Make pub publish more user friendly:

utils/tests/pub/path/path_windows_test.dart

Index: utils/tests/pub/path/path_windows_test.dart
diff --git a/utils/tests/pub/path/path_windows_test.dart b/utils/tests/pub/path/path_windows_test.dart
index 1861a675b981ccdf723b6bea0b375bf6db159b96..b8dae382aa04e4551ad8059191d77544408178cb 100644
--- a/utils/tests/pub/path/path_windows_test.dart
+++ b/utils/tests/pub/path/path_windows_test.dart
@@ -291,6 +291,30 @@ main() {
     });
   });
 
+  group('split', () {
+    test('splits out directories', () {
+      expect(builder.split(''), []);
+      expect(builder.split('a'), ['a']);
+      expect(builder.split(r'a\b/c.txt'), ['a', 'b', 'c.txt']);
+    });
+
+    test('does not normalize', () {
+      expect(builder.split('.'), ['.']);
+      expect(builder.split('..'), ['..']);
+      expect(builder.split(r'a\b/..\c/.\d'), ['a', 'b', '..', 'c', '.', 'd']);
+    });
+
+    test('collapses empty parts', () {
+      expect(builder.split(r'a\\b\\\c'), ['a', 'b', 'c']);
+    });
+
+    test('includes the root prefix in the first part', () {
+      expect(builder.split(r'C:/a'), ['C:/a']);
+      expect(builder.split(r'C:\a\b\c'), [r'C:\a', 'b', 'c']);
+      // TODO(rnystrom): Test UNC paths.
+    });
+  });
+
   test('withoutExtension', () {
     expect(builder.withoutExtension(''), '');
     expect(builder.withoutExtension('a'), 'a');