Check in codegen test expectations.

test/codegen/expect/language/identical_closure_test.js

Index: test/codegen/expect/language/identical_closure_test.js
diff --git a/test/codegen/expect/language/identical_closure_test.js b/test/codegen/expect/language/identical_closure_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..d42af8fb6c8fedd38d8e05da23ba93eb842b7729
--- /dev/null
+++ b/test/codegen/expect/language/identical_closure_test.js
@@ -0,0 +1,42 @@
+dart_library.library('language/identical_closure_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__identical_closure_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const identical_closure_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  identical_closure_test.myIdentical = core.identical;
+  identical_closure_test.Point = class Point extends core.Object {
+    new(x, y) {
+      this.x = x;
+      this.y = y;
+    }
+  };
+  dart.setSignature(identical_closure_test.Point, {
+    constructors: () => ({new: dart.definiteFunctionType(identical_closure_test.Point, [core.num, core.num])})
+  });
+  identical_closure_test.main = function() {
+    expect$.Expect.isTrue(identical_closure_test.myIdentical(42, 42));
+    expect$.Expect.isFalse(identical_closure_test.myIdentical(42, 41));
+    expect$.Expect.isTrue(identical_closure_test.myIdentical(42.0, 42.0));
+    expect$.Expect.isFalse(identical_closure_test.myIdentical(42.0, 41.0));
+    expect$.Expect.isTrue(identical_closure_test.myIdentical(35184372088832, 35184372088832));
+    expect$.Expect.isFalse(identical_closure_test.myIdentical(35184372088832, 35184372088831));
+    expect$.Expect.isFalse(identical_closure_test.myIdentical("hello", 41));
+    let p = new identical_closure_test.Point(1, 1);
+    let q = new identical_closure_test.Point(1, 1);
+    expect$.Expect.isFalse(identical_closure_test.myIdentical(p, q));
+    let a = "hello";
+    let b = "hello";
+    expect$.Expect.isTrue(identical_closure_test.myIdentical(a, b));
+    expect$.Expect.isFalse(identical_closure_test.myIdentical(42, null));
+    expect$.Expect.isTrue(identical_closure_test.myIdentical(null, null));
+  };
+  dart.fn(identical_closure_test.main, VoidTodynamic());
+  // Exports:
+  exports.identical_closure_test = identical_closure_test;
+});