22 lines
642 B
Dart
22 lines
642 B
Dart
import 'package:combinator/combinator.dart';
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import 'package:test/test.dart';
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import 'common.dart';
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main() {
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var number = chain([
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match(RegExp(r'[0-9]+')).value((r) => int.parse(r.span!.text)),
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match(',').opt(),
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]).first().cast<int>();
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var numbers = number.plus();
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test('sort', () {
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var parser = numbers.sort((a, b) => a!.compareTo(b!));
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expect(parser.parse(scan('21,2,3,34,20')).value, [2, 3, 20, 21, 34]);
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});
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test('reduce', () {
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var parser = numbers.reduce((a, b) => a! + b!);
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expect(parser.parse(scan('21,2,3,34,20')).value, 80);
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expect(parser.parse(scan('not numbers')).value, isNull);
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});
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}
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