1 files changed, 59 insertions, 0 deletions
diff --git a/toolkit/modules/tests/browser/browser_Finder_vertical_text.js b/toolkit/modules/tests/browser/browser_Finder_vertical_text.js
new file mode 100644
index 0000000000..c20c4ea8f6
--- /dev/null
+++ b/toolkit/modules/tests/browser/browser_Finder_vertical_text.js
@@ -0,0 +1,59 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+add_task(async function test_vertical_text() {
+  const URI =
+    '<body><div style="writing-mode: vertical-rl">vertical-rl</div><div style="writing-mode: vertical-lr">vertical-lr</div><div style="writing-mode: sideways-rl">sideways-rl</div><div style="writing-mode: sideways-lr">sideways-lr</div></body>';
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: "data:text/html;charset=utf-8," + encodeURIComponent(URI),
+    },
+    async function (browser) {
+      let finder = browser.finder;
+      let listener = {
+        onFindResult() {
+          ok(false, "callback wasn't replaced");
+        },
+      };
+      finder.addResultListener(listener);
+
+      function waitForFind() {
+        return new Promise(resolve => {
+          listener.onFindResult = resolve;
+        });
+      }
+
+      let targets = [
+        // Full matches use one path in our find code.
+        "vertical-rl",
+        "vertical-lr",
+        "sideways-rl",
+        "sideways-lr",
+        // Partial matches use a second path in our find code.
+        "l-r",
+        "l-l",
+        "s-r",
+        "s-l",
+      ];
+
+      for (let i = 0; i < targets.length; ++i) {
+        // Find the target text.
+        let target = targets[i];
+        let promiseFind = waitForFind();
+        finder.fastFind(target, false, false);
+        let findResult = await promiseFind;
+
+        // We check the logical inversion of not not found, because found and wrapped are
+        // two different correct results, but not found is the only incorrect result.
+        isnot(
+          findResult.result,
+          Ci.nsITypeAheadFind.FIND_NOTFOUND,
+          "Found target text '" + target + "'."
+        );
+      }
+
+      finder.removeResultListener(listener);
+    }
+  );
+});