1 files changed, 46 insertions, 0 deletions
diff --git a/toolkit/components/printing/tests/browser_print_scaling.js b/toolkit/components/printing/tests/browser_print_scaling.js
new file mode 100644
index 0000000000..85b8a68449
--- /dev/null
+++ b/toolkit/components/printing/tests/browser_print_scaling.js
@@ -0,0 +1,46 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function testInvalidScaleResetAfterDestinationChange() {
+  const mockPrinterName = "Fake Printer";
+  await PrintHelper.withTestPage(async helper => {
+    helper.addMockPrinter(mockPrinterName);
+    await helper.startPrint();
+
+    let destinationPicker = helper.get("printer-picker");
+
+    await helper.openMoreSettings();
+    let scaleRadio = helper.get("percent-scale-choice");
+    await helper.assertSettingsChanged(
+      { shrinkToFit: true },
+      { shrinkToFit: false },
+      async () => {
+        await helper.waitForPreview(() => helper.click(scaleRadio));
+      }
+    );
+    let percentScale = helper.get("percent-scale");
+
+    let scaleError = helper.get("error-invalid-scale");
+
+    await helper.assertSettingsNotChanged({ scaling: 1 }, async () => {
+      ok(scaleError.hidden, "Scale error is hidden");
+      await helper.text(percentScale, "9");
+      await BrowserTestUtils.waitForAttributeRemoval("hidden", scaleError);
+      ok(!scaleError.hidden, "Scale error is showing");
+    });
+
+    is(destinationPicker.disabled, false, "Destination picker is enabled");
+
+    // Select a new printer
+    await helper.dispatchSettingsChange({ printerName: mockPrinterName });
+    await BrowserTestUtils.waitForCondition(
+      () => scaleError.hidden,
+      "Wait for scale error to be hidden"
+    );
+    is(percentScale.value, "100", "Scale has reset to 100");
+
+    await helper.closeDialog();
+  });
+});