Add test to check weekday pattern for today's weekday.

This corresponds to the change made in commit 33794435.

test/test_relative_date.py

@@ -29,6 +29,7 @@ class RelativeDateTester(TopydoTest):
         self.today = date(2015, 11, 6)
         self.tomorrow = date(2015, 11, 7)
         self.monday = date(2015, 11, 9)
+        self.friday = date(2015, 11, 13)
 
     def test_zero_days(self):
         result = relative_date_to_date('0d')
@@ -142,5 +143,13 @@ class RelativeDateTester(TopydoTest):
         result = relative_date_to_date('-0d')
         self.assertTrue(result, self.today)
 
+    def test_weekday_next_week(self):
+        """
+        When entering "Friday" on a Friday, return next week Friday instead of
+        today.
+        """
+        result = relative_date_to_date("fri")
+        self.assertTrue(result, self.friday)
+
 if __name__ == '__main__':
     unittest.main()