🐛 tech-insights-backend: Forbidden dependency on @backstage/backend-test-utils

[rohitmishr]

🔖 Need

Issue: ReferenceError: jest is not defined

Context: We recently upgraded our Backstage version and created a custom TechInsights plugin. This plugin has a dependency on @backstage/backend-test-utils. When attempting to run yarn dev, we encounter the following error:

/Users/rxxxmxxxx/Documents/bug-fix-tech-insights/xyzz-idp-app/packages/backend/node_modules/@backstage-community/plugin-tech-insights-backend/node_modules/@backstage/backend-test-utils/src/next/services/mockServices.ts:64 child: jest.fn().mockImplementation(createLoggerMock), ^

ReferenceError: jest is not defined at createLoggerMock (/Users/rxxxmxxxx/Documents/bug-fix-tech-insights/xyzz-idp-app/packages/backend/node_modules/@backstage-community/plugin-tech-insights-backend/node_modules/@backstage/backend-test-utils/src/next/services/mockServices.ts:64)

Steps Taken:

1. Upgraded Backstage version.
2. Created a custom TechInsights plugin.
3. Added @backstage/backend-test-utils as a dependency.
4. Ran yarn dev.

Error Details:

• The error occurs in the mockServices.ts file at line 64. (inside my node_modules of backend I am able to see this path "backend/node_modules/@backstage-community/plugin-tech-insights-backend/node_modules/@backstage/backend-test-utils/src/next/services/mockServices.ts:64")
• It seems that jest is not defined in the context where createLoggerMock is being called.

Request for Help: Could anyone provide guidance on how to resolve this ReferenceError? Specifically, how can we ensure that jest is properly defined and available in the context of mockServices.ts?

🎉 Proposal

Issue: ReferenceError: jest is not defined Context: We recently upgraded our Backstage version and created a custom TechInsights plugin. This plugin has a dependency on @backstage/backend-test-utils. When attempting to run yarn dev, we encounter the following error:

/Users/rxxxmxxxx/Documents/bug-fix-tech-insights/xyzz-idp-app/packages/backend/node_modules/@backstage-community/plugin-tech-insights-backend/node_modules/@backstage/backend-test-utils/src/next/services/mockServices.ts:64 child: jest.fn().mockImplementation(createLoggerMock), ^

ReferenceError: jest is not defined at createLoggerMock (/Users/rxxxmxxxx/Documents/bug-fix-tech-insights/xyzz-idp-app/packages/backend/node_modules/@backstage-community/plugin-tech-insights-backend/node_modules/@backstage/backend-test-utils/src/next/services/mockServices.ts:64)

when we checked this repo link for latest @backstage/backend-test-utils but after doing yarn install and yarn dev we are getting jest not define.

〽️ Alternatives

No response

❌ Risks

No response

👀 Have you spent some time to check if this RFC has been raised before?

• [X] I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• [X] I have read the Code of Conduct

[Rugvip]

Are you seeing this error when importing @backstage/backend-test-utils in a test file? It is only intended to be used in tests, if it's imported in the main build it's expected that it breaks in this way.

[rohitmishr]

when we are trying to run application via yarn dev then I am getting this jest not define.

The thing is we are not able to find mockservice.ts inside backend/node_modules.

when we tried to upgrade backstage version from 1.26 to 1.31 then we are getting this error.

[rohitmishr]

And this is getting from plugin tech-insigths.

[Rugvip]

I see that the tech-insights backend has a production dependency on backend-test-utils: https://github.com/backstage/community-plugins/blob/fdb08e6fe73cc3c0d2be8e37b059979a5cd2eb0c/workspaces/tech-insights/plugins/tech-insights-backend/package.json#L53

There's also no /testUtils entry point or similar, so that dependency shouldn't be there and is looking like a bug in the tech insights plugin. Gonna move this over to the community plugins repo for fixing there

[awanlin]

Contributions to fix this welcome 👍