karma-runner/karma

Ensure all stream buffers are drained before exiting process in single run mode.

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#742 创建于 2013年9月11日

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 (3 评论) (0 反应) (0 负责人)JavaScript (11,918 star) (1,703 fork)batch import
help wantedtype: bugwindows

描述

After investigating a strange behavior on running karma with TeamCity on Windows, I noticed the following issue.

When running the following command in PowerShell:

karma start --single-run | Out-File C:\test.out

The writing function is non-blocking/asynchronous & the written/piped data can be buffered, which could lead to some test results being lost.

Karma needs to ensure that all buffers have been drained or that the writing functions have completed (if they are non-blocking) before exiting the process.

贡献者指南

技术栈
nodejs
领域
backendtestingdeveloper experience
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
Node.js streamsasynchronous programming
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
40
研究方向
Examine the main process exit logic in Karma, likely in lib/server.js or similar. Look for where the process exits after single run. Investigate how stdout/stderr streams are handled and ensure all pending writes are completed before calling process.exit. The issue mentions PowerShell and Out File, but the core problem is generic buffering in Node.js streams.
Ensure all stream buffers are drained before exiting process in single run mode. · karma-runner/karma#742 | Good First Issue