test: remove duplicate code

[simlecode]

关联的Issues (Related Issues)

close

改动 (Proposed Changes)

移除测试中重复的代码

附注 (Additional Info)

自查清单 (Checklist)

在你认为本 PR 满足被审阅的标准之前，需要确保 / Before you mark the PR ready for review, please make sure that:

• 符合Venus项目管理规范中关于PR的相关标准 / The PR follows the PR standards set out in the Venus project management guidelines
• 具有清晰明确的commit message / All commits have a clear commit message.
• 包含相关的的测试用例或者不需要新增测试用例 / This PR has tests for new functionality or change in behaviour or not need to add new tests.
• 包含相关的的指南以及文档或者不需要新增文档 / This PR has updated usage guidelines and documentation or not need
• 通过必要的检查项 / All checks are green

[codecov-commenter]

Codecov Report

Merging #308 (41b5b4c) into master (de5d8ed) will decrease coverage by 0.47%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #308      +/-   ##
==========================================
- Coverage   54.31%   53.84%   -0.47%     
==========================================
  Files          69       69              
  Lines        7022     7022              
==========================================
- Hits         3814     3781      -33     
- Misses       2909     2940      +31     
- Partials      299      301       +2     

Flag	Coverage Δ
unittests	53.84% <100.00%> (-0.47%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
models/mysql/message.go	77.56% <100.00%> (ø)
models/sqlite/message.go	81.54% <100.00%> (ø)
testhelper/mock_data.go	81.25% <100.00%> (ø)
testhelper/mock_node_repo.go	26.31% <0.00%> (-45.62%)	⬇️
service/node_service.go	70.00% <0.00%> (-10.00%)	⬇️
service/address_service.go	60.86% <0.00%> (-2.61%)	⬇️
service/message_service.go	59.80% <0.00%> (-0.15%)	⬇️

[diwufeiwen]

LGTM