61 lines
2.0 KiB
Dart
61 lines
2.0 KiB
Dart
// 唯一值得单测的东西：原生异常有没有被挡在包边界内（07 §使用规则）。
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import 'package:flutter/services.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:native_scan/native_scan.dart';
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import 'package:native_scan/src/generated/scan_api.g.dart';
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// pigeon 给 @HostApi 生成的是具体类（内部持有 BinaryMessenger），
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// 所以这里只能 extends 覆写方法，不能 implements。
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class _ThrowingApi extends ScanHostApi {
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_ThrowingApi(this.error);
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final Object error;
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@override
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Future<ScanResult> startScan(ScanOptions options) => Future<ScanResult>.error(error);
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@override
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Future<bool> isModeSupported(ScanMode mode) => Future<bool>.error(error);
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}
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void main() {
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final ScanOptions options = ScanOptions(mode: ScanMode.barcode);
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test('PlatformException 被转成 NativeScanException，原生类型不外泄', () async {
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final NativeScan scan = NativeScan(
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api: _ThrowingApi(PlatformException(code: 'CANCELLED', message: '用户取消')),
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);
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await expectLater(
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scan.startScan(options),
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throwsA(
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isA<NativeScanException>()
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.having((NativeScanException e) => e.code, 'code', NativeScanErrorCode.cancelled)
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.having((NativeScanException e) => e.isCancelled, 'isCancelled', isTrue),
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),
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);
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});
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test('原生未实现时抛 UNSUPPORTED_PLATFORM，而不是静默返回', () async {
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final NativeScan scan = NativeScan(api: _ThrowingApi(MissingPluginException()));
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await expectLater(
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scan.startScan(options),
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throwsA(
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isA<NativeScanException>().having(
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(NativeScanException e) => e.code,
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'code',
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NativeScanErrorCode.unsupportedPlatform,
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),
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),
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);
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});
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test('isModeSupported 出错时降级为 false，调用方据此隐藏入口', () async {
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final NativeScan scan = NativeScan(api: _ThrowingApi(MissingPluginException()));
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expect(await scan.isModeSupported(ScanMode.plate), isFalse);
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});
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}
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