| // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
| // for details. 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:string_scanner/string_scanner.dart'; |
| import 'package:test/test.dart'; |
| |
| import 'utils.dart'; |
| |
| void main() { |
| test('defaults to the last match', () { |
| final scanner = StringScanner('foo bar baz'); |
| scanner.expect('foo '); |
| scanner.expect('bar'); |
| expect(() => scanner.error('oh no!'), throwsStringScannerException('bar')); |
| }); |
| |
| group('with match', () { |
| test('supports an earlier match', () { |
| final scanner = StringScanner('foo bar baz'); |
| scanner.expect('foo '); |
| final match = scanner.lastMatch; |
| scanner.expect('bar'); |
| expect(() => scanner.error('oh no!', match: match), |
| throwsStringScannerException('foo ')); |
| }); |
| |
| test('supports a match on a previous line', () { |
| final scanner = StringScanner('foo bar baz\ndo re mi\nearth fire water'); |
| scanner.expect('foo bar baz\ndo '); |
| scanner.expect('re'); |
| final match = scanner.lastMatch; |
| scanner.expect(' mi\nearth '); |
| expect(() => scanner.error('oh no!', match: match), |
| throwsStringScannerException('re')); |
| }); |
| |
| test('supports a multiline match', () { |
| final scanner = StringScanner('foo bar baz\ndo re mi\nearth fire water'); |
| scanner.expect('foo bar '); |
| scanner.expect('baz\ndo'); |
| final match = scanner.lastMatch; |
| scanner.expect(' re mi'); |
| expect(() => scanner.error('oh no!', match: match), |
| throwsStringScannerException('baz\ndo')); |
| }); |
| |
| test('supports a match after position', () { |
| final scanner = StringScanner('foo bar baz'); |
| scanner.expect('foo '); |
| scanner.expect('bar'); |
| final match = scanner.lastMatch; |
| scanner.position = 0; |
| expect(() => scanner.error('oh no!', match: match), |
| throwsStringScannerException('bar')); |
| }); |
| }); |
| |
| group('with position and/or length', () { |
| test('defaults to length 0', () { |
| final scanner = StringScanner('foo bar baz'); |
| scanner.expect('foo '); |
| expect(() => scanner.error('oh no!', position: 1), |
| throwsStringScannerException('')); |
| }); |
| |
| test('defaults to the current position', () { |
| final scanner = StringScanner('foo bar baz'); |
| scanner.expect('foo '); |
| expect(() => scanner.error('oh no!', length: 3), |
| throwsStringScannerException('bar')); |
| }); |
| |
| test('supports an earlier position', () { |
| final scanner = StringScanner('foo bar baz'); |
| scanner.expect('foo '); |
| expect(() => scanner.error('oh no!', position: 1, length: 2), |
| throwsStringScannerException('oo')); |
| }); |
| |
| test('supports a position on a previous line', () { |
| final scanner = StringScanner('foo bar baz\ndo re mi\nearth fire water'); |
| scanner.expect('foo bar baz\ndo re mi\nearth'); |
| expect(() => scanner.error('oh no!', position: 15, length: 2), |
| throwsStringScannerException('re')); |
| }); |
| |
| test('supports a multiline length', () { |
| final scanner = StringScanner('foo bar baz\ndo re mi\nearth fire water'); |
| scanner.expect('foo bar baz\ndo re mi\nearth'); |
| expect(() => scanner.error('oh no!', position: 8, length: 8), |
| throwsStringScannerException('baz\ndo r')); |
| }); |
| |
| test('supports a position after the current one', () { |
| final scanner = StringScanner('foo bar baz'); |
| expect(() => scanner.error('oh no!', position: 4, length: 3), |
| throwsStringScannerException('bar')); |
| }); |
| |
| test('supports a length of zero', () { |
| final scanner = StringScanner('foo bar baz'); |
| expect(() => scanner.error('oh no!', position: 4, length: 0), |
| throwsStringScannerException('')); |
| }); |
| }); |
| |
| group('argument errors', () { |
| late StringScanner scanner; |
| setUp(() { |
| scanner = StringScanner('foo bar baz'); |
| scanner.scan('foo'); |
| }); |
| |
| test('if match is passed with position', () { |
| expect( |
| () => scanner.error('oh no!', match: scanner.lastMatch, position: 1), |
| throwsArgumentError); |
| }); |
| |
| test('if match is passed with length', () { |
| expect(() => scanner.error('oh no!', match: scanner.lastMatch, length: 1), |
| throwsArgumentError); |
| }); |
| |
| test('if position is negative', () { |
| expect(() => scanner.error('oh no!', position: -1), throwsArgumentError); |
| }); |
| |
| test('if position is outside the string', () { |
| expect(() => scanner.error('oh no!', position: 100), throwsArgumentError); |
| }); |
| |
| test('if position + length is outside the string', () { |
| expect(() => scanner.error('oh no!', position: 7, length: 7), |
| throwsArgumentError); |
| }); |
| |
| test('if length is negative', () { |
| expect(() => scanner.error('oh no!', length: -1), throwsArgumentError); |
| }); |
| }); |
| } |