1 files changed, 113 insertions, 0 deletions
diff --git a/accessible/tests/browser/hittest/head.js b/accessible/tests/browser/hittest/head.js
new file mode 100644
index 0000000000..c2904b1578
--- /dev/null
+++ b/accessible/tests/browser/hittest/head.js
@@ -0,0 +1,113 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/* exported CommonUtils, testChildAtPoint, Layout, hitTest, testOffsetAtPoint */
+
+// Load the shared-head file first.
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as promisified-events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
+
+const { CommonUtils } = ChromeUtils.importESModule(
+  "chrome://mochitests/content/browser/accessible/tests/browser/Common.sys.mjs"
+);
+
+const { Layout } = ChromeUtils.importESModule(
+  "chrome://mochitests/content/browser/accessible/tests/browser/Layout.sys.mjs"
+);
+
+function getChildAtPoint(container, x, y, findDeepestChild) {
+  try {
+    return findDeepestChild
+      ? container.getDeepestChildAtPoint(x, y)
+      : container.getChildAtPoint(x, y);
+  } catch (e) {
+    // Failed to get child at point.
+  }
+  info("could not get child at point");
+  return null;
+}
+
+async function testChildAtPoint(dpr, x, y, container, child, grandChild) {
+  const [containerX, containerY] = Layout.getBounds(container, dpr);
+  x += containerX;
+  y += containerY;
+  let actual = null;
+  await untilCacheIs(
+    () => {
+      actual = getChildAtPoint(container, x, y, false);
+      info(`Got direct child match of ${CommonUtils.prettyName(actual)}`);
+      return actual;
+    },
+    child,
+    `Wrong direct child accessible at the point (${x}, ${y}) of ${CommonUtils.prettyName(
+      container
+    )}, sought ${CommonUtils.prettyName(
+      child
+    )} and got ${CommonUtils.prettyName(actual)}`
+  );
+  actual = null;
+  await untilCacheIs(
+    () => {
+      actual = getChildAtPoint(container, x, y, true);
+      info(`Got deepest child match of ${CommonUtils.prettyName(actual)}`);
+      return actual;
+    },
+    grandChild,
+    `Wrong deepest child accessible at the point (${x}, ${y}) of ${CommonUtils.prettyName(
+      container
+    )}, sought ${CommonUtils.prettyName(
+      grandChild
+    )} and got ${CommonUtils.prettyName(actual)}`
+  );
+}
+
+/**
+ * Test if getChildAtPoint returns the given child and grand child accessibles
+ * at coordinates of child accessible (direct and deep hit test).
+ */
+async function hitTest(browser, container, child, grandChild) {
+  const [childX, childY] = await getContentBoundsForDOMElm(
+    browser,
+    getAccessibleDOMNodeID(child)
+  );
+  const x = childX + 1;
+  const y = childY + 1;
+
+  await untilCacheIs(
+    () => getChildAtPoint(container, x, y, false),
+    child,
+    `Wrong direct child accessible at the point (${x}, ${y}) of ${CommonUtils.prettyName(
+      container
+    )}, sought ${CommonUtils.prettyName(child)}`
+  );
+  await untilCacheIs(
+    () => getChildAtPoint(container, x, y, true),
+    grandChild,
+    `Wrong deepest child accessible at the point (${x}, ${y}) of ${CommonUtils.prettyName(
+      container
+    )}, sought ${CommonUtils.prettyName(grandChild)}`
+  );
+}
+
+/**
+ * Test if getOffsetAtPoint returns the given text offset at given coordinates.
+ */
+async function testOffsetAtPoint(hyperText, x, y, coordType, expectedOffset) {
+  await untilCacheIs(
+    () => hyperText.getOffsetAtPoint(x, y, coordType),
+    expectedOffset,
+    `Wrong offset at given point (${x}, ${y}) for ${prettyName(hyperText)}`
+  );
+}