blob: 91397c01b7a8d8ffe5e5626aa1999ff66ea3c282 [file] [log] [blame]
// Copyright (c) 2013, 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:source_span/src/utils.dart';
import 'package:test/test.dart';
void main() {
group('find line start', () {
test('skip entries in wrong column', () {
const context = '0_bb\n1_bbb\n2b____\n3bbb\n';
final index = findLineStart(context, 'b', 1)!;
expect(index, 11);
expect(context.substring(index - 1, index + 3), '\n2b_');
});
test('end of line column for empty text', () {
const context = '0123\n56789\nabcdefgh\n';
final index = findLineStart(context, '', 5)!;
expect(index, 5);
expect(context[index], '5');
});
test('column at the end of the file for empty text', () {
var context = '0\n2\n45\n';
var index = findLineStart(context, '', 2)!;
expect(index, 4);
expect(context[index], '4');
context = '0\n2\n45';
index = findLineStart(context, '', 2)!;
expect(index, 4);
});
test('empty text in empty context', () {
final index = findLineStart('', '', 0);
expect(index, 0);
});
test('found on the first line', () {
const context = '0\n2\n45\n';
final index = findLineStart(context, '0', 0);
expect(index, 0);
});
test('finds text that starts with a newline', () {
const context = '0\n2\n45\n';
final index = findLineStart(context, '\n2', 1);
expect(index, 0);
});
test('not found', () {
const context = '0\n2\n45\n';
final index = findLineStart(context, '0', 1);
expect(index, isNull);
});
});
}