refactor(@angular/build): improve vitest runnerConfig support via plugin
#31676
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…lugin Refactors the Vitest unit test runner to use a dedicated plugin for merging builder-defined configurations with user-provided configurations from a `runnerConfig` file. Previously, the configuration merging logic was handled directly in the executor, which had limitations and did not always correctly apply user overrides. By moving this logic into a Vitest plugin, we leverage Vitest's intended extension mechanism, ensuring a more robust and predictable merge of configurations. This significantly improves the ability for users to customize their test setup. Adds a new test suite to verify that common custom configurations, such as custom reporters, file exclusions, option overrides, and environment settings, are correctly applied from a `vitest.config.ts` file.
clydin
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alan-agius4
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Nov 5, 2025
alan-agius4
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Refactors the Vitest unit test runner to use a dedicated plugin for merging builder-defined configurations with user-provided configurations from a
runnerConfigfile.Previously, the configuration merging logic was handled directly in the executor, which had limitations and did not always correctly apply user overrides. By moving this logic into a Vitest plugin, we leverage Vitest's intended extension mechanism, ensuring a more robust and predictable merge of configurations. This significantly improves the ability for users to customize their test setup.
Adds a new test suite to verify that common custom configurations, such as custom reporters, file exclusions, option overrides, and environment settings, are correctly applied from a
vitest.config.tsfile.