Ternary operator support for polymer_expressions

pkg/polymer_expressions/test/eval_test.dart

Index: pkg/polymer_expressions/test/eval_test.dart
diff --git a/pkg/polymer_expressions/test/eval_test.dart b/pkg/polymer_expressions/test/eval_test.dart
index 3094994c9d740f4b934080a797187aff2467ddf7..744284e8ce0c1604f6b7ba22fd1786cca576f325 100644
--- a/pkg/polymer_expressions/test/eval_test.dart
+++ b/pkg/polymer_expressions/test/eval_test.dart
@@ -108,6 +108,16 @@ main() {
       expectEval('false && false', false);
     });
 
+    test('should evaulate ternary operators', () {
+      expectEval('true ? 1 : 2', 1);
+      expectEval('false ? 1 : 2', 2);
+      expectEval('true ? true ? 1 : 2 : 3', 1);
+      expectEval('true ? false ? 1 : 2 : 3', 2);
+      expectEval('false ? true ? 1 : 2 : 3', 3);
+      expectEval('false ? 1 : true ? 2 : 3', 2);
+      expectEval('false ? 1 : false ? 2 : 3', 3);

[Jennifer Messerly, 2014/01/28 00:03:29]

maybe add a test for `null` and some other kind of value (e.g. 42) in the
condition?

[justinfagnani, 2014/01/28 01:05:21]

Done.

+    });
+
     test('should invoke a method on the model', () {
       var foo = new Foo(name: 'foo', age: 2);
       expectEval('x()', foo.x(), foo);