+ test {ZADD - Variadic version base case} {
+ r del myzset
+ list [r zadd myzset 10 a 20 b 30 c] [r zrange myzset 0 -1 withscores]
+ } {3 {a 10 b 20 c 30}}
+
+ test {ZADD - Return value is the number of actually added items} {
+ list [r zadd myzset 5 x 20 b 30 c] [r zrange myzset 0 -1 withscores]
+ } {1 {x 5 a 10 b 20 c 30}}
+
+ test {ZADD - Variadic version does not add nothing on single parsing err} {
+ r del myzset
+ catch {r zadd myzset 10 a 20 b 30.badscore c} e
+ assert_match {*ERR*not*double*} $e
+ r exists myzset
+ } {0}
+
+ test {ZADD - Variadic version will raise error on missing arg} {
+ r del myzset
+ catch {r zadd myzset 10 a 20 b 30 c 40} e
+ assert_match {*ERR*syntax*} $e
+ }
+
+ test {ZINCRBY does not work variadic even if shares ZADD implementation} {
+ r del myzset
+ catch {r zincrby myzset 10 a 20 b 30 c} e
+ assert_match {*ERR*wrong*number*arg*} $e
+ }
+