Check in codegen test expectations.

test/codegen/expect/language/numbers_test.js

Index: test/codegen/expect/language/numbers_test.js
diff --git a/test/codegen/expect/language/numbers_test.js b/test/codegen/expect/language/numbers_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..3bc683730ecd7cd44d95188537ba3a357e818723
--- /dev/null
+++ b/test/codegen/expect/language/numbers_test.js
@@ -0,0 +1,43 @@
+dart_library.library('language/numbers_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__numbers_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 numbers_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  numbers_test.NumbersTest = class NumbersTest extends core.Object {
+    static testMain() {
+      let one = 1;
+      expect$.Expect.equals(true, core.Object.is(one));
+      expect$.Expect.equals(true, typeof one == 'number');
+      expect$.Expect.equals(true, typeof one == 'number');
+      expect$.Expect.equals(false, typeof one == 'number');
+      let two = 2.0;
+      expect$.Expect.equals(true, core.Object.is(two));
+      expect$.Expect.equals(true, typeof two == 'number');
+      expect$.Expect.equals(false, typeof two == 'number');
+      expect$.Expect.equals(true, typeof two == 'number');
+      let result = one + two;
+      expect$.Expect.equals(true, core.Object.is(result));
+      expect$.Expect.equals(true, typeof result == 'number');
+      expect$.Expect.equals(false, typeof result == 'number');
+      expect$.Expect.equals(true, typeof result == 'number');
+      expect$.Expect.equals(3.0, result);
+      return result;
+    }
+  };
+  dart.setSignature(numbers_test.NumbersTest, {
+    statics: () => ({testMain: dart.definiteFunctionType(core.double, [])}),
+    names: ['testMain']
+  });
+  numbers_test.main = function() {
+    numbers_test.NumbersTest.testMain();
+  };
+  dart.fn(numbers_test.main, VoidTodynamic());
+  // Exports:
+  exports.numbers_test = numbers_test;
+});