add test

Author: mmalerba

src/lib/datepicker/datepicker.spec.ts

@@ -275,7 +275,7 @@ describe('MdDatepicker', () => {
       }));
     });
 
-    describe('datepicker with no inputs', () => {
+    fdescribe('datepicker with no inputs', () => {
       let fixture: ComponentFixture<NoInputDatepicker>;
       let testComponent: NoInputDatepicker;
 
@@ -291,6 +291,10 @@ describe('MdDatepicker', () => {
         fixture.detectChanges();
       }));
 
+      it('should not throw when accessing disabled property', () => {
+        expect(() => testComponent.datepicker.disabled).not.toThrow();
+      });
+
       it('should throw when opened with no registered inputs', async(() => {
         expect(() => testComponent.datepicker.open()).toThrow();
       }));