Check in codegen test expectations.

test/codegen/expect/language/string_interpolate2_test.js

Index: test/codegen/expect/language/string_interpolate2_test.js
diff --git a/test/codegen/expect/language/string_interpolate2_test.js b/test/codegen/expect/language/string_interpolate2_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..a61eb166205c10461e4c439c80eafe4b2e198c54
--- /dev/null
+++ b/test/codegen/expect/language/string_interpolate2_test.js
@@ -0,0 +1,57 @@
+dart_library.library('language/string_interpolate2_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__string_interpolate2_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const _interceptors = dart_sdk._interceptors;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const string_interpolate2_test = Object.create(null);
+  let JSArrayOfint = () => (JSArrayOfint = dart.constFn(_interceptors.JSArray$(core.int)))();
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let VoidToString = () => (VoidToString = dart.constFn(dart.definiteFunctionType(core.String, [])))();
+  string_interpolate2_test.StringInterpolate2Test = class StringInterpolate2Test extends core.Object {
+    static testMain() {
+      string_interpolate2_test.StringInterpolate2Test.F1 = dart.str`1 + 5 = ${1 + 5}`;
+      expect$.Expect.equals("1 + 5 = 6", string_interpolate2_test.StringInterpolate2Test.F1);
+      let fib = JSArrayOfint().of([1, 1, 2, 3, 5, 8, 13, 21]);
+      let i = 5;
+      let s = dart.str`${i}`;
+      expect$.Expect.equals("5", s);
+      s = dart.str`fib(${i}) = ${fib[dartx.get](i)}`;
+      expect$.Expect.equals("fib(5) = 8", s);
+      i = 5;
+      s = dart.str`${i} squared is ${dart.dcall(dart.fn(x => dart.dsend(x, '*', x), dynamicTodynamic()), i)}`;
+      expect$.Expect.equals("5 squared is 25", s);
+      expect$.Expect.equals("8", dart.str`${fib[dartx.length]}`);
+      expect$.Expect.equals("8", dart.str`${fib[dartx.length]}`);
+      expect$.Expect.equals("8", dart.str`${fib[dartx.length]}`);
+      let map = dart.map({red: 1, green: 2, blue: 3});
+      s = dart.str`green has value ${map[dartx.get]("green")}`;
+      expect$.Expect.equals("green has value 2", s);
+      i = 0;
+      function b() {
+        return dart.str`${++i}`;
+      }
+      dart.fn(b, VoidTodynamic());
+      s = dart.str`aaa ${dart.str`bbb ${b()} bbb`} aaa ${b()}`;
+      expect$.Expect.equals("aaa bbb 1 bbb aaa 2", s);
+      s = dart.str`a ${dart.fn(() => dart.str`b ${dart.fn(() => "c", VoidToString())()}`, VoidToString())()} d`;
+      expect$.Expect.equals("a b c d", s);
+    }
+  };
+  dart.setSignature(string_interpolate2_test.StringInterpolate2Test, {
+    statics: () => ({testMain: dart.definiteFunctionType(dart.void, [])}),
+    names: ['testMain']
+  });
+  string_interpolate2_test.StringInterpolate2Test.F1 = null;
+  string_interpolate2_test.main = function() {
+    string_interpolate2_test.StringInterpolate2Test.testMain();
+  };
+  dart.fn(string_interpolate2_test.main, VoidTodynamic());
+  // Exports:
+  exports.string_interpolate2_test = string_interpolate2_test;
+});