test(proxy): add unit test for ProxyService

[ShadowySpirits]

No description provided.

[codecov]

Codecov Report

Merging #813 (ab29ca5) into main (e284f99) will increase coverage by 0.42%.
The diff coverage is 33.33%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #813      +/-   ##
============================================
+ Coverage     55.26%   55.69%   +0.42%     
- Complexity     1231     1237       +6     
============================================
  Files           132      132              
  Lines          8441     8441              
  Branches        774      774              
============================================
+ Hits           4665     4701      +36     
+ Misses         3371     3331      -40     
- Partials        405      409       +4     

Components	Coverage Δ
RocketMQ Broker	∅ <ø> (∅)
RocketMQ Common	5.80% <ø> (ø)
RocketMQ Controller	55.13% <ø> (ø)
RocketMQ Proxy	38.33% <33.33%> (+1.90%)	⬆️
RocketMQ Store	74.34% <ø> (ø)
RocketMQ Stream	∅ <ø> (∅)
RocketMQ Metadata	35.44% <ø> (ø)

Files	Coverage Δ
...tmq/store/queue/DefaultLogicQueueStateMachine.java	88.54% <ø> (ø)
...mq/rocketmq/proxy/grpc/client/GrpcProxyClient.java	18.26% <33.33%> (+14.42%)	⬆️

... and 1 file with indirect coverage changes