1 files changed, 83 insertions, 0 deletions
diff --git a/devtools/client/shared/test/browser_html_tooltip_arrow-02.js b/devtools/client/shared/test/browser_html_tooltip_arrow-02.js
new file mode 100644
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+++ b/devtools/client/shared/test/browser_html_tooltip_arrow-02.js
@@ -0,0 +1,83 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+/* import-globals-from helper_html_tooltip.js */
+
+"use strict";
+
+/**
+ * Test the HTMLTooltip "arrow" type on wide anchors. The arrow should remain
+ * aligned with the anchors as much as possible
+ */
+
+const HTML_NS = "http://www.w3.org/1999/xhtml";
+const TEST_URI = CHROME_URL_ROOT + "doc_html_tooltip_arrow-02.xhtml";
+
+const {
+  HTMLTooltip,
+} = require("devtools/client/shared/widgets/tooltip/HTMLTooltip");
+loadHelperScript("helper_html_tooltip.js");
+
+let useXulWrapper;
+
+add_task(async function() {
+  // Force the toolbox to be 200px high;
+  await pushPref("devtools.toolbox.footer.height", 200);
+
+  const { doc } = await createHost("bottom", TEST_URI);
+
+  info("Run tests for a Tooltip without using a XUL panel");
+  useXulWrapper = false;
+  await runTests(doc);
+
+  info("Run tests for a Tooltip with a XUL panel");
+  useXulWrapper = true;
+  await runTests(doc);
+});
+
+async function runTests(doc) {
+  info("Create HTML tooltip");
+  const tooltip = new HTMLTooltip(doc, { type: "arrow", useXulWrapper });
+  const div = doc.createElementNS(HTML_NS, "div");
+  div.style.height = "35px";
+  tooltip.panel.appendChild(div);
+  tooltip.setContentSize({ width: 200, height: 35 });
+
+  const { right: docRight } = doc.documentElement.getBoundingClientRect();
+
+  const elements = [...doc.querySelectorAll(".anchor")];
+  for (const el of elements) {
+    info("Display the tooltip on an anchor.");
+    await showTooltip(tooltip, el);
+
+    const arrow = tooltip.arrow;
+    ok(arrow, "Tooltip has an arrow");
+
+    // Get the geometry of the anchor, the tooltip panel & arrow.
+    const arrowBounds = arrow.getBoxQuads({ relativeTo: doc })[0].getBounds();
+    const panelBounds = tooltip.panel
+      .getBoxQuads({ relativeTo: doc })[0]
+      .getBounds();
+    const anchorBounds = el.getBoxQuads({ relativeTo: doc })[0].getBounds();
+
+    const intersects =
+      arrowBounds.left <= anchorBounds.right &&
+      arrowBounds.right >= anchorBounds.left;
+    const isBlockedByViewport =
+      arrowBounds.left == 0 || arrowBounds.right == docRight;
+    ok(
+      intersects || isBlockedByViewport,
+      "Tooltip arrow is aligned with the anchor, or stuck on viewport's edge."
+    );
+
+    const isInPanel =
+      arrowBounds.left >= panelBounds.left &&
+      arrowBounds.right <= panelBounds.right;
+    ok(
+      isInPanel,
+      "The tooltip arrow remains inside the tooltip panel horizontally"
+    );
+    await hideTooltip(tooltip);
+  }
+
+  tooltip.destroy();
+}