Angular 21 new unit test builder with Karma and zone.js
维护者通常 1 天内回复
还没有人认领这个 Issue。
评估
- 难度
- 4/5
- 预计耗时
- 3-5 天
- 新手友好度
- 45/100
- Issue 类型
- 缺陷
- 描述清晰度
- 基本清楚
- 活跃度
- 冷清
- 技术栈
- angular, typescript
- 领域
- build-system, testing
调研方向
从 packages/angular/build/src/builders/unit-test/runners/karma/executor.ts 开始，比较 angular.json 中 Angular 20 和 21 的 unit-test builder 配置。阅读报告中链接的测试迁移文档，并追踪 Karma 如何处理全局测试设置。当预期的 Karma 配置建立完成，并且文档或迁移行为涵盖所报告的升级路径时，即视为完成。
由索引模型根据 Issue 内容生成。
描述
Command
test
Is this a regression?
- Yes, this behavior used to work in the previous version
The previous version in which this bug was not present was
20
Description
After upgrading from Angular 20 to 21, I ran into NGXXXX errors when running unit tests still with Karma and zone.js.
I found a closed issue and a supposed fix for it, but that did not resolve the issue.
Others experienced the same and implemented workarounds which actually do work: StackOverflow, Reddit.
I found that the solution could be that the angular.json has to be modified to be in line with the new project template like this:
- change
"builder": "@angular/build:karma" to"builder": "@angular/build:unit-test" - add
"runner": "karma" - remove the rest of the properties (according to documentation these derive from the development configuration)
I did not find anything regarding the necessity of this change in the documentation, but if that is the case, it would be wise to mention it and maybe even add a migration schematic.
Also its not clear what is the alternative for "main": "src/test.ts" which contains global test setup. My guess is that the "setupFiles" property would be the successor (like "karmaConfig" became "runnerConfig"), but that is disabled for Karma.
So my question is: Where should I put global test setup with the new "unit-test" builder when using Karma?
Thanks in advance.
Minimal Reproduction
npm test
Exception or Error
Your Environment
Angular CLI : 21.2.5
Node.js : 24.14.0
Package Manager : npm 11.9.0
Operating System : win32 x64
Anything else relevant?
No response
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