Barcode Detection Mac: Accept barcode format hint in detector constructor.

shape-detection/detection-options.html

@@ -23,4 +23,44 @@
   assert_equals(mock.getFastMode(), true, "maxDetectedFaces");
 }, "Test that FaceDetectionOptions are correctly propagated");
 
+detection_test("BarcodeDetectionTest", async (t, detectionTest) => {
+  const img = document.getElementById("img");
+  const mock = detectionTest.MockBarcodeDetectionProvider();
+
+  const detectorWithNoOptions = new BarcodeDetector();
+  let barcodeDetectionResult = await detectorWithNoOptions.detect(img);
+  assert_array_equals(mock.getFormats(), [], "formats");
+
+  const detectorWithOptions = new BarcodeDetector({
+      formats: ["code_128", "qr_code"]});
+  barcodeDetectionResult = await detectorWithOptions.detect(img);
+  assert_array_equals(
+      mock.getFormats(),
+      [shapeDetection.mojom.BarcodeFormat.CODE_128,
+       shapeDetection.mojom.BarcodeFormat.QR_CODE],
+      "formats");
+
+  try {
+    new BarcodeDetector({formats: []});
+    assert_unreached("providing hint option that is empty should fail");
+  } catch (error) {
+    assert_equals(error.name, "TypeError");
+  }
+
+  try {
+    new BarcodeDetector({formats: ["unknown"]});
+    assert_unreached("providing \"unknown\" as a hint option should fail");
+  } catch (error) {
+    assert_equals(error.name, "TypeError");
+  }
+
+  try {
+    new BarcodeDetector({formats: ["foo", "bar"]});
+    assert_unreached(
+        "providing hint option with unrecognized formats should fail");
+  } catch (error) {
+    assert_equals(error.name, "TypeError");
+  }
+}, "Test that BarcodeDetectorOptions are correctly propagated");
+
 </script>