Handle comparison of empty URIs (sdk/24126).

pkg/analyzer/test/generated/source_factory_test.dart

Index: pkg/analyzer/test/generated/source_factory_test.dart
diff --git a/pkg/analyzer/test/generated/source_factory_test.dart b/pkg/analyzer/test/generated/source_factory_test.dart
index e3ed1deeeba1599f670faf071c0e58c57491fcfc..c16f1f8f6e31aea1429bf116fc35cd25d3c503db 100644
--- a/pkg/analyzer/test/generated/source_factory_test.dart
+++ b/pkg/analyzer/test/generated/source_factory_test.dart
@@ -182,6 +182,9 @@ foo:http://www.google.com
             isTrue);
         expect(utils.startsWith(Uri.parse('/foo/bar'), Uri.parse('/foo/b')),
             isFalse);
+        // Handle odd URIs (https://github.com/dart-lang/sdk/issues/24126)
+        expect(utils.startsWith(Uri.parse('/foo/bar'), Uri.parse('')), isFalse);
+        expect(utils.startsWith(Uri.parse(''), Uri.parse('/foo/bar')), isFalse);
       });
     });
   });