| // Copyright (c) 2015, 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:dart_style/dart_style.dart'; |
| import 'package:dart_style/src/debug.dart' as debug; |
| import 'package:dart_style/src/testing/test_file.dart'; |
| |
| void main(List<String> args) { |
| // Enable debugging so you can see some of the formatter's internal state. |
| // Normal users do not do this. |
| debug.traceChunkBuilder = true; |
| debug.traceLineWriter = true; |
| debug.traceSplitter = true; |
| debug.useAnsiColors = true; |
| debug.tracePieceBuilder = true; |
| debug.traceSolver = true; |
| |
| _formatStmt(''' |
| 1 + 2; |
| '''); |
| |
| _formatUnit(''' |
| class C {} |
| '''); |
| |
| _runTest('other/selection.stmt', 2); |
| } |
| |
| void _formatStmt(String source, {bool tall = true, int pageWidth = 40}) { |
| _runFormatter(source, pageWidth, tall: tall, isCompilationUnit: false); |
| } |
| |
| void _formatUnit(String source, {bool tall = true, int pageWidth = 40}) { |
| _runFormatter(source, pageWidth, tall: tall, isCompilationUnit: true); |
| } |
| |
| void _runFormatter(String source, int pageWidth, |
| {required bool tall, required bool isCompilationUnit}) { |
| try { |
| var formatter = DartFormatter( |
| languageVersion: tall |
| ? DartFormatter.latestLanguageVersion |
| : DartFormatter.latestShortStyleLanguageVersion, |
| pageWidth: pageWidth); |
| |
| String result; |
| if (isCompilationUnit) { |
| result = formatter.format(source); |
| } else { |
| result = formatter.formatStatement(source); |
| } |
| |
| _drawRuler('before', pageWidth); |
| print(source); |
| _drawRuler('after', pageWidth); |
| print(result); |
| } on FormatterException catch (error) { |
| print(error.message()); |
| } |
| } |
| |
| void _drawRuler(String label, int width) { |
| var padding = ' ' * (width - label.length - 1); |
| print('$label:$padding|'); |
| } |
| |
| /// Runs the formatter test starting on [line] at [path] inside the "test" |
| /// directory. |
| Future<void> _runTest(String path, int line, |
| {int pageWidth = 40, bool tall = true}) async { |
| var testFile = await TestFile.read('${tall ? 'tall' : 'short'}/$path'); |
| var formatTest = testFile.tests.firstWhere((test) => test.line == line); |
| |
| var formatter = DartFormatter( |
| languageVersion: formatTest.languageVersion, |
| pageWidth: testFile.pageWidth, |
| indent: formatTest.leadingIndent); |
| |
| var actual = formatter.formatSource(formatTest.input); |
| |
| // The test files always put a newline at the end of the expectation. |
| // Statements from the formatter (correctly) don't have that, so add |
| // one to line up with the expected result. |
| var actualText = actual.textWithSelectionMarkers; |
| if (!testFile.isCompilationUnit) actualText += '\n'; |
| |
| var expectedText = formatTest.output.textWithSelectionMarkers; |
| |
| print('$path ${formatTest.description}'); |
| _drawRuler('before', pageWidth); |
| print(formatTest.input.textWithSelectionMarkers); |
| if (actualText == expectedText) { |
| _drawRuler('result', pageWidth); |
| print(actualText); |
| } else { |
| print('FAIL'); |
| _drawRuler('expected', pageWidth); |
| print(expectedText); |
| _drawRuler('actual', pageWidth); |
| print(actualText); |
| } |
| } |