown event...");
+      await promiseReplyF7KeyEvents;
+      try {
+        info(`Checking reply keypress event is not fired...`);
+        await TestUtils.waitForCondition(
+          () => Services.prefs.getBoolPref(kPrefName_CaretBrowsingOn),
+          "",
+          100, // interval
+          5 // maxTries
+        );
+      } catch (e) {}
+      is(
+        Services.prefs.getBoolPref(kPrefName_CaretBrowsingOn),
+        false,
+        "F7 key shouldn't enable caret browsing mode because F7 keydown event is consumed by web content"
+      );
+    }
+  );
+});