karma-runner/karma

[Question] Can you access preprocessor errors programatically?

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#2,064 建立於 2016年4月20日

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 (9 留言) (1 反應) (0 負責人)JavaScript (11,918 star) (1,703 fork)batch import
help wantedtype: bug

描述

I'm running karma programatically through the Server API and was wondering if there was a good way catch preprocessor errors when they occur.

Right now, if a preprocessor (babel for example) fails, I'll just see a message logged from Karma, but the server will still start up.

I'd like to be able to cancel the whole process, or at least catch the error when it occurs. I tried tracing my way through the source, and couldn't exactly understand what happens when a preprocessor invokes it's callback with an error: https://github.com/karma-runner/karma/blob/master/lib/preprocessor.js#L26

Any advice?

貢獻者指南

技術棧
javascriptnodejs
領域
testingdeveloper experience
議題類型
feature
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-3 hours
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
Familiarity with Node.jsUnderstanding of Karma's preprocessor systemBasic knowledge of error handling in callbacks
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
30
研究方向
Examine the Karma source code, especially lib/preprocessor.js (line 26) to understand how preprocessor errors are currently handled. Look at the Server API documentation and see if there are events or hooks to capture errors. Consider proposing a new event or callback modification. Since the issue is from 2016, check if later versions have addressed this. The linked file shows that the done callback is called with an error object; investigate how that error propagates.
[Question] Can you access preprocessor errors programatically? · karma-runner/karma#2064 | Good First Issue