pkg/dartdev/test/commands/format_test.dart

// Copyright (c) 2020, 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 'dart:io';

import 'package:test/test.dart';

import '../utils.dart';

void main() {
  group('format', format);
}

void format() {
  TestProject p;

  tearDown(() => p?.dispose());

  test('implicit --help', () {
    p = project();
    var result = p.runSync('format', []);
    expect(result.exitCode, 0);
    expect(result.stderr, isEmpty);
    expect(result.stdout, contains('Format Dart source code.'));
    expect(result.stdout, contains('Usage: dart format [arguments]'));
  });

  test('--help', () {
    p = project();
    var result = p.runSync('format', ['--help']);
    expect(result.exitCode, 0);
    expect(result.stderr, isEmpty);
    expect(result.stdout, contains('Format Dart source code.'));
    expect(result.stdout, contains('Usage: dart format [arguments]'));
  });

  test('unchanged', () {
    p = project(mainSrc: 'int get foo => 1;\n');
    ProcessResult result = p.runSync('format', [p.relativeFilePath]);
    expect(result.exitCode, 0);
    expect(result.stderr, isEmpty);
    expect(result.stdout, startsWith('Unchanged ${p.relativeFilePath}'));
  });

  test('formatted', () {
    p = project(mainSrc: 'int get foo =>       1;\n');
    ProcessResult result = p.runSync('format', [p.relativeFilePath]);
    expect(result.exitCode, 0);
    expect(result.stderr, isEmpty);
    expect(result.stdout, startsWith('Formatted ${p.relativeFilePath}'));
  });

  test('dry-run changes', () {
    p = project(mainSrc: 'int get foo =>       1;\n');
    ProcessResult result =
        p.runSync('format', ['--dry-run', p.relativeFilePath]);
    expect(result.exitCode, 0);
    expect(result.stderr, isEmpty);
    expect(result.stdout, startsWith(p.relativeFilePath));
  });

  test('dry-run no changes', () {
    p = project(mainSrc: 'int get foo => 1;\n');
    ProcessResult result =
        p.runSync('format', ['--dry-run', p.relativeFilePath]);
    expect(result.exitCode, 0);
    expect(result.stderr, isEmpty);
    expect(result.stdout, isEmpty);
  });

  test('unknown file', () {
    p = project(mainSrc: 'int get foo => 1;\n');
    var unknownFilePath = p.relativeFilePath + '-unknown-file.dart';
    ProcessResult result = p.runSync('format', [unknownFilePath]);
    expect(result.exitCode, 0);
    expect(result.stderr,
        startsWith('No file or directory found at "${unknownFilePath}".'));
    expect(result.stdout, isEmpty);
  });
}