1 files changed, 64 insertions, 0 deletions
diff --git a/accessible/tests/browser/hittest/browser_test_zoom_text.js b/accessible/tests/browser/hittest/browser_test_zoom_text.js
new file mode 100644
index 0000000000..9e429c16b3
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_zoom_text.js
@@ -0,0 +1,64 @@
+/* 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";
+
+async function runTests(browser, accDoc) {
+  const expectedLength = await invokeContentTask(browser, [], () => {
+    const { CommonUtils } = ChromeUtils.importESModule(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Common.sys.mjs"
+    );
+    const hyperText = CommonUtils.getNode("paragraph", content.document);
+    return Math.floor(hyperText.textContent.length / 2);
+  });
+  const hyperText = findAccessibleChildByID(accDoc, "paragraph", [
+    Ci.nsIAccessibleText,
+  ]);
+  const textNode = hyperText.firstChild;
+
+  let [x, y, width, height] = Layout.getBounds(
+    textNode,
+    await getContentDPR(browser)
+  );
+
+  await testOffsetAtPoint(
+    hyperText,
+    x + width / 2,
+    y + height / 2,
+    COORDTYPE_SCREEN_RELATIVE,
+    expectedLength
+  );
+
+  await invokeContentTask(browser, [], () => {
+    const { Layout } = ChromeUtils.importESModule(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Layout.sys.mjs"
+    );
+
+    Layout.zoomDocument(content.document, 2.0);
+    content.document.body.offsetTop; // getBounds doesn't flush layout on its own.
+  });
+
+  [x, y, width, height] = Layout.getBounds(
+    textNode,
+    await getContentDPR(browser)
+  );
+
+  await testOffsetAtPoint(
+    hyperText,
+    x + width / 2,
+    y + height / 2,
+    COORDTYPE_SCREEN_RELATIVE,
+    expectedLength
+  );
+}
+
+addAccessibleTask(
+  `<p id="paragraph" style="font-family: monospace;">hello world hello world</p>`,
+  runTests,
+  {
+    iframe: true,
+    remoteIframe: true,
+    iframeAttrs: { style: "width: 600px; height: 600px;" },
+  }
+);