Migrate language_2/unsorted to NNBD.

Change-Id: Iad2963c7f9c184b089dc6d15aa4442f58d194bc2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151983
Reviewed-by: Nicholas Shahan <nshahan@google.com>
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Auto-Submit: Bob Nystrom <rnystrom@google.com>

tests/language/unsorted/ackermann_test.dart

@@ -0,0 +1,22 @@
+// Copyright (c) 2011, 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.
+// Dart version of two-argument Ackermann-Peter function.
+
+import "package:expect/expect.dart";
+
+class AckermannTest {
+  static int ack(int m, int n) {
+    return m == 0
+        ? n + 1
+        : ((n == 0) ? ack(m - 1, 1) : ack(m - 1, ack(m, n - 1)));
+  }
+
+  static testMain() {
+    Expect.equals(253, ack(3, 5));
+  }
+}
+
+main() {
+  AckermannTest.testMain();
+}

tests/language/unsorted/additional_interface_adds_optional_args_concrete_test.dart

@@ -0,0 +1,24 @@
+// Copyright (c) 2017, 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.
+
+class A {
+  void foo() {}
+}
+
+abstract class I {
+  void foo([x]);
+}
+
+class /*@compile-error=unspecified*/ B extends A implements I {
+  // This class declaration violates soundness, since it allows `new
+  // B().foo(42)`, which would lead to invalid arguments being passed to A.foo.
+}
+
+void f(B b) {
+  b.foo();
+}
+
+main() {
+  f(new B());
+}

tests/language/unsorted/additional_interface_adds_optional_args_test.dart

@@ -0,0 +1,36 @@
+// Copyright (c) 2017, 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.
+
+// This test exercises a corner case of override checking that is safe from a
+// soundness perspective, but which we haven't decided whether or not to allow
+// from a usability perspective.
+
+class A {
+  void foo() {}
+}
+
+abstract class I {
+  void foo([x]);
+}
+
+abstract class B extends A implements I {
+  // If this class were concrete, there would be a problem, since `new
+  // B().foo(42)` would be statically allowed, but would lead to invalid
+  // arguments being passed to A.foo.  But since the class is abstract, there is
+  // no problem.
+}
+
+class C extends B {
+  void foo([x]) {
+    super.foo();
+  }
+}
+
+void f(B b) {
+  b.foo(42);
+}
+
+main() {
+  f(new C());
+}

tests/language/unsorted/allocate_large_object_test.dart

@@ -0,0 +1,46 @@
+// Copyright (c) 2011, 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.
+
+import "package:expect/expect.dart";
+
+class A {
+  int a;
+  double? d1;
+  double? d2;
+  double? d3;
+  double? d4;
+  double? d5;
+  double? d6;
+  double? d7;
+  double? d8;
+  double? d9;
+  double? d10;
+  double? d11;
+  double? d12;
+  double? d13;
+  double? d14;
+  static var s;
+
+  static foo() {
+    return s;
+  }
+
+  A(this.a) {}
+
+  value() {
+    return a + foo();
+  }
+}
+
+class AllocateLargeObject {
+  static testMain() {
+    var a = new A(1);
+    A.s = 4;
+    Expect.equals(5, a.value());
+  }
+}
+
+main() {
+  AllocateLargeObject.testMain();
+}

tests/language/unsorted/allocate_test.dart

@@ -0,0 +1,24 @@
+// Copyright (c) 2011, 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.
+
+import "package:expect/expect.dart";
+
+class MyAllocate {
+  const MyAllocate([int value = 0]) : value_ = value;
+  int getValue() {
+    return value_;
+  }
+
+  final int value_;
+}
+
+class AllocateTest {
+  static testMain() {
+    Expect.equals(900, (new MyAllocate(900)).getValue());
+  }
+}
+
+main() {
+  AllocateTest.testMain();
+}