nweiz@google.com
35a0b4fd6c
This also adds support for [StringScanner.error], which produces a nicely-formatted scanning error. R=kevmoo@google.com Review URL: https://codereview.chromium.org//222843003 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@34669 260f80e4-7a28-3924-810f-c04153c831b5
105 lines
2.9 KiB
Dart
105 lines
2.9 KiB
Dart
// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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library string_scanner.expect_error_test;
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import 'package:string_scanner/string_scanner.dart';
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import 'package:unittest/unittest.dart';
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import 'utils.dart';
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void main() {
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test('points to the first unconsumed character', () {
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var scanner = new StringScanner('foo bar baz');
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scanner.expect('foo ');
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expect(() => scanner.expect('foo'), throwsFormattedError('''
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Error on line 1, column 5: expected "foo".
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foo bar baz
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^'''));
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});
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test('prints the correct line', () {
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var scanner = new StringScanner('foo bar baz\ndo re mi\nearth fire water');
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scanner.expect('foo bar baz\ndo ');
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expect(() => scanner.expect('foo'), throwsFormattedError('''
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Error on line 2, column 4: expected "foo".
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do re mi
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^'''));
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});
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test('handles the beginning of the string correctly', () {
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var scanner = new StringScanner('foo bar baz');
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expect(() => scanner.expect('zap'), throwsFormattedError('''
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Error on line 1, column 1: expected "zap".
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foo bar baz
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^'''));
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});
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test('handles the end of the string correctly', () {
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var scanner = new StringScanner('foo bar baz');
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scanner.expect('foo bar baz');
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expect(() => scanner.expect('bang'), throwsFormattedError('''
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Error on line 1, column 12: expected "bang".
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foo bar baz
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^'''));
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});
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test('handles an empty string correctly', () {
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expect(() => new StringScanner('').expect('foo'), throwsFormattedError('''
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Error on line 1, column 1: expected "foo".
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^'''));
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});
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group("expected name", () {
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test("uses the provided name", () {
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expect(() => new StringScanner('').expect('foo bar', name: 'zap'),
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throwsFormattedError('''
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Error on line 1, column 1: expected zap.
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^'''));
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});
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test("escapes string quotes", () {
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expect(() => new StringScanner('').expect('foo"bar'),
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throwsFormattedError('''
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Error on line 1, column 1: expected "foo\\"bar".
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^'''));
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});
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test("escapes string backslashes", () {
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expect(() => new StringScanner('').expect('foo\\bar'),
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throwsFormattedError('''
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Error on line 1, column 1: expected "foo\\\\bar".
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^'''));
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});
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test("prints PERL-style regexps", () {
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expect(() => new StringScanner('').expect(new RegExp(r'foo')),
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throwsFormattedError('''
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Error on line 1, column 1: expected /foo/.
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^'''));
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});
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test("escape regexp forward slashes", () {
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expect(() => new StringScanner('').expect(new RegExp(r'foo/bar')),
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throwsFormattedError('''
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Error on line 1, column 1: expected /foo\\/bar/.
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^'''));
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});
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test("does not escape regexp backslashes", () {
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expect(() => new StringScanner('').expect(new RegExp(r'foo\bar')),
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throwsFormattedError('''
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Error on line 1, column 1: expected /foo\\bar/.
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^'''));
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});
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});
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}
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