Add test cases

Author: snower

examples/joins/inner_join.sql

@@ -23,4 +23,7 @@ group by c.name;
 
 select a.goods_name, b.order_id, c.name from `data/goodses.json` a, `data/orders.json` b, `data/users.json` c
 where a.status=0 and b.goods_id=a.goods_id and b.status=0 and b.uid in (select uid from `data/users.json` where status=0)
-  and c.uid=b.uid and c.status=0 and c.uid in (select uid from `data/users.json` where status=0);
+  and c.uid=b.uid and c.status=0 and c.uid in (select uid from `data/users.json` where status=0);
+
+select a.goods_name, b.order_id, c.name from `data/goodses.json` a, `data/orders.json` b, `data/users.json` c
+where a.status=0 and b.goods_id=a.goods_id and c.uid=b.uid;

tests/test_example_joins.py

@@ -119,3 +119,10 @@ def test_inner_join(self):
                              {'goods_name': '青菜', 'order_id': 5, 'name': '李四'},
                              {'goods_name': '白菜', 'order_id': 3, 'name': '李四'},
                              {'goods_name': '白菜', 'order_id': 6, 'name': '李四'}], "data error")
+
+        self.assert_data(28, [{'goods_name': '青菜', 'order_id': 1, 'name': '李四'},
+                              {'goods_name': '青菜', 'order_id': 2, 'name': '王五'},
+                              {'goods_name': '青菜', 'order_id': 4, 'name': '王五'},
+                              {'goods_name': '青菜', 'order_id': 5, 'name': '李四'},
+                              {'goods_name': '白菜', 'order_id': 3, 'name': '李四'},
+                              {'goods_name': '白菜', 'order_id': 6, 'name': '李四'}], "data error")