fix: in testBalanceThreshold support case where balance is null
#1975
| Job | Run time |
|---|---|
| 1m 44s | |
| 0s | |
| 1m 44s |
testBalanceThreshold support case where balance is null
#1975
| Job | Run time |
|---|---|
| 1m 44s | |
| 0s | |
| 1m 44s |