1 files changed, 39 insertions, 0 deletions
diff --git a/toolkit/components/printing/tests/browser_print_settings_fallback.js b/toolkit/components/printing/tests/browser_print_settings_fallback.js
new file mode 100644
index 0000000000..6f30c87d8c
--- /dev/null
+++ b/toolkit/components/printing/tests/browser_print_settings_fallback.js
@@ -0,0 +1,39 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+let badPrinterName = "Bad";
+let otherPrinterName = "Fallback";
+
+async function setupPrinters(helper) {
+  let badPrinter = helper.addMockPrinter({
+    name: badPrinterName,
+  });
+
+  let badPrinterInfo = await badPrinter.printerInfo;
+  badPrinterInfo.defaultSettings.printerName = "";
+
+  helper.addMockPrinter(otherPrinterName);
+
+  await SpecialPowers.pushPrefEnv({
+    set: [["print_printer", badPrinterName]],
+  });
+}
+
+add_task(async function testBadPrinterSettings() {
+  await PrintHelper.withTestPage(async helper => {
+    await setupPrinters(helper);
+    await helper.startPrint();
+
+    let destinationPicker = helper.get("printer-picker");
+    // Fallback can be any other printer, the fallback or save to pdf printer.
+    isnot(
+      destinationPicker.value,
+      badPrinterName,
+      "A fallback printer is selected"
+    );
+
+    await helper.closeDialog();
+  });
+});