Update charted to 0.4.8 and roll

packages/which/test/is_executable_test.dart

-
-library which.test.is_executable;
-
-import 'dart:io';
-
-import 'package:mockito/mockito.dart';
-import 'package:unittest/unittest.dart';
-import 'package:which/src/is_executable.dart';
-
-import 'util.dart';
-
-main() {
-  group('isExecutableStat', () {
-    test('false if not a file', () {
-
-      var stat = new MockFileStat();
-
-      // A directory.
-      when(stat.type).thenReturn(FileSystemEntityType.DIRECTORY);
-
-      var result = isExecutableStat(stat, false);
-
-      expect(result, isFalse);
-
-      verifyNever(stat.mode);
-    });
-
-    test('true for all files on windows', () {
-
-      var stat = new MockFileStat();
-
-      // A file.
-      when(stat.type).thenReturn(FileSystemEntityType.FILE);
-
-      var result = isExecutableStat(stat, true);
-
-      expect(result, isTrue);
-
-      verifyNever(stat.mode);
-    });
-
-    test('true if has world execute permission', () {
-      var result = isExecutableStat(_getMockFileStat('000000000001'), false);
-      expect(result, isTrue);
-    });
-
-    test('true if has group execute permission', () {
-      var result = isExecutableStat(_getMockFileStat('000000001000'), false);
-      expect(result, isTrue);
-    });
-
-    test('true if has owner execute permission', () {
-      var result = isExecutableStat(_getMockFileStat('000001000000'), false);
-      expect(result, isTrue);
-    });
-
-    test('false if has no execute permissions', () {
-      var result = isExecutableStat(_getMockFileStat('111110110110'), false);
-      expect(result, isFalse);
-    });
-  });
-}
-
-MockFileStat _getMockFileStat(String mode) {
-  var stat = new MockFileStat();
-
-  // A file.
-  when(stat.type).thenReturn(FileSystemEntityType.FILE);
-
-  // Last bit is world execute.
-  when(stat.mode).thenReturn(int.parse(mode, radix: 2));
-
-  return stat;
-}