fix(@angular/build): ensure TestBed setup is robust in non-isolated Vitest #31731
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🚀 awesome! Thanks Charles! |
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This commit refines the Angular TestBed initialization within the Vitest runner to ensure correct behavior in non-isolated test environments (`isolate: false`).
Previously, in a non-isolated setup, the TestBed initialization logic in the virtual setup file could be problematic if the file was evaluated multiple times. This could lead to re-registering `beforeEach`/`afterEach` hooks or attempting to re-initialize the TestBed, causing errors or unexpected test behavior.
This change introduces a globally unique symbol guard (`Symbol.for('@angular/cli/testbed-setup')`) that ensures the entire TestBed setup block (including hook registration and `initTestEnvironment`) is executed only once per test run. This prevents redundant executions and potential errors.
Finally, the `isolate` option in Vitest is now explicitly defaulted to `false` when not specified by the user, aligning with the traditional Karma/Jasmine experience.
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alan-agius4
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Nov 10, 2025
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@alan-agius4 Seems no changes 
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This commit refines the Angular TestBed initialization within the Vitest runner to ensure correct behavior in non-isolated test environments (
isolate: false).Previously, in a non-isolated setup, the TestBed initialization logic in the virtual setup file could be problematic if the file was evaluated multiple times. This could lead to re-registering
beforeEach/afterEachhooks or attempting to re-initialize the TestBed, causing errors or unexpected test behavior.This change introduces a globally unique symbol guard (
Symbol.for('@angular/cli/testbed-setup')) that ensures the entire TestBed setup block (including hook registration andinitTestEnvironment) is executed only once per test run. This prevents redundant executions and potential errors.Finally, the
isolateoption in Vitest is now explicitly defaulted tofalsewhen not specified by the user, aligning with the traditional Karma/Jasmine experience.