1 files changed, 108 insertions, 0 deletions
diff --git a/browser/base/content/test/tabs/browser_tab_tooltips.js b/browser/base/content/test/tabs/browser_tab_tooltips.js
new file mode 100644
index 0000000000..0fb70c5a07
--- /dev/null
+++ b/browser/base/content/test/tabs/browser_tab_tooltips.js
@@ -0,0 +1,108 @@
+// Offset within the tab for the mouse event
+const MOUSE_OFFSET = 7;
+
+// Normal tooltips are positioned vertically at least this amount
+const MIN_VERTICAL_TOOLTIP_OFFSET = 18;
+
+function openTooltip(node, tooltip) {
+  let tooltipShownPromise = BrowserTestUtils.waitForEvent(
+    tooltip,
+    "popupshown"
+  );
+  window.windowUtils.disableNonTestMouseEvents(true);
+  EventUtils.synthesizeMouse(node, 2, 2, { type: "mouseover" });
+  EventUtils.synthesizeMouse(node, 4, 4, { type: "mousemove" });
+  EventUtils.synthesizeMouse(node, MOUSE_OFFSET, MOUSE_OFFSET, {
+    type: "mousemove",
+  });
+  EventUtils.synthesizeMouse(node, 2, 2, { type: "mouseout" });
+  window.windowUtils.disableNonTestMouseEvents(false);
+  return tooltipShownPromise;
+}
+
+function closeTooltip(node, tooltip) {
+  let tooltipHiddenPromise = BrowserTestUtils.waitForEvent(
+    tooltip,
+    "popuphidden"
+  );
+  EventUtils.synthesizeMouse(document.documentElement, 2, 2, {
+    type: "mousemove",
+  });
+  return tooltipHiddenPromise;
+}
+
+// This test verifies that the tab tooltip appears at the correct location, aligned
+// with the bottom of the tab, and that the tooltip appears near the close button.
+add_task(async function () {
+  const tabUrl =
+    "data:text/html,<html><head><title>A Tab</title></head><body>Hello</body></html>";
+  let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, tabUrl);
+
+  let tooltip = document.getElementById("tabbrowser-tab-tooltip");
+  await openTooltip(tab, tooltip);
+
+  let tabRect = tab.getBoundingClientRect();
+  let tooltipRect = tooltip.getBoundingClientRect();
+
+  isfuzzy(
+    tooltipRect.left,
+    tabRect.left + MOUSE_OFFSET,
+    1,
+    "tooltip left position for tab"
+  );
+  ok(
+    tooltipRect.top >= tabRect.top + MIN_VERTICAL_TOOLTIP_OFFSET + MOUSE_OFFSET,
+    "tooltip top position for tab"
+  );
+  is(
+    tooltip.getAttribute("position"),
+    "",
+    "tooltip position attribute for tab"
+  );
+
+  await closeTooltip(tab, tooltip);
+
+  await openTooltip(tab.closeButton, tooltip);
+
+  let closeButtonRect = tab.closeButton.getBoundingClientRect();
+  tooltipRect = tooltip.getBoundingClientRect();
+
+  isfuzzy(
+    tooltipRect.left,
+    closeButtonRect.left + MOUSE_OFFSET,
+    1,
+    "tooltip left position for close button"
+  );
+  ok(
+    tooltipRect.top >
+      closeButtonRect.top + MIN_VERTICAL_TOOLTIP_OFFSET + MOUSE_OFFSET,
+    "tooltip top position for close button"
+  );
+  ok(
+    !tooltip.hasAttribute("position"),
+    "tooltip position attribute for close button"
+  );
+
+  await closeTooltip(tab, tooltip);
+
+  BrowserTestUtils.removeTab(tab);
+});
+
+// This test verifies that a mouse wheel closes the tooltip.
+add_task(async function () {
+  const tabUrl =
+    "data:text/html,<html><head><title>A Tab</title></head><body>Hello</body></html>";
+  let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, tabUrl);
+
+  let tooltip = document.getElementById("tabbrowser-tab-tooltip");
+  await openTooltip(tab, tooltip);
+
+  EventUtils.synthesizeWheel(tab, 4, 4, {
+    deltaMode: WheelEvent.DOM_DELTA_LINE,
+    deltaY: 1.0,
+  });
+
+  is(tooltip.state, "closed", "wheel event closed the tooltip");
+
+  BrowserTestUtils.removeTab(tab);
+});