Fixes #178

test/browser/runtime_tests.js

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 var assert = chai.assert;
 
 suite('generic', () => {
   "use strict";
 
   let generic = dart.generic;
@@ skipping 54 matching lines @@
     assert.strictEqual(Object.keys(t1).length, 0);
     assert.strictEqual(Object.keys(t2).length, 0);
   });
 
   test('type constructor is reflectable', () => {
     let SomeType = generic(function(x, y) { return Object.create(null); });
     let someValue = SomeType('hi', 123);
     assert.equal(someValue[dart.originalDeclaration], SomeType);
     assert.deepEqual(someValue[dart.typeArguments], ['hi', 123]);
   });
+
+  test('proper type constructor is called', () => {
+    // This tests https://github.com/dart-lang/dev_compiler/issues/178
+    let l = dart.setType([1, 2, 3], core.List$(core.int));
+    let s = l[core.$join]();
+    assert.equal(s, '123');
+  });
 });
 
 
 suite('instanceOf', () => {
   "use strict";
 
   let expect = assert.equal;
   let isGroundType = dart.isGroundType;
   let generic = dart.generic;
   let intIsNonNullable = false;
@@ skipping 309 matching lines @@
 
 suite('primitives', function() {
   'use strict';
 
   test('fixed length list', () => {
     let list = new core.List(10);
     list[0] = 42;
     assert.throws(() => list.add(42));
   });
 });