Import rasta tests.

pkg/fasta/test/rasta/class_hierarchy.dart.dartk.expect

+library;
+import self as self;
+import "dart:core" as core;
+
+class A extends core::Object {
+  constructor •() → self::A
+    : invalid-initializer;
+}
+class B extends core::Object {
+  constructor •() → self::B
+    : invalid-initializer;
+}
+class C extends core::Object {
+  constructor •() → dynamic
+    : invalid-initializer;
+}
+class D extends core::Object {
+  static factory •() → self::D
+    invalid-statement;
+}
+static method main() → void {
+  new self::A::•();
+  new self::B::•();
+  new self::C::•();
+  invalid-expression.call();
+}