Make pub publish more user friendly:

utils/tests/pub/path/path_posix_test.dart

 // Copyright (c) 2012, 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 path_test;
 
 import 'dart:io' as io;
 
 import '../../../../pkg/unittest/lib/unittest.dart';
 import '../../../pub/path.dart' as path;
@@ skipping 247 matching lines @@
       expect(builder.resolve(r'a\', 'b'), r'/root/path/a\/b');
     });
 
     test('ignores parts before an absolute path', () {
       expect(builder.resolve('a', '/b', '/c', 'd'), '/c/d');
       expect(builder.resolve('a', r'c:\b', 'c', 'd'), r'/root/path/a/c:\b/c/d');
       expect(builder.resolve('a', r'\\b', 'c', 'd'), r'/root/path/a/\\b/c/d');
     });
   });
 
+  group('split', () {
+    test('splits out directories', () {
+      expect(builder.split(''), []);
+      expect(builder.split('a'), ['a']);
+      expect(builder.split('a/b/c.txt'), ['a', 'b', 'c.txt']);
+    });
+
+    test('does not normalize', () {
+      expect(builder.split('.'), ['.']);
+      expect(builder.split('..'), ['..']);
+      expect(builder.split('a/b/../c/./d'), ['a', 'b', '..', 'c', '.', 'd']);
+    });
+
+    test('collapses empty parts', () {
+      expect(builder.split('a//b///c'), ['a', 'b', 'c']);
+    });
+
+    test('includes the root prefix in the first part', () {
+      expect(builder.split('/'), ['/']);
+      expect(builder.split('/a/b/c'), ['/a', 'b', 'c']);
+    });
+  });
+
   test('withoutExtension', () {
     expect(builder.withoutExtension(''), '');
     expect(builder.withoutExtension('a'), 'a');
     expect(builder.withoutExtension('.a'), '.a');
     expect(builder.withoutExtension('a.b'), 'a');
     expect(builder.withoutExtension('a/b.c'), 'a/b');
     expect(builder.withoutExtension('a/b.c.d'), 'a/b.c');
     expect(builder.withoutExtension('a/'), 'a/');
     expect(builder.withoutExtension('a/b/'), 'a/b/');
     expect(builder.withoutExtension('a/.'), 'a/.');
     expect(builder.withoutExtension('a/.b'), 'a/.b');
     expect(builder.withoutExtension('a.b/c'), 'a.b/c');
     expect(builder.withoutExtension(r'a.b\c'), r'a');
     expect(builder.withoutExtension(r'a/b\c'), r'a/b\c');
     expect(builder.withoutExtension(r'a/b\c.d'), r'a/b\c');
   });
 }