Check in codegen test expectations.

test/codegen/expect/language/compile_time_constant_f_test.js

+dart_library.library('language/compile_time_constant_f_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__compile_time_constant_f_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 compile_time_constant_f_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  compile_time_constant_f_test.A = class A extends core.Object {
+    new(x) {
+      this.x = x;
+    }
+    named(x) {
+      if (x === void 0) x = null;
+      this.x = x;
+    }
+    named2(x) {
+      if (x === void 0) x = 2;
+      this.x = x;
+    }
+  };
+  dart.defineNamedConstructor(compile_time_constant_f_test.A, 'named');
+  dart.defineNamedConstructor(compile_time_constant_f_test.A, 'named2');
+  dart.setSignature(compile_time_constant_f_test.A, {
+    constructors: () => ({
+      new: dart.definiteFunctionType(compile_time_constant_f_test.A, [dart.dynamic]),
+      named: dart.definiteFunctionType(compile_time_constant_f_test.A, [], [dart.dynamic]),
+      named2: dart.definiteFunctionType(compile_time_constant_f_test.A, [], [dart.dynamic])
+    })
+  });
+  compile_time_constant_f_test.a1 = dart.const(new compile_time_constant_f_test.A(0));
+  compile_time_constant_f_test.a2 = dart.const(new compile_time_constant_f_test.A.named());
+  compile_time_constant_f_test.a3 = dart.const(new compile_time_constant_f_test.A.named(1));
+  compile_time_constant_f_test.a4 = dart.const(new compile_time_constant_f_test.A.named2());
+  compile_time_constant_f_test.a5 = dart.const(new compile_time_constant_f_test.A.named2(3));
+  compile_time_constant_f_test.main = function() {
+    expect$.Expect.equals(0, compile_time_constant_f_test.a1.x);
+    expect$.Expect.equals(null, compile_time_constant_f_test.a2.x);
+    expect$.Expect.equals(1, compile_time_constant_f_test.a3.x);
+    expect$.Expect.equals(2, compile_time_constant_f_test.a4.x);
+    expect$.Expect.equals(3, compile_time_constant_f_test.a5.x);
+  };
+  dart.fn(compile_time_constant_f_test.main, VoidTodynamic());
+  // Exports:
+  exports.compile_time_constant_f_test = compile_time_constant_f_test;
+});