TST: get_options_data ValueError if given only one of month/year GH6105

Author: y-p

pandas/io/tests/test_data.py

@@ -266,6 +266,12 @@ def test_get_options_data(self):
             assert len(calls)>1
             assert len(puts)>1
 
+    def test_get_options_data(self):
+
+        # regression test GH6105
+        self.assertRaises(ValueError,self.aapl.get_options_data,month=3)
+        self.assertRaises(ValueError,self.aapl.get_options_data,year=1992)
+
     @network
     def test_get_near_stock_price(self):
         try: