Unit Testing

[SchrodingersGat]

Hi @khoren93 I am wondering if there is a way to run unit tests on known images, as a way to ensure that the barcode scanning functionality does not "regress" across release cycles.

For reference, I am using this library in https://github.com/inventree/inventree-app/

And trying to run the following code in a unit test:

/*
 * Helper function to read a barcode from an image file
 */
Future<zxing.Code> readBarcodeFromImage(String path) async {

  // Load file from provided path
  final XFile imageFile = XFile("test_resources/$path");

  final zxing.DecodeParams params = zxing.DecodeParams(
    imageFormat: zxing.ImageFormat.rgb,
    tryHarder: true,
    tryRotate: true,
    tryInverted: true,
    isMultiScan: false,
  );

  final zxing.Code code = await zxing.zxingReadBarcodeImagePath(imageFile, params);

  debugDefaultTargetPlatformOverride = null;

  return code;
}

void main() {

  TestWidgetsFlutterBinding.ensureInitialized();

  group("Test Barcodes:", () {

    debugDefaultTargetPlatformOverride = TargetPlatform.android;

    test("Code-39", () async {
      final zxing.Code code = await readBarcodeFromImage("code-39.png");

      expect(code, isNotNull);
      expect(code.text, "012345678905");
    });

  });
}

However, I run into this error, I believe because the test is being run on a windows machine, and not respecting the target platform (Android) in this case?

  Invalid argument(s): Failed to load dynamic library 'flutter_zxing.dll': The specified module could not be found.
   (error code: 126)
  dart:ffi                                                   new DynamicLibrary.open
  package:flutter_zxing/src/logic/bindings.dart 10:27        _openDynamicLibrary
  package:flutter_zxing/src/logic/bindings.dart 15:24        dylib
  package:flutter_zxing/src/logic/bindings.dart              dylib
  package:flutter_zxing/src/logic/bindings.dart 3:54         bindings
  package:flutter_zxing/src/logic/bindings.dart              bindings
  package:flutter_zxing/src/logic/barcode_reader.dart 40:5   _readBarcode
  package:flutter_zxing/src/logic/barcode_reader.dart 37:5   zxingReadBarcode
  package:flutter_zxing/src/logic/barcode_reader.dart 18:10  zxingReadBarcodeImagePath