[CI]【Hackathon 9th Sprint No.35】功能模块 fastdeploy/engine/ common_engine.py 单测补充

[kesmeey]

Motivation

No need

Modifications

No need

Usage or Command

No need

Accuracy Tests

No need

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
  • You can add new tags based on the PR content, but the semantics must be clear.
• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
• If the current PR is submitting to the release branch, make sure the PR has been submitted to the develop branch, then cherry-pick it to the release branch with the [Cherry-Pick] PR tag.

[paddle-bot]

Thanks for your contribution!

[Copilot]

Pull request overview

本 PR 为 Hackathon 9th Sprint No.35 任务，旨在补充 fastdeploy/engine/common_engine.py 模块的单元测试覆盖率。主要添加了针对 EngineService 核心功能的测试用例，包括任务插入、预填充请求处理、分块更新、token 解码和 ZMQ 通信等关键路径的测试。

• 新增 10 个测试方法覆盖 common_engine.py 中的各种边界条件和错误处理路径
• 添加辅助方法 _make_request 和 _make_minimal_engine 简化测试对象创建
• 引入必要的导入（types, Request, RequestOutput, envs）支持新测试

[Copilot]

RequestOutput is already imported at the top of the file (line 27). This local import is redundant and should be removed.

Suggested change

from fastdeploy.engine.request import RequestOutput

[Copilot]

The envs module is already imported at the top of the file (line 28). This local import is redundant and should be removed.

Suggested change

from fastdeploy.utils import envs

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (develop@672620c). Learn more about missing BASE report.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #5665   +/-   ##
==========================================
  Coverage           ?   18.80%           
==========================================
  Files              ?      345           
  Lines              ?    45095           
  Branches           ?     6915           
==========================================
  Hits               ?     8481           
  Misses             ?    36109           
  Partials           ?      505           

Flag	Coverage Δ
GPU	18.80% <ø> (?)

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.