1 files changed, 158 insertions, 0 deletions
diff --git a/dom/events/test/browser_mouse_enterleave_switch_tab.js b/dom/events/test/browser_mouse_enterleave_switch_tab.js
new file mode 100644
index 0000000000..9c24120101
--- /dev/null
+++ b/dom/events/test/browser_mouse_enterleave_switch_tab.js
@@ -0,0 +1,158 @@
+"use strict";
+
+async function synthesizeMouseAndWait(aBrowser, aEvent) {
+  let promise = SpecialPowers.spawn(aBrowser, [aEvent], async event => {
+    await new Promise(resolve => {
+      content.document.documentElement.addEventListener(event, resolve, {
+        once: true,
+      });
+    });
+  });
+  // Ensure content has been added event listener.
+  await SpecialPowers.spawn(aBrowser, [], () => {});
+  EventUtils.synthesizeMouse(aBrowser, 10, 10, { type: aEvent });
+  return promise;
+}
+
+function AddMouseEventListener(aBrowser) {
+  return SpecialPowers.spawn(aBrowser, [], () => {
+    content.catchedEvents = [];
+    let listener = function (aEvent) {
+      content.catchedEvents.push(aEvent.type);
+    };
+
+    let target = content.document.querySelector("p");
+    target.onmouseenter = listener;
+    target.onmouseleave = listener;
+  });
+}
+
+function clearMouseEventListenerAndCheck(aBrowser, aExpectedEvents) {
+  return SpecialPowers.spawn(aBrowser, [aExpectedEvents], events => {
+    let target = content.document.querySelector("p");
+    target.onmouseenter = null;
+    target.onmouseleave = null;
+
+    Assert.deepEqual(content.catchedEvents, events);
+  });
+}
+
+add_task(async function testSwitchTabs() {
+  const tabFirst = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "http://example.com/browser/browser/base/content/test/general/dummy_page.html",
+    true
+  );
+
+  info("Initial mouse move");
+  await EventUtils.synthesizeAndWaitNativeMouseMove(
+    tabFirst.linkedBrowser,
+    10,
+    10
+  );
+
+  info("Open and move to a new tab");
+  await AddMouseEventListener(tabFirst.linkedBrowser);
+  const tabSecond = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "http://example.com/browser/browser/base/content/test/general/dummy_page.html"
+  );
+  // Synthesize a mousemove to generate corresponding mouseenter and mouseleave
+  // events.
+  await EventUtils.synthesizeAndWaitNativeMouseMove(
+    tabSecond.linkedBrowser,
+    10,
+    10
+  );
+  // Wait a bit to see if there is any unexpected mouse event.
+  await TestUtils.waitForTick();
+  await clearMouseEventListenerAndCheck(tabFirst.linkedBrowser, ["mouseleave"]);
+
+  info("switch back to the previous tab");
+  await AddMouseEventListener(tabFirst.linkedBrowser);
+  await AddMouseEventListener(tabSecond.linkedBrowser);
+  await BrowserTestUtils.switchTab(gBrowser, tabFirst);
+  // Synthesize a mousemove to generate corresponding mouseenter and mouseleave
+  // events.
+  await EventUtils.synthesizeAndWaitNativeMouseMove(
+    tabFirst.linkedBrowser,
+    10,
+    10
+  );
+  // Wait a bit to see if there is any unexpected mouse event.
+  await TestUtils.waitForTick();
+  await clearMouseEventListenerAndCheck(tabFirst.linkedBrowser, ["mouseenter"]);
+  await clearMouseEventListenerAndCheck(tabSecond.linkedBrowser, [
+    "mouseleave",
+  ]);
+
+  info("Close tabs");
+  BrowserTestUtils.removeTab(tabFirst);
+  BrowserTestUtils.removeTab(tabSecond);
+});
+
+add_task(async function testSwitchTabsWithMouseDown() {
+  const tabFirst = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "http://example.com/browser/browser/base/content/test/general/dummy_page.html",
+    true
+  );
+
+  info("Initial mouse move");
+  await EventUtils.synthesizeAndWaitNativeMouseMove(
+    tabFirst.linkedBrowser,
+    10,
+    10
+  );
+
+  info("mouse down");
+  await synthesizeMouseAndWait(tabFirst.linkedBrowser, "mousedown");
+
+  info("Open and move to a new tab");
+  await AddMouseEventListener(tabFirst.linkedBrowser);
+  const tabSecond = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "http://example.com/browser/browser/base/content/test/general/dummy_page.html"
+  );
+  // Synthesize a mousemove to generate corresponding mouseenter and mouseleave
+  // events.
+  await EventUtils.synthesizeAndWaitNativeMouseMove(
+    tabSecond.linkedBrowser,
+    10,
+    10
+  );
+
+  info("mouse up");
+  await synthesizeMouseAndWait(tabSecond.linkedBrowser, "mouseup");
+  // Wait a bit to see if there is any unexpected mouse event.
+  await TestUtils.waitForTick();
+  await clearMouseEventListenerAndCheck(tabFirst.linkedBrowser, ["mouseleave"]);
+
+  info("mouse down");
+  await synthesizeMouseAndWait(tabSecond.linkedBrowser, "mousedown");
+
+  info("switch back to the previous tab");
+  await AddMouseEventListener(tabFirst.linkedBrowser);
+  await AddMouseEventListener(tabSecond.linkedBrowser);
+  await BrowserTestUtils.switchTab(gBrowser, tabFirst);
+  // Synthesize a mousemove to generate corresponding mouseenter and mouseleave
+  // events.
+  await EventUtils.synthesizeAndWaitNativeMouseMove(
+    tabFirst.linkedBrowser,
+    10,
+    10
+  );
+
+  info("mouse up");
+  await synthesizeMouseAndWait(tabFirst.linkedBrowser, "mouseup");
+  // Wait a bit to see if there is any unexpected mouse event.
+  await TestUtils.waitForTick();
+  await clearMouseEventListenerAndCheck(tabFirst.linkedBrowser, ["mouseenter"]);
+  await clearMouseEventListenerAndCheck(tabSecond.linkedBrowser, [
+    "mouseleave",
+  ]);
+
+  info("Close tabs");
+  BrowserTestUtils.removeTab(tabFirst);
+  BrowserTestUtils.removeTab(tabSecond);
+});