Check in codegen test expectations.

test/codegen/expect/language/pure_function_test.js

Index: test/codegen/expect/language/pure_function_test.js
diff --git a/test/codegen/expect/language/pure_function_test.js b/test/codegen/expect/language/pure_function_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..b3eb1258919f360211242e5f1d2638622115aebe
--- /dev/null
+++ b/test/codegen/expect/language/pure_function_test.js
@@ -0,0 +1,47 @@
+dart_library.library('language/pure_function_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__pure_function_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 pure_function_test = Object.create(null);
+  let JSArrayOfString = () => (JSArrayOfString = dart.constFn(_interceptors.JSArray$(core.String)))();
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  pure_function_test.A = class A extends core.Object {
+    new(x, y) {
+      this.y = y;
+      this.x = null;
+      this.x = x;
+    }
+    toString() {
+      return "a";
+    }
+  };
+  dart.setSignature(pure_function_test.A, {
+    constructors: () => ({new: dart.definiteFunctionType(pure_function_test.A, [dart.dynamic, dart.dynamic])})
+  });
+  pure_function_test.foo = function(trace) {
+    return dart.dsend(trace, 'add', "foo");
+  };
+  dart.fn(pure_function_test.foo, dynamicTodynamic());
+  pure_function_test.bar = function(trace) {
+    return dart.dsend(trace, 'add', "bar");
+  };
+  dart.fn(pure_function_test.bar, dynamicTodynamic());
+  pure_function_test.main = function() {
+    let trace = [];
+    let t1 = pure_function_test.foo(trace);
+    let t2 = pure_function_test.bar(trace);
+    let a = new pure_function_test.A(t1, t2);
+    trace[dartx.add](a.toString());
+    expect$.Expect.listEquals(JSArrayOfString().of(["foo", "bar", "a"]), trace);
+  };
+  dart.fn(pure_function_test.main, VoidTodynamic());
+  // Exports:
+  exports.pure_function_test = pure_function_test;
+});