fix(@angular/build): allow disabling Vitest isolation from builder#33294
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Keep the isolate builder option undefined when it is omitted so a Vitest runner config can provide its own value. Previously, ng test --isolate worked because true was forwarded as an override, but ng test --no-isolate was normalized to false and then treated the same as an omitted option. As a result, test.isolate: true in vitest-base.config.ts stayed active. Forward explicit false values to the Vitest project config so --no-isolate can override runnerConfig while the default still aligns with the Karma/Jasmine experience.
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This pull request updates the unit test builder to allow the isolate option to be explicitly set to false instead of defaulting to false when undefined. This ensures that a CLI option of isolate: false can override a true setting in the Vitest configuration file. A unit test has been added to verify this behavior. I have no feedback to provide as there are no review comments.
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clydin
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What kind of change does this PR introduce?
What is the current behavior?
Previously,
ng test --isolateworked because true was forwarded as an override, butng test --no-isolatewas normalized to false and then treated the same as an omitted option. As a result,test.isolate: trueinvitest-base.config.tsstayed active.What is the new behavior?
Keep the isolate builder option undefined when it is omitted so a Vitest runner config can provide its own value.
Forward explicit false values to the Vitest project config so
--no-isolatecan override runnerConfig while the default still aligns with the Karma/Jasmine experience.Does this PR introduce a breaking change?
Other information