Add Fasta tests.

pkg/fasta/test/cascade.dart

Index: pkg/fasta/test/cascade.dart
diff --git a/pkg/fasta/test/cascade.dart b/pkg/fasta/test/cascade.dart
new file mode 100644
index 0000000000000000000000000000000000000000..ac3a782906c2fd8973847c7faa70af39ed1c7373
--- /dev/null
+++ b/pkg/fasta/test/cascade.dart
@@ -0,0 +1,31 @@
+// Copyright (c) 2016, 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.
+
+main() {
+  var list = [1]
+      ..add(2)
+      ..add(3)
+      ..addAll([4, 5]);
+  print(list);
+
+  list
+      ..add(2)
+      ..length
+      ..length = 0;
+  print(list);
+
+  list
+      ..add(2)
+      ..[0]
+      ..[0] = 87;
+
+  print(list);
+
+  list = [[1]]
+      ..first.last.toString()
+      ..first[0].toString()
+      ..[0].last.toString();
+
+  print(list);
+}