Check in codegen test expectations.

test/codegen/expect/language/constant_string_interpolation_test.js

Index: test/codegen/expect/language/constant_string_interpolation_test.js
diff --git a/test/codegen/expect/language/constant_string_interpolation_test.js b/test/codegen/expect/language/constant_string_interpolation_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..67472618331c45ae14110908e37575e9c2a25928
--- /dev/null
+++ b/test/codegen/expect/language/constant_string_interpolation_test.js
@@ -0,0 +1,46 @@
+dart_library.library('language/constant_string_interpolation_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__constant_string_interpolation_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 constant_string_interpolation_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let dynamicToString = () => (dynamicToString = dart.constFn(dart.definiteFunctionType(core.String, [dart.dynamic])))();
+  constant_string_interpolation_test.main = function() {
+    let a = new constant_string_interpolation_test.A();
+    for (let i = 0; i < 20; i++) {
+      let r = constant_string_interpolation_test.interpolIt(a);
+      expect$.Expect.stringEquals("hello home", r);
+    }
+    let b = new constant_string_interpolation_test.B();
+    let r = constant_string_interpolation_test.interpolIt(b);
+    expect$.Expect.stringEquals("hello world", r);
+  };
+  dart.fn(constant_string_interpolation_test.main, VoidTodynamic());
+  constant_string_interpolation_test.interpolIt = function(v) {
+    return dart.str`hello ${dart.dsend(v, 'foo')}`;
+  };
+  dart.fn(constant_string_interpolation_test.interpolIt, dynamicToString());
+  constant_string_interpolation_test.A = class A extends core.Object {
+    foo() {
+      return "home";
+    }
+  };
+  dart.setSignature(constant_string_interpolation_test.A, {
+    methods: () => ({foo: dart.definiteFunctionType(dart.dynamic, [])})
+  });
+  constant_string_interpolation_test.B = class B extends core.Object {
+    foo() {
+      return "world";
+    }
+  };
+  dart.setSignature(constant_string_interpolation_test.B, {
+    methods: () => ({foo: dart.definiteFunctionType(dart.dynamic, [])})
+  });
+  // Exports:
+  exports.constant_string_interpolation_test = constant_string_interpolation_test;
+});