1 files changed, 120 insertions, 0 deletions
diff --git a/toolkit/components/printing/tests/browser_print_paper_sizes.js b/toolkit/components/printing/tests/browser_print_paper_sizes.js
new file mode 100644
index 0000000000..6f81a2a0b4
--- /dev/null
+++ b/toolkit/components/printing/tests/browser_print_paper_sizes.js
@@ -0,0 +1,120 @@
+"use strict";
+
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+async function selectPaperOptionWithValue(helper, value) {
+  let paperSelect = helper.get("paper-size-picker");
+  paperSelect.dispatchSettingsChange({
+    paperId: value,
+  });
+  await helper.awaitAnimationFrame();
+}
+
+add_task(async function testBadPaperSizeUnitCorrection() {
+  await PrintHelper.withTestPage(async helper => {
+    // Set prefs to select a non-default paper size
+    await SpecialPowers.pushPrefEnv({
+      set: [
+        ["print.printer_Mozilla_Save_to_PDF.print_paper_id", "na_letter"],
+        // paperSizeUnit is a bogus value, but the dimensions are correct for inches
+        ["print.printer_Mozilla_Save_to_PDF.print_paper_size_unit", 99],
+        ["print.printer_Mozilla_Save_to_PDF.print_paper_height", "11.0"],
+        ["print.printer_Mozilla_Save_to_PDF.print_paper_width", "8.50"],
+      ],
+    });
+    await helper.startPrint();
+
+    let paperSelect = helper.get("paper-size-picker");
+    is(paperSelect.value, "na_letter", "The expected paper size is selected");
+    is(
+      helper.viewSettings.paperId,
+      "na_letter",
+      "The settings have the expected paperId"
+    );
+    is(
+      helper.viewSettings.paperSizeUnit,
+      helper.settings.kPaperSizeInches,
+      "Check paperSizeUnit"
+    );
+    is(helper.viewSettings.paperWidth.toFixed(1), "8.5", "Check paperWidth");
+    is(helper.viewSettings.paperHeight.toFixed(1), "11.0", "Check paperHeight");
+
+    await selectPaperOptionWithValue(helper, "iso_a3");
+    is(paperSelect.value, "iso_a3", "The expected paper size is selected");
+    is(
+      helper.viewSettings.paperId,
+      "iso_a3",
+      "The settings have the expected paperId"
+    );
+    is(
+      helper.viewSettings.paperSizeUnit,
+      helper.settings.kPaperSizeInches,
+      "Check paperSizeUnit"
+    );
+    is(helper.viewSettings.paperWidth.toFixed(1), "11.7", "Check paperWidth");
+    is(helper.viewSettings.paperHeight.toFixed(1), "16.5", "Check paperHeight");
+
+    await SpecialPowers.popPrefEnv();
+    await helper.closeDialog();
+  });
+});
+
+add_task(async function testMismatchedPaperSizeUnitCorrection() {
+  await PrintHelper.withTestPage(async helper => {
+    // Set prefs to select a non-default paper size
+    await SpecialPowers.pushPrefEnv({
+      set: [
+        ["print.printer_Mozilla_Save_to_PDF.print_paper_id", "na_ledger"],
+        // paperSizeUnit is millimeters, but the dimensions are correct for inches
+        ["print.printer_Mozilla_Save_to_PDF.print_paper_size_unit", 1],
+        ["print.printer_Mozilla_Save_to_PDF.print_paper_width", "11.0"],
+        ["print.printer_Mozilla_Save_to_PDF.print_paper_height", "17.0"],
+      ],
+    });
+    await helper.startPrint();
+
+    let paperSelect = helper.get("paper-size-picker");
+    is(paperSelect.value, "na_ledger", "The expected paper size is selected");
+
+    // We expect to honor the paperSizeUnit, and convert paperWidth/Height to that unit
+    is(
+      helper.viewSettings.paperId,
+      "na_ledger",
+      "The settings have the expected paperId"
+    );
+    is(
+      helper.viewSettings.paperSizeUnit,
+      helper.settings.kPaperSizeMillimeters,
+      "Check paperSizeUnit"
+    );
+    is(helper.viewSettings.paperWidth.toFixed(1), "279.4", "Check paperWidth");
+    is(
+      helper.viewSettings.paperHeight.toFixed(1),
+      "431.8",
+      "Check paperHeight"
+    );
+
+    await selectPaperOptionWithValue(helper, "iso_a3");
+    is(paperSelect.value, "iso_a3", "The expected paper size is selected");
+    is(
+      helper.viewSettings.paperId,
+      "iso_a3",
+      "The settings have the expected paperId"
+    );
+    is(
+      helper.viewSettings.paperSizeUnit,
+      helper.settings.kPaperSizeMillimeters,
+      "Check paperSizeUnit"
+    );
+    is(helper.viewSettings.paperWidth.toFixed(1), "297.0", "Check paperWidth");
+    is(
+      helper.viewSettings.paperHeight.toFixed(1),
+      "420.0",
+      "Check paperHeight"
+    );
+
+    await SpecialPowers.popPrefEnv();
+    await helper.closeDialog();
+  });
+});