Check in codegen test expectations.

test/codegen/expect/language/index_test.js

Index: test/codegen/expect/language/index_test.js
diff --git a/test/codegen/expect/language/index_test.js b/test/codegen/expect/language/index_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..d2176fb8ae2521b2afd6f4bcdfdd5280b2e98164
--- /dev/null
+++ b/test/codegen/expect/language/index_test.js
@@ -0,0 +1,51 @@
+dart_library.library('language/index_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__index_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 index_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  index_test.Helper = class Helper extends core.Object {
+    static fibonacci(n) {
+      let a = 0, b = 1, i = 0;
+      while (i++ < dart.notNull(n)) {
+        a = a + b;
+        b = a - b;
+      }
+      return a;
+    }
+  };
+  dart.setSignature(index_test.Helper, {
+    statics: () => ({fibonacci: dart.definiteFunctionType(core.int, [core.int])}),
+    names: ['fibonacci']
+  });
+  index_test.IndexTest = class IndexTest extends core.Object {
+    static testMain() {
+      let a = core.List.new(10);
+      expect$.Expect.equals(10, a[dartx.length]);
+      for (let i = 0; i < dart.notNull(a[dartx.length]); i++) {
+        a[dartx.set](i, index_test.Helper.fibonacci(i));
+      }
+      a[dartx.set](index_test.IndexTest.ID_IDLE, index_test.Helper.fibonacci(0));
+      for (let i = 2; i < dart.notNull(a[dartx.length]); i++) {
+        expect$.Expect.equals(dart.dsend(a[dartx.get](i - 2), '+', a[dartx.get](i - 1)), a[dartx.get](i));
+      }
+      expect$.Expect.equals(515, a[dartx.set](3, 515));
+    }
+  };
+  dart.setSignature(index_test.IndexTest, {
+    statics: () => ({testMain: dart.definiteFunctionType(dart.dynamic, [])}),
+    names: ['testMain']
+  });
+  index_test.IndexTest.ID_IDLE = 0;
+  index_test.main = function() {
+    index_test.IndexTest.testMain();
+  };
+  dart.fn(index_test.main, VoidTodynamic());
+  // Exports:
+  exports.index_test = index_test;
+});