test: clear data before and after test

Author: Gerrard-YNWA

t/v3/serializer.t

@@ -62,26 +62,32 @@ __DATA__
             check_res(etcd, err)
 
             local res
-            res, err = etcd:set("/dir/v3/b", '"foo"')
+            res, err = etcd:rmdir("/dir")
+            check_res(res, err, nil, 200)
+
+            res, err = etcd:set("/dir/v3/a", '"foo"')
             check_res(res, err)
 
-            res, err = etcd:get("/dir/v3/b")
+            res, err = etcd:get("/dir/v3/a")
             check_res(res, err, '"foo"')
             
             local s = cjson.encode({a = 1})
-            res, err = etcd:setx("/dir/v3/c", s)
+            res, err = etcd:setx("/dir/v3/a", s)
             check_res(res, err, nil, 200)
 
-            res, err = etcd:get("/dir/v3/c")
+            res, err = etcd:get("/dir/v3/a")
             check_res(res, err, s, 200)
 
-            res, err = etcd:setnx("/dir/v3/d", "")
+            res, err = etcd:setnx("/dir/v3/not_exist", "")
             check_res(res, err, nil, 200)
 
-            res, err = etcd:get("/dir/v3/d")
+            res, err = etcd:get("/dir/v3/not_exist")
             check_res(res, err, "", 200)
 
-            res, err = etcd:set("/dir/v3/a", 111)
+            res, err = etcd:rmdir("/dir")
+            check_res(res, err, nil, 200)
+
+            res, err = etcd:set("/dir/v3/b", 111)
             check_res(res, err)
         }
     }
@@ -110,38 +116,44 @@ err: unsupported type for number
             check_res(etcd, err)
 
             local res
+            res, err = etcd:rmdir("/dir")
+            check_res(res, err, nil, 200)
+
             res, err = etcd:set("/dir/v3/a", 111)
             check_res(res, err)
 
             res, err = etcd:get("/dir/v3/a")
             check_res(res, err, 111)
 
-            res, err = etcd:set("/dir/v3/b", '"foo"')
+            res, err = etcd:set("/dir/v3/a", '"foo"')
             check_res(res, err)
 
-            res, err = etcd:get("/dir/v3/b")
+            res, err = etcd:get("/dir/v3/a")
             check_res(res, err, '"foo"')
             
             local s = cjson.encode({a = 1})
-            res, err = etcd:setx("/dir/v3/c", s)
+            res, err = etcd:setx("/dir/v3/a", s)
             check_res(res, err, nil, 200)
 
-            res, err = etcd:get("/dir/v3/c")
+            res, err = etcd:get("/dir/v3/a")
             check_res(res, err, s, 200)
 
-            res, err = etcd:setnx("/dir/v3/d", "")
+            res, err = etcd:setnx("/dir/v3/not_exist", "")
             check_res(res, err, nil, 200)
 
-            res, err = etcd:get("/dir/v3/d")
+            res, err = etcd:get("/dir/v3/not_exist")
             check_res(res, err, "", 200)
+
+            res, err = etcd:rmdir("/dir")
+            check_res(res, err, nil, 200)
         }
     }
 --- request
 GET /t
---- error_log
+--- no_error_log
 failed to check value, got: nil, expect:
 --- response_body
 checked val as expect: 111
 checked val as expect: "foo"
 checked val as expect: {"a":1}
-failed to check value
+checked val as expect: