ImageProcess/native_vision/test/native_vision_test.dart

import 'package:flutter_test/flutter_test.dart';
import 'package:native_vision/native/native_vision.dart';
import 'package:native_vision/native_vision_platform_interface.dart';
import 'package:native_vision/native_vision_method_channel.dart';
import 'package:plugin_platform_interface/plugin_platform_interface.dart';

class MockNativeVisionPlatform
    with MockPlatformInterfaceMixin
    implements NativeVisionPlatform {
  @override
  Future<String?> getPlatformVersion() => Future.value('42');
}

void main() {
  final NativeVisionPlatform initialPlatform = NativeVisionPlatform.instance;

  test('$MethodChannelNativeVision is the default instance', () {
    expect(initialPlatform, isInstanceOf<MethodChannelNativeVision>());
  });

  test('getPlatformVersion', () async {
    NativeVision nativeVisionPlugin = NativeVision();
    MockNativeVisionPlatform fakePlatform = MockNativeVisionPlatform();
    NativeVisionPlatform.instance = fakePlatform;

    expect(await nativeVisionPlugin.getPlatformVersion(), '42');
  });
}