Add Fasta tests.

pkg/fasta/test/fibonacci.dart

Index: pkg/fasta/test/fibonacci.dart
diff --git a/pkg/fasta/test/fibonacci.dart b/pkg/fasta/test/fibonacci.dart
new file mode 100644
index 0000000000000000000000000000000000000000..e1ab1d5d4d110fe2d416d6dc8da32804a4d6a793
--- /dev/null
+++ b/pkg/fasta/test/fibonacci.dart
@@ -0,0 +1,14 @@
+// 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.
+
+int fibonacci(int n) {
+  if (n < 2) return n;
+  return fibonacci(n - 1) + fibonacci(n - 2);
+}
+
+main() {
+  for (int i = 0; i < 20; i++) {
+    print(fibonacci(i));
+  }
+}