Correct Yahoo period end timestamp calculation (#365)

Author: gliptak

pandas_datareader/tests/yahoo/test_yahoo.py

@@ -104,17 +104,17 @@ def test_get_data_adjust_price(self):
         assert 'Adj Close' not in goog_adj.columns
         assert (goog['Open'] * goog_adj['Adj_Ratio']).equals(goog_adj['Open'])
 
-    @pytest.mark.xfail(reason="failing after #355")
+    @skip_on_exception(RemoteDataError)
     def test_get_data_interval(self):
         # daily interval data
         pan = web.get_data_yahoo('XOM', '2013-01-01',
                                  '2013-12-31', interval='d')
-        assert len(pan) == 251
+        assert len(pan) == 252
 
         # weekly interval data
         pan = web.get_data_yahoo('XOM', '2013-01-01',
                                  '2013-12-31', interval='w')
-        assert len(pan) == 52
+        assert len(pan) == 53
 
         # monthly interval data
         pan = web.get_data_yahoo('XOM', '2012-12-31',

pandas_datareader/yahoo/daily.py

@@ -97,7 +97,8 @@ def yurl(symbol):
 
     def _get_params(self, symbol):
         unix_start = int(time.mktime(self.start.timetuple()))
-        unix_end = int(time.mktime(self.end.timetuple()))
+        day_end = self.end.replace(hour=23, minute=59, second=59)
+        unix_end = int(time.mktime(day_end.timetuple()))
 
         params = {
             'period1': unix_start,