1 files changed, 100 insertions, 0 deletions
diff --git a/devtools/client/inspector/markup/test/browser_markup_keybindings_scrolltonode.js b/devtools/client/inspector/markup/test/browser_markup_keybindings_scrolltonode.js
new file mode 100644
index 0000000000..faf8bc575c
--- /dev/null
+++ b/devtools/client/inspector/markup/test/browser_markup_keybindings_scrolltonode.js
@@ -0,0 +1,100 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test the keyboard shortcut "S" used to scroll to the selected node.
+
+const HTML = `<div style="width: 300px; height: 3000px; position:relative;">
+    <div id="scroll-top"
+      style="height: 50px; top: 0; position:absolute;">
+      TOP</div>
+    <div id="scroll-bottom"
+      style="height: 50px; bottom: 0; position:absolute;">
+      BOTTOM</div>
+  </div>`;
+const TEST_URL = "data:text/html;charset=utf-8," + encodeURIComponent(HTML);
+
+add_task(async function () {
+  const { inspector } = await openInspectorForURL(TEST_URL);
+
+  info("Make sure the markup frame has the focus");
+  inspector.markup._frame.focus();
+
+  info("Before test starts, #scroll-top is visible, #scroll-bottom is hidden");
+  await checkElementIsInViewport("#scroll-top", true);
+  await checkElementIsInViewport("#scroll-bottom", false);
+
+  info("Select the #scroll-bottom node");
+  await selectNode("#scroll-bottom", inspector);
+  info("Press S to scroll to the bottom node");
+  let waitForScroll = BrowserTestUtils.waitForContentEvent(
+    gBrowser.selectedBrowser,
+    "scroll"
+  );
+  await EventUtils.synthesizeKey("S", {}, inspector.panelWin);
+  await waitForScroll;
+  ok(true, "Scroll event received");
+
+  info("#scroll-top should be scrolled out, #scroll-bottom should be visible");
+  await checkElementIsInViewport("#scroll-top", false);
+  await checkElementIsInViewport("#scroll-bottom", true);
+
+  info("Select the #scroll-top node");
+  await selectNode("#scroll-top", inspector);
+  info("Press S to scroll to the top node");
+  waitForScroll = BrowserTestUtils.waitForContentEvent(
+    gBrowser.selectedBrowser,
+    "scroll"
+  );
+  await EventUtils.synthesizeKey("S", {}, inspector.panelWin);
+  await waitForScroll;
+  ok(true, "Scroll event received");
+
+  info("#scroll-top should be visible, #scroll-bottom should be scrolled out");
+  await checkElementIsInViewport("#scroll-top", true);
+  await checkElementIsInViewport("#scroll-bottom", false);
+
+  info("Select #scroll-bottom node");
+  await selectNode("#scroll-bottom", inspector);
+  info("Press shift + S, nothing should happen due to the modifier");
+  await EventUtils.synthesizeKey("S", { shiftKey: true }, inspector.panelWin);
+
+  info("Same state, #scroll-top is visible, #scroll-bottom is scrolled out");
+  await checkElementIsInViewport("#scroll-top", true);
+  await checkElementIsInViewport("#scroll-bottom", false);
+});
+
+/**
+ * Verify that the element matching the provided selector is either in or out
+ * of the viewport, depending on the provided "expected" argument.
+ * Returns a promise that will resolve when the test has been performed.
+ *
+ * @param {String} selector
+ *        css selector for the element to test
+ * @param {Boolean} expected
+ *        true if the element is expected to be in the viewport, false otherwise
+ * @return {Promise} promise
+ */
+async function checkElementIsInViewport(selector, expected) {
+  const isInViewport = await SpecialPowers.spawn(
+    gBrowser.selectedBrowser,
+    [selector],
+    _selector => {
+      const node = content.document.querySelector(_selector);
+      const rect = node.getBoundingClientRect();
+      return (
+        rect.bottom >= 0 &&
+        rect.right >= 0 &&
+        rect.top <= content.innerHeight &&
+        rect.left <= content.innerWidth
+      );
+    }
+  );
+
+  is(
+    isInViewport,
+    expected,
+    selector + " in the viewport: expected to be " + expected
+  );
+}