dart/pkg/analyzer/test/error_test.dart

// 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.

library test.error;

import 'package:unittest/unittest.dart';

import 'utils.dart';

void main() {
  test("a valid Dart file doesn't throw any errors", () {
    expect(errorsForFile('void main() => print("Hello, world!");'), isNull);
  });

  test("an empty Dart file doesn't throw any errors", () {
    expect(errorsForFile(''), isNull);
  });

  test("an error on the first line", () {
    expect(errorsForFile('void foo;\n'),
        equals("Error in test.dart: Variables cannot have a type of 'void'\n"));
  });

  test("an error on the last line", () {
    expect(errorsForFile('\nvoid foo;'),
        equals("Error in test.dart: Variables cannot have a type of 'void'\n"));
  });

  test("an error in the middle", () {
    expect(errorsForFile('\nvoid foo;\n'),
        equals("Error in test.dart: Variables cannot have a type of 'void'\n"));
  });

  var veryLongString = new List.filled(107, ' ').join('');

  test("an error at the end of a very long line", () {
    expect(errorsForFile('$veryLongString     void foo;'),
        equals("Error in test.dart: Variables cannot have a type of 'void'\n"));
  });

  test("an error at the beginning of a very long line", () {
    expect(errorsForFile('void foo;     $veryLongString'),
        equals("Error in test.dart: Variables cannot have a type of 'void'\n"));
  });

  test("an error in the middle of a very long line", () {
    expect(errorsForFile('$veryLongString void foo;$veryLongString'),
        equals("Error in test.dart: Variables cannot have a type of 'void'\n"));
  });
}