jestjs/jest

Allow buffering console when running a single test

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#6,441 创建于 2018年6月11日

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 (5 评论) (1 反应) (0 负责人)TypeScript (45,361 star) (6,653 fork)batch import
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描述

🐛 Bug Report

Splitting this from this issue: https://github.com/facebook/jest/issues/4156#issuecomment-395848216

In scenarios involving running multiple tests, console output is buffered and can be intercepted by a test reporter. When only a single test runs, the output is never buffered. This behavior is mentioned here: https://github.com/facebook/jest/issues/2080

To Reproduce

Initiate a test run that matches only a single test.

Expected behavior

In a reporter, TestResult.console should be populated for all test run scenarios (at least optionally).

Run npx envinfo --preset jest

Paste the results here:

  System:
    OS: macOS High Sierra 10.13.5
    CPU: x64 Intel(R) Core(TM) i7-7920HQ CPU @ 3.10GHz
  Binaries:
    Node: 8.9.4 - ~/.nvm/versions/node/v8.9.4/bin/node
    Yarn: 1.6.0 - /usr/local/bin/yarn
    npm: 5.6.0 - ~/.nvm/versions/node/v8.9.4/bin/npm
  npmPackages:
    @types/jest: 22.2.3 => 22.2.3
    jest: =23.1.0 => 23.1.0

贡献者指南

技术栈
javascripttypescript
领域
testing
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。
1-2 days
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。
clear
前置要求
Familiarity with JestNode.jsJavaScript
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
The issue requires investigating how Jest buffers console output during test runs. Look into the test runner logic, possibly in packages/jest core, specifically how it handles single vs multiple test runs. The discussion in issue #4156 and #2080 provides context. The deliverable is to ensure TestResult.console is populated for single test runs, potentially by updating the buffering logic in the reporter or runner.