Check in codegen test expectations.

test/codegen/expect/language/pure_function2_test.js

Index: test/codegen/expect/language/pure_function2_test.js
diff --git a/test/codegen/expect/language/pure_function2_test.js b/test/codegen/expect/language/pure_function2_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..4689c83baa0ae783fbbfb120d4661b34eb3aa9a8
--- /dev/null
+++ b/test/codegen/expect/language/pure_function2_test.js
@@ -0,0 +1,45 @@
+dart_library.library('language/pure_function2_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__pure_function2_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_function2_test = Object.create(null);
+  let JSArrayOfObject = () => (JSArrayOfObject = dart.constFn(_interceptors.JSArray$(core.Object)))();
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  pure_function2_test.confuse = function(x) {
+    if (new core.DateTime.now().millisecondsSinceEpoch == 42) return pure_function2_test.confuse(x);
+    return x;
+  };
+  dart.fn(pure_function2_test.confuse, dynamicTodynamic());
+  pure_function2_test.foo = function(trace) {
+    dart.dsend(trace, 'add', "foo");
+    return "foo";
+  };
+  dart.fn(pure_function2_test.foo, dynamicTodynamic());
+  pure_function2_test.bar = function(trace) {
+    dart.dsend(trace, 'add', "bar");
+    return "bar";
+  };
+  dart.fn(pure_function2_test.bar, dynamicTodynamic());
+  pure_function2_test.main = function() {
+    let f = pure_function2_test.confuse(pure_function2_test.foo);
+    let b = pure_function2_test.confuse(pure_function2_test.bar);
+    let trace = [];
+    let t1 = dart.dcall(f, trace);
+    let t2 = dart.dcall(b, trace);
+    let t3 = core.identical(t2, "foo");
+    let t4 = trace[dartx.add](t1);
+    trace[dartx.add](t3);
+    trace[dartx.add](t3);
+    expect$.Expect.listEquals(JSArrayOfObject().of(["foo", "bar", "foo", false, false]), trace);
+  };
+  dart.fn(pure_function2_test.main, VoidTodynamic());
+  // Exports:
+  exports.pure_function2_test = pure_function2_test;
+});