fix(@angular/build): enhance Vitest config merging and validation #31729
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This change improves how user-defined Vitest configurations work with the Angular CLI's unit test builder. The builder now checks for and handles specific options in `vitest-base.config.ts`. It detects the `test.projects` option, logs a warning, and removes it to prevent conflicts. The `test.include` option is handled in a similar way, ensuring the builder's test discovery is used. Any `test.setupFiles` from `vitest-base.config.ts` are now added to the CLI's setup files, supporting both single string and array formats. User-defined Vite plugins from `vitest-base.config.ts` are also combined with the builder's plugins, with a filter to prevent duplicating internal CLI plugins. These updates give users more flexibility to customize their Vitest setup while keeping the Angular CLI's test builder predictable.
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Nov 9, 2025
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This change improves how user-defined Vitest configurations work with the Angular CLI's unit test builder.
The builder now checks for and handles specific options in
vitest-base.config.ts. It detects thetest.projectsoption, logs a warning, and removes it to prevent conflicts. Thetest.includeoption is handled in a similar way, ensuring the builder's test discovery is used. Anytest.setupFilesfromvitest-base.config.tsare now added to the CLI's setup files, supporting both single string and array formats. User-defined Vite plugins fromvitest-base.config.tsare also combined with the builder's plugins, with a filter to prevent duplicating internal CLI plugins.These updates give users more flexibility to customize their Vitest setup while keeping the Angular CLI's test builder predictable.