packages/image_picker/image_picker_windows/test/image_picker_windows_test.dart

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:file_selector_platform_interface/file_selector_platform_interface.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:image_picker_platform_interface/image_picker_platform_interface.dart';
import 'package:image_picker_windows/image_picker_windows.dart';
import 'package:mockito/annotations.dart';
import 'package:mockito/mockito.dart';

import 'image_picker_windows_test.mocks.dart';

@GenerateMocks(<Type>[FileSelectorPlatform])
void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  // Returns the captured type groups from a mock call result, assuming that
  // exactly one call was made and only the type groups were captured.
  List<XTypeGroup> capturedTypeGroups(VerificationResult result) {
    return result.captured.single as List<XTypeGroup>;
  }

  group('ImagePickerWindows', () {
    late ImagePickerWindows plugin;
    late MockFileSelectorPlatform mockFileSelectorPlatform;

    setUp(() {
      plugin = ImagePickerWindows();
      mockFileSelectorPlatform = MockFileSelectorPlatform();

      when(mockFileSelectorPlatform.openFile(
              acceptedTypeGroups: anyNamed('acceptedTypeGroups')))
          .thenAnswer((_) async => null);

      when(mockFileSelectorPlatform.openFiles(
              acceptedTypeGroups: anyNamed('acceptedTypeGroups')))
          .thenAnswer((_) async => List<XFile>.empty());

      ImagePickerWindows.fileSelector = mockFileSelectorPlatform;
    });

    test('registered instance', () {
      ImagePickerWindows.registerWith();
      expect(ImagePickerPlatform.instance, isA<ImagePickerWindows>());
    });

    group('images', () {
      test('pickImage passes the accepted type groups correctly', () async {
        await plugin.pickImage(source: ImageSource.gallery);

        final VerificationResult result = verify(
            mockFileSelectorPlatform.openFile(
                acceptedTypeGroups: captureAnyNamed('acceptedTypeGroups')));
        expect(capturedTypeGroups(result)[0].extensions,
            ImagePickerWindows.imageFormats);
      });

      test('getImage passes the accepted type groups correctly', () async {
        await plugin.getImage(source: ImageSource.gallery);

        final VerificationResult result = verify(
            mockFileSelectorPlatform.openFile(
                acceptedTypeGroups: captureAnyNamed('acceptedTypeGroups')));
        expect(capturedTypeGroups(result)[0].extensions,
            ImagePickerWindows.imageFormats);
      });

      test('getMultiImage passes the accepted type groups correctly', () async {
        await plugin.getMultiImage();

        final VerificationResult result = verify(
            mockFileSelectorPlatform.openFiles(
                acceptedTypeGroups: captureAnyNamed('acceptedTypeGroups')));
        expect(capturedTypeGroups(result)[0].extensions,
            ImagePickerWindows.imageFormats);
      });

      test(
          'getImageFromSource throws StateError when source is camera with no delegate',
          () async {
        await expectLater(plugin.getImageFromSource(source: ImageSource.camera),
            throwsStateError);
      });

      test('getMultiImage passes the accepted type groups correctly', () async {
        await plugin.getMultiImage();

        final VerificationResult result = verify(
            mockFileSelectorPlatform.openFiles(
                acceptedTypeGroups: captureAnyNamed('acceptedTypeGroups')));
        expect(capturedTypeGroups(result)[0].extensions,
            ImagePickerWindows.imageFormats);
      });
    });

    group('videos', () {
      test('pickVideo passes the accepted type groups correctly', () async {
        await plugin.pickVideo(source: ImageSource.gallery);

        final VerificationResult result = verify(
            mockFileSelectorPlatform.openFile(
                acceptedTypeGroups: captureAnyNamed('acceptedTypeGroups')));
        expect(capturedTypeGroups(result)[0].extensions,
            ImagePickerWindows.videoFormats);
      });

      test('getVideo passes the accepted type groups correctly', () async {
        await plugin.getVideo(source: ImageSource.gallery);

        final VerificationResult result = verify(
            mockFileSelectorPlatform.openFile(
                acceptedTypeGroups: captureAnyNamed('acceptedTypeGroups')));
        expect(capturedTypeGroups(result)[0].extensions,
            ImagePickerWindows.videoFormats);
      });

      test('getVideo calls delegate when source is camera', () async {
        const String fakePath = '/tmp/foo';
        plugin.cameraDelegate = FakeCameraDelegate(result: XFile(fakePath));
        expect((await plugin.getVideo(source: ImageSource.camera))!.path,
            fakePath);
      });

      test('getVideo throws StateError when source is camera with no delegate',
          () async {
        await expectLater(
            plugin.getVideo(source: ImageSource.camera), throwsStateError);
      });
    });

    group('media', () {
      test('getMedia passes the accepted type groups correctly', () async {
        await plugin.getMedia(options: const MediaOptions(allowMultiple: true));

        final VerificationResult result = verify(
            mockFileSelectorPlatform.openFiles(
                acceptedTypeGroups: captureAnyNamed('acceptedTypeGroups')));
        expect(capturedTypeGroups(result)[0].extensions, <String>[
          ...ImagePickerWindows.imageFormats,
          ...ImagePickerWindows.videoFormats
        ]);
      });

      test('multiple media handles an empty path response gracefully',
          () async {
        expect(
            await plugin.getMedia(
              options: const MediaOptions(
                allowMultiple: true,
              ),
            ),
            <String>[]);
      });

      test('single media handles an empty path response gracefully', () async {
        expect(
            await plugin.getMedia(
              options: const MediaOptions(
                allowMultiple: false,
              ),
            ),
            <String>[]);
      });
    });
  });
}

class FakeCameraDelegate extends ImagePickerCameraDelegate {
  FakeCameraDelegate({this.result});

  XFile? result;

  @override
  Future<XFile?> takePhoto(
      {ImagePickerCameraDelegateOptions options =
          const ImagePickerCameraDelegateOptions()}) async {
    return result;
  }

  @override
  Future<XFile?> takeVideo(
      {ImagePickerCameraDelegateOptions options =
          const ImagePickerCameraDelegateOptions()}) async {
    return result;
  }
}