Import rasta tests.

pkg/fasta/test/rasta/issue_000070.dart

+// 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.md file.
+
+import "package:expect/expect.dart";
+
+class A<N, S, U> {
+  final List<U> field;
+
+  A(N n, S s) : field = new List<U>() {
+    Expect.isTrue(n is N);
+    Expect.isTrue(s is S);
+  }
+
+  A.empty() : field = null{}
+
+  factory A.f(S s) {
+    Expect.isTrue(s is S);
+    return new A.empty();
+  }
+
+  const A.c(U u, S s) : field = const [null];
+
+  List<U> get getter {
+    return field;
+  }
+
+  void set setter(S s){}
+}
+
+abstract class J<Aa, B>{}
+
+abstract class I<H, C, K> extends J<C, K>
+{ }
+
+
+main() {
+  new A<num, double, List>(1, 2.0);
+  A a = new A<int, int, int>.f(1);
+  const A<int, int, List>.c(const[], 1);
+
+  var z = a.getter;
+  a.setter = 1;
+}