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@ui5/middleware-code-coverage - TypeScript support #189
Description
Is your feature request related to a problem? Please describe.
The @ui5/middleware-code-coverage currently does not work within TypeScript based projects, e.g. created via easy-ui5 generators ts-app / ts-library.
Describe the solution you'd like
The client-side coverage feature should also be supported for TypeScript based projects.
Describe alternatives you've considered
Coverage for TypeScript sources can currently only be measured within a test-runner setup, e.g. Karma (needs karma-ui5-transpile.
Activity
docs(readme.md): document TypeScript limitation
docs(readme.md): document TypeScript limitation
FrankVisuals commentedon Jul 5, 2024
Any chance typescript support is added soon?
matz3 commentedon Jul 15, 2024
It is not expected to be a straight-forward solution, which is why we didn't add it in the initial version.
We are looking into options, but it's not likely to happen in the next months - sorry.
srinivas-gururao commentedon Jan 21, 2025
We are in need of similar requirement. When is it planned to support typescript project generated using easyui5-tslib?
flovogt commentedon Jan 21, 2025
@srinivas-gururao we are currently working on a concept to refactor how server middleware's are designed. See UI5/cli#1036 The implementation of this RFC is the foundation to later offer typescript support also in
@ui5/middleware-code-coverage.We won't be able to work on this feature in the next months, but I hope to give an update in the second half of 2025.
SAP internally this feature is tracked in CPOUI5FOUNDATION-865.
tobiashofmann commentedon Nov 18, 2025
Hi @flovogt second half of 2025 is coming to an end. Can you already provide an update on this issue?
flovogt commentedon Nov 18, 2025
We are working on the new concept but I can not announce any concrete timeline for general availability. It will definitely be part of a next major version of UI5 CLI and not be downported to UI5 CLI v4.
tobiashofmann commentedon Nov 21, 2025
In the meantime, there might be a workaround: I came accross the UI5 Typescript sample app that "solves" the code coverage problem. Using ui5-coverage.yaml istanbul is started and instruments the ts files.
The result can be taken from window.__coverage__ and stored in a folder (.nyc_output) and the coverage report can be generated by running nyc report.
This might be not as nice as the feature we get from middleware-code-coverage. Getting the JSON data from window.__coverage__ might be a problem if you are only using QUnit. In my case it works as I am using playwright/puppeteer.
Maybe this helps someone to get the code coverage for a typescript app until the middleware is updated.
flovogt commentedon Feb 11, 2026
Backlog item is CPOUI5FOUNDATION-1203.