Migrate block 116.

tests/language_strong/identical_closure_test.dart

-// Copyright (c) 2012, 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";
-
-var myIdentical = identical;
-
-class Point {
-  num x, y;
-  Point(this.x, this.y);
-}
-
-main() {
-  // int.
-  Expect.isTrue(myIdentical(42, 42));
-  Expect.isFalse(myIdentical(42, 41));
-
-  // double.
-  Expect.isTrue(myIdentical(42.0, 42.0));
-  Expect.isFalse(myIdentical(42.0, 41.0));
-
-  // Mint (2^45).
-  Expect.isTrue(myIdentical(35184372088832, 35184372088832));
-  Expect.isFalse(myIdentical(35184372088832, 35184372088831));
-
-  // Different types.
-  Expect.isFalse(myIdentical("hello", 41));
-
-  // Points.
-  var p = new Point(1, 1);
-  var q = new Point(1, 1);
-  Expect.isFalse(myIdentical(p, q));
-
-  // Strings.
-  var a = "hello";
-  var b = "hello";
-  // Identical strings are coalesced into single instances.
-  Expect.isTrue(myIdentical(a, b));
-
-  // Null handling.
-  Expect.isFalse(myIdentical(42, null));
-  Expect.isTrue(myIdentical(null, null));
-}